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Builders hardware is the category of commercial door components that rounds out a complete hardware set: the protective plates that keep door faces looking intact after years of cart traffic, the door stops that prevent lever handles from punching through drywall, the flush bolts that secure the inactive leaf of a double door so the active leaf can latch properly, and the coordinators that enforce the closing sequence when that sequencing is the difference between fire door compliance and failure. None of these components are as technically complex as a commercial mortise lock or a panic exit device. But every one of them can cause an inspection failure, a hardware return, or a real-world problem that the original specification did not anticipate. This guide covers the major builders hardware categories, the sizing and specification rules that apply to each, the coordination requirements for double-door assemblies, and the brands stocked at American Locksets since 2001.

What Is Builders Hardware?

Builders hardware, also called architectural door trim and door hardware accessories, is the Division 8 specification category covering all supplemental door hardware components that are not the primary locking, closing, or exiting mechanism. The category includes protective plates (kick plates, mop plates, push plates, armor plates), door stops and holders (wall stops, floor stops, overhead stops), flush bolts and coordinators for paired-door assemblies, surface bolts, door silencers, and miscellaneous trim items.

Most builders hardware products fall under ANSI/BHMA A156.6, the Architectural Door Trim standard. A156.6 defines material performance requirements, finish durability benchmarks, fastener system specifications, and dimensional tolerances for protective plates, push plates, pull plates, push-pull bars, and related items. Door stops and holders are governed by ANSI/BHMA A156.16. Flush bolts and coordinators for fire-rated assemblies operate under ANSI/BHMA A156.3 and NFPA 80.

Understanding which standard governs which product matters because fire-rated assemblies require components that are listed for use in rated assemblies. A standard kick plate on a non-fire-rated door is a clear size-and-finish specification. The same kick plate on a fire-rated door must comply with NFPA 80 Section 6.4.5.1, which requires the plate to be listed for the fire door assembly. This single code detail changes the specification on a significant portion of commercial projects.

Protective Plates: Kick Plates, Mop Plates, Push Plates and Armor Plates

Protective plates shield door faces from the concentrated impact and abrasion that daily use creates. The correct plate type depends on the location of the impact zone on the door and the severity of the abuse environment.

Kick Plates

A kick plate mounts on the push side of a door at the base, protecting against foot impact, cart strikes, and equipment contact. Standard commercial kick plate heights range from 6 to 10 inches, covering the zone from the floor up through the area most commonly struck by feet and carts. Width is typically 2 inches less than the door width on each side, leaving space for the door frame. The standard finish for commercial applications is US32D satin stainless (Type 304), which is durable, easy to clean, and matches the most common commercial hardware finish schedule.

Gauge matters significantly on kick plates. The standard specification is 0.050 inch (18 gauge) stainless steel. In high-abuse environments such as hospital corridors, school cafeterias, and food service facilities where cart traffic is heavy and daily, 0.125 inch (10 gauge) plates provide approximately 2.5 times the dent resistance of standard gauge. Ives 8400 Series kick plates are stocked at American Locksets in multiple sizes and finishes including satin stainless, bright brass, and dark bronze to match adjacent hardware.

Mop Plates

A mop plate is a kick plate with a reduced height, typically 4 to 6 inches, designed for locations where the impact zone is concentrated at the very base of the door. Janitorial closets, food service prep areas, and utility rooms where mop heads contact the door repeatedly at floor level are the standard mop plate applications. Mop plates use the same material and finish specifications as kick plates but cover a narrower zone. Specifying a full-height kick plate in a janitorial closet is an overspec that costs money without providing meaningful additional protection. Specifying a mop plate on a hospital corridor door where carts strike the door face up to 10 inches from the floor is an underspec that leaves the upper impact zone unprotected.

Push Plates

A push plate mounts on the push side of a door at hand height, protecting the door face from the concentrated wear that repeated hand contact creates. The standard commercial push plate is 4 inches by 16 inches, which covers the hand contact zone on most commercial doors. For aluminum storefront and glass doors where the door face itself is the push surface, push plates often serve an ADA accessibility function by providing a visible, tactile indicator of the correct push point.

ADA Standards Section 309 and ICC A117.1 require operable door hardware to be mounted between 15 and 48 inches above the finished floor. Push plate mounting must comply with this range. On fire-rated doors, NFPA 80 requires push plates to carry a UL listing for fire door use. The 16-inch unlabeled exception that many installers assume applies does not cover plates mounted in the hand-contact zone at handle height. Cal-Royal, Ives, and Hager push plates stocked at American Locksets are available in fire-rated configurations for rated-door applications. The complete push plates and pull plates catalog is in the push plates section.

Armor Plates

An armor plate extends from near the floor to above handle height, combining kick plate and push plate protection in a single continuous sheet. Armor plates are the correct specification for hospital corridors, school cafeterias, care facility hallways, and any high-traffic institutional environment where the entire lower door face is subject to constant impact from carts, wheelchairs, equipment, and foot traffic. The armor plate eliminates the gap between a kick plate and a push plate that would otherwise remain unprotected at mid-door height. Standard armor plate heights range from 34 to 48 inches.

Door Stops and Holders: Wall, Floor and Overhead Types

A door stop prevents a door from swinging open far enough to contact the wall, adjacent hardware, or the door closer arm. The choice between wall stop, floor stop, and overhead stop depends on the door's swing path, the floor and wall construction, and whether hold-open function is also needed.

Wall Stops

A wall stop mounts on the wall surface in the path of the door edge or the door handle. It is the simplest and least expensive door stop specification and is correct for most standard interior doors where the wall behind the open door is accessible and structurally sound enough to accept fasteners. Hager 210 rigid base and Hager 211 flexible base wall stops are stocked at American Locksets. The Hager 211 flexible base absorbs impact energy through a rubber-backed plate before it reaches the wall, which reduces the noise and potential damage from frequent door contact in high-traffic openings.

Floor Stops

A floor stop mounts on the floor in the path of the door edge or door base. Floor stops are specified when the wall behind the open door is not accessible, when the door swings past a wall corner, or when the door opens into a corridor where a wall stop would project into the pedestrian path. Hager floor stops, including dome stops and rigid-post configurations, cover standard commercial floor stop applications at American Locksets. The dome stop profile is the standard specification because the low-profile dome shape is less likely to catch foot traffic than a post-type stop and is easier to clean around in high-traffic environments.

Overhead Stops and Holders

An overhead stop mounts in the door frame head and uses an arm connected to the door to limit opening travel. It is specified when neither a wall stop nor a floor stop is practical due to geometry, clearance constraints, or floor material that does not accept anchor fasteners. Overhead stops can include a hold-open function that holds the door open at a set angle without a separate holder device. Overhead stop and holder combinations are useful in high-traffic corridors where the door needs to stay open during peak traffic periods and return to closed at other times without a power operator. All stops and holders at American Locksets ship from the door stops and holders section.

Flush Bolts: Manual, Automatic and Constant Latching

Flush bolts secure the inactive leaf of a double door by projecting steel rods into strikes at the top of the door frame header and at the floor. Without flush bolts, the inactive leaf would move independently and the active leaf's latch would have nothing to latch against. Flush bolts are one of the most frequently misspecified components in double-door hardware sets, particularly on fire-rated assemblies where the flush bolt type determines both code compliance and operational behavior.

Manual Flush Bolts

A manual flush bolt is operated by hand. The user slides a lever or knob to extend or retract the rod into the header strike and floor strike. Manual flush bolts are acceptable on non-fire-rated double doors and on fire-rated double doors that serve storage or equipment rooms where the occupants actively manage the door state. On fire-rated egress paths, NFPA 101 and IBC generally prohibit manual flush bolts because they require deliberate user action to engage, which means the inactive leaf could remain unlatched if the last person through the door does not manually shoot the bolt. Ives and Hager manual flush bolts for hollow metal and aluminum door applications are stocked at American Locksets in the manual flush bolts section.

Automatic Flush Bolts

An automatic flush bolt projects its rods automatically when the active leaf closes. When the active leaf swings shut, it contacts a trigger on the inactive leaf flush bolt, which causes the bolts to extend into the header and floor strikes. When the active leaf opens, the bolts retract automatically, freeing the inactive leaf. The occupant does not take any deliberate action to secure or release the inactive leaf. This automatic operation is why automatic flush bolts are required on most fire-rated egress double doors. NFPA 101 and IBC require that the inactive leaf latch automatically so that occupants do not need to manually secure the door during evacuation. A coordinator is required whenever automatic flush bolts are used, because the inactive leaf must close before the active leaf engages the triggers.

Constant Latching Flush Bolts

A constant latching flush bolt has an automatic bolt at the bottom of the inactive leaf and a spring-loaded manual bolt at the top that remains engaged until manually retracted. The bottom bolt operates automatically on active leaf closing, while the top bolt is manually retracted when the inactive leaf needs to be opened. This configuration provides higher security than standard automatic flush bolts because the inactive leaf is positively bolted at the top even when the active leaf is open. The trade-off is that the top bolt requires manual operation, which must be accessible within ADA reach range. A coordinator is also required for constant latching applications.

Door Coordinators: The Most Misunderstood Double-Door Component

A door coordinator is a mechanical device mounted under the frame head that controls the closing sequence of a paired door assembly. Its sole function is to ensure the inactive leaf closes before the active leaf on every cycle. This sequencing is required whenever the inactive leaf has automatic flush bolts, constant latching flush bolts, or an overlapping astragal, because all three conditions require the inactive leaf to be in position before the active leaf closes and latches.

Without a coordinator, both leaves close simultaneously or in random sequence depending on which one the person released last. If the active leaf closes before the inactive leaf's bolts engage the strikes, the active leaf latches against an unsecured partner. On fire-rated assemblies, this means both leaves are not positively latched, which is a NFPA 80 violation that will fail a fire door inspection. On non-rated assemblies, it means the inactive leaf does not close fully, leaving a gap at the meeting stile that defeats the purpose of the double door configuration.

The coordinator works by holding the active leaf open with a release arm until the inactive leaf is fully closed and latched. As the inactive leaf swings into its strike and the bolts engage, the coordinator releases the active leaf to close. The mechanism is purely mechanical and operates on every cycle without any power or programming. Hager flush bolt and coordinator sets are stocked at American Locksets for standard commercial double-door applications. When specifying coordinators, always confirm leaf width and handing because the coordinator arm must be mounted to hold back the correct leaf. Unequal-leaf pairs require particular attention to ensure the wider leaf closes first and the coordinator geometry matches the specific leaf configuration. The complete flush bolts and coordinators range is available alongside keypad and proximity locks and the full hardware line at American Locksets.

The Coordinator Sequencing Error That Fails Fire Door Inspections

The most consistent builders hardware error on double-door projects is installing a coordinator on the wrong leaf, or installing automatic flush bolts without a coordinator at all. Both produce the same visible symptom: the active leaf closes into an unsecured inactive leaf, leaving a visible gap at the meeting stile and creating a latch binding condition that prevents both leaves from positively latching.

Here is exactly what happens when the sequence is wrong. A double fire door is installed with automatic flush bolts on the inactive leaf and a coordinator. The coordinator arm is inadvertently mounted to hold back the inactive leaf rather than the active leaf. Now the coordinator is holding back the inactive leaf, which is the leaf that needs to close first. The active leaf closes first instead. The active leaf latch engages the active leaf strike, but the inactive leaf's automatic flush bolts never received the trigger signal from the active leaf closing because the active leaf arrived before the inactive leaf was in position. The inactive leaf sits ajar. The inspector checks the double door assembly, finds both leaves not positively latched, and the entire assembly fails NFPA 80 compliance.

The field fix is simple once the diagnosis is correct: reverse the coordinator arm to hold back the active leaf instead of the inactive leaf. But the diagnostic step is where installations stall. Coordinators are not well-understood in the field, and a symptom that looks like a strike adjustment problem or a flush bolt rod length problem is often actually a coordinator mounting error. American Locksets includes coordinator mounting orientation guidance with every double-door hardware order that includes automatic flush bolts. Call 877-471-4870 before ordering any double-door set where the coordinator mounting orientation is unclear.

Door Silencers and Surface Bolts

Door silencers are small rubber or neoprene buttons pressed into holes in the door frame stop. When the door closes, the silencer contacts the door face and prevents the metal-to-metal impact that produces the sharp slamming sound on hollow metal door assemblies. The standard commercial specification is three silencers per single door: two on the strike jamb and one on the hinge jamb. On fire-rated doors, silencers must be listed for fire door use. Standard catalog silencers that are not fire-listed do not belong on rated assemblies regardless of how minor the component seems.

Surface bolts are manually operated bolts that slide horizontally across the door face to engage a strike on the door frame or floor. They are used to secure inactive leaves that do not require the automatic operation of flush bolts, for doors requiring a secondary security function beyond the primary lockset, and for gates and cabinet doors. NFPA 101 and IBC limit surface bolt use on fire-rated egress doors to storage and equipment room applications where the occupant count and egress requirements permit manual operation of the inactive leaf.

Why Choose American Locksets for Builders Hardware

American Locksets has been an authorized commercial hardware distributor since 2001, stocking builders hardware from Ives, Hager, Cal-Royal, and other leading brands across the full range of protective plates, door stops, flush bolts, and coordinators. The complete builders hardware catalog, including kick plates, mop plates, push plates, armor plates, wall and floor stops, manual and automatic flush bolts, coordinators, surface bolts, and door silencers, is in the builders hardware section at American Locksets. Same-day shipping on stocked configurations.

Builders hardware at American Locksets ships alongside commercial mortise locks and lever sets, commercial door hinges, commercial door closers, exit devices and panic hardware, and continuous geared hinges on a single authorized dealer order. For help specifying the correct flush bolt type, coordinator configuration, or protective plate gauge for a specific project, call 877-471-4870 before ordering.

Frequently Asked Questions About Builders Hardware

What is the difference between a kick plate, mop plate, and armor plate?

All three are protective plates that mount on the push side of a door to shield the door face from impact damage. A mop plate is 4 to 6 inches tall and used where mop heads contact the door base in janitorial areas. A kick plate is 6 to 16 inches tall and used in standard commercial corridors and entries to protect against foot and cart impact. An armor plate extends from near the floor to 34 to 48 inches tall, covering the entire lower door face and eliminating the gap between kick and push plate protection. Armor plates are the standard specification for hospital corridors, school cafeterias, and high-abuse institutional environments.

When is a door coordinator required?

A coordinator is required on any paired door assembly where the inactive leaf has automatic flush bolts, constant latching flush bolts, or an overlapping astragal. These conditions require the inactive leaf to close before the active leaf. Without a coordinator enforcing this sequence, both leaves close in random order and the inactive leaf may not latch before the active leaf engages, leaving both leaves unsecured. On fire-rated paired doors, a failing closing sequence is a NFPA 80 violation that fails fire door inspection.

What is the difference between manual, automatic, and constant latching flush bolts?

A manual flush bolt requires the user to slide a lever or knob to extend and retract the rods. Acceptable on non-fire-rated double doors and storage room fire doors. An automatic flush bolt extends and retracts automatically based on whether the active leaf is open or closed. Required on most fire-rated egress double doors where NFPA 101 and IBC require the inactive leaf to latch without user action. A constant latching flush bolt has an automatic bottom bolt and a manually retracted top bolt, providing higher security than fully automatic bolts but requiring manual operation to open the inactive leaf.

What gauge kick plate should I specify for a commercial door?

Standard commercial kick plates are 0.050 inch (18 gauge) stainless steel, which is the correct specification for most commercial corridor and entry doors with normal cart and foot traffic. For high-abuse environments such as hospital corridors, school cafeterias, and loading areas with heavy cart traffic, specify 0.125 inch (10 gauge) heavy-duty kick plates that provide approximately 2.5 times the dent resistance of standard gauge. The standard commercial finish is US32D satin stainless, which resists corrosion, cleans easily, and matches common hardware schedules.

Are kick plates required on fire-rated doors?

Kick plates are not universally required on fire-rated doors, but when they are specified on a fire-rated assembly, they must carry a UL listing for fire door use under NFPA 80 Section 6.4.5.1. Standard unlisted kick plates are not acceptable on fire door assemblies regardless of their size or position on the door. The same requirement applies to push plates, pull plates, and armor plates on rated assemblies. When specifying any protective plate on a fire door, confirm the product's fire door listing before ordering.

What are door silencers and where do they go?

Door silencers are small rubber or neoprene buttons pressed into holes in the door frame stop that prevent metal-to-metal contact when a hollow metal door closes. The standard commercial specification is three silencers per single door: two on the strike jamb stop and one on the hinge jamb stop. On fire-rated doors, silencers must be listed for fire door use. Non-listed silencers are not acceptable on rated assemblies. Silencers significantly reduce door slam noise in occupied commercial buildings and extend the life of the door face finish at the contact point.

Which builders hardware brands does American Locksets carry?

American Locksets stocks builders hardware from Ives (8400 Series kick plates, mop plates, push plates, flush bolts, coordinators, stops), Hager (kick plates, floor stops, wall stops, flush bolt and coordinator sets), and Cal-Royal (protective plates and door trim). Manual flush bolts are available from Ives, PDQ, Hager, and Rockwood. Same-day shipping on stocked configurations. The complete catalog is in the builders hardware section at American Locksets with specification support at 877-471-4870.

A commercial lever lock looks like a clear product. It has a lever handle, a cylinder, and a latch. But the function code on the order form, a two- or three-character designation most buyers barely glance at, determines exactly how that door behaves: which side is always locked, whether a key locks or unlocks from either direction, what happens in a fire, and whether the installation passes code inspection. Getting the function wrong on a commercial lever lock order is one of the most common and costly mistakes in commercial hardware. The lock body arrives, the installer puts it on the door, and then someone realizes the outside lever is always free when it should require a key, or the classroom can be locked from inside when the fire marshal says it cannot. Returning and reordering a commercial lever lock that was already installed typically costs more in labor than the hardware itself. This guide covers the complete specification picture: ANSI grading and what it means for real applications, the function codes that control door behavior, backset and handing, the major product lines stocked at American Locksets, and the one specification error that generates more returns than any other.

What Is a Commercial Lever Lock?

A commercial lever lock is a cylindrical lockset, meaning it installs in a standard bored door preparation consisting of a 2-1/8-inch cross-bore through the door face and a latch bore through the door edge. The lock body sits inside the door, the lever rose mounts on the door face, and the lever handle extends from the rose. The latch bolt engages the strike plate in the door frame when the door closes. On keyed functions, a cylinder in the outside lever controls whether entry is possible from the exterior. On the interior, the lever operates freely or through a turn-button or push-button depending on the specific function.

Commercial lever locks differ from residential lever sets in construction standard, cycle rating, material quality, and cylinder security. The critical distinction is the ANSI/BHMA grading system that sets the performance floor for every commercial lever lock specification.

ANSI Grades: What Grade 1, Grade 2, and Grade 3 Mean for Commercial Applications

ANSI/BHMA A156.2 establishes three performance grades for bored cylindrical locks. Every commercial lever lock must be graded before it can be specified on a commercial project with any confidence in its service life.

Grade 1: Commercial and Institutional Standard

Grade 1 is the specification for schools, hospitals, government facilities, office buildings, and any high-traffic commercial installation. To earn Grade 1 certification, a cylindrical lever lock must survive 250,000 open-close cycles without mechanical failure, withstand a minimum of 360 inch-pounds of torque applied to the locked lever without gaining entry, pass independent testing for pick and drill resistance, and meet latch bolt force requirements. On a high school corridor door cycling 400 times per day, a Grade 1 lock delivers roughly 600 days of rated service life before reaching the tested cycle threshold. In practice, well-maintained Grade 1 commercial lever locks from major manufacturers routinely last decades in institutional settings.

Schlage ND Series, Corbin Russwin CL3100 and CL3500 Series, and Sargent 10G Series are the primary Grade 1 cylindrical lever locks stocked at American Locksets. Corbin Russwin CL3100 Series specifies 3,000 inch-pounds of torque resistance on the locked lever, more than eight times the Grade 1 ANSI minimum. Schlage ND Series significantly exceeds Grade 1 cycle requirements and withstands 3,100 inch-pounds of lever torque in testing.

Grade 2: Light Commercial

Grade 2 requires 150,000 cycles and 250 inch-pounds of torque resistance. This grade is appropriate for lower-traffic interior commercial doors: interior office doors with moderate use, storage rooms on upper floors of low-traffic buildings, and light-commercial retail interior applications. Tell and Cal-Royal Grade 2 cylindrical lever locks fill this specification tier at American Locksets. Grade 2 hardware on a high-traffic corridor door will fail before its time. The financial case for Grade 1 over Grade 2 on any door seeing more than 100 cycles per day is simply the avoided replacement cost.

Grade 3: Residential Only

Grade 3 requires 150,000 cycles and 150 inch-pounds of torque resistance. Nothing in the American Locksets commercial lever lock catalog is Grade 3. If a residential-grade lever lock ends up on a commercial project through a procurement shortcut, it will fail under commercial use and may not satisfy the authority having jurisdiction during inspection.

Commercial Lever Lock Function Codes: The Specification Decision That Controls Door Behavior

Every cylindrical lever lock ships with a function designation that defines how the door operates. ANSI/BHMA assigns standard function numbers used across all manufacturers, though each manufacturer also uses their own model number suffix to denote the same function. Understanding the ANSI function number means you can specify correctly regardless of which brand is on the project.

Passage (F75): No Locking

The latch retracts by lever from either side at all times. No cylinder, no key, no locking. This function is for interior doors that simply need to stay closed without any access restriction: hallways, open-plan office divisions, break room doors. A passage set on a door that needs any security is an open door to anyone who reaches for the handle.

Privacy (F76): Interior Lock, Emergency Release

Interior lever or push-button locks the outside lever. Emergency release on the outside, typically a small slot for a coin or flat tool, unlocks the door for emergency access. The correct function for single-occupancy restrooms, private offices, and any door where temporary privacy is needed without a key. The emergency release distinguishes this from a storeroom function and is a code requirement in most occupancies for any door that can be locked from inside.

Entry / Office (F82): Push-Button Interior Control

Interior push-button locks and unlocks the outside lever. Key from outside retracts the latch when the outside lever is locked. Inside lever always free. This is the most common function for office suite entries, tenant doors, and any commercial interior entry where the occupants control access from inside. The push-button hold feature means the door can be left unlocked during business hours and secured after hours without a key from inside.

Classroom (F84): Always Locked, Key Controls From Outside Only

Outside lever is always locked. Key from outside locks or unlocks the outside lever. Inside lever always free for immediate egress. The outside lever cannot be locked or unlocked from inside. This is the correct function for K-12 classroom doors, where the teacher locks the door from outside with a key during a lockdown drill or security event without entering the room. It is not the function for a door where the occupant inside needs to be able to lock the door from inside, which describes many administrators' offices incorrectly specified with classroom function.

Classroom Intruder / Security (F110): Lockdown From Either Side

Outside lever locked or unlocked by key from either side. Inside lever always free for egress. This function is specified on newer school projects where a teacher inside the classroom needs the ability to lock the outside lever from inside without opening the door. Unlike the standard classroom function where only the outside key controls the lever state, the F110 function allows locking from inside with a key. Corbin Russwin designates this as the CL3152 Classroom Intruder function. Schlage designates it as ND78 (ANSI F110). This is a critical distinction for school security specifications.

Storeroom / Closet (F86): Always Locked From Outside

Outside lever always rigid. Entry by key only from outside at all times. Inside lever always free for immediate egress. No push-button or turn-button hold feature. This function is correct for mechanical rooms, electrical rooms, storage rooms, janitor's closets, and any restricted area where the door should always require a key from outside. A common misspecification is ordering an office function (F82) for a storeroom, which allows the occupants to leave the door unlocked indefinitely by not pressing the inside push-button.

Corridor / Dormitory (F90): Toggle Key Control

Inside lever or key from outside locks and unlocks the outside lever. Outside lever can be left unlocked during open hours and locked after hours without a key from inside. Inside lever always free. This function covers dormitory corridors, apartment entries, and multi-tenant residential or healthcare facilities where the lock state needs to be controllable from either side with a key.

Backset and Door Preparation

Backset is the distance from the edge of the door face to the center of the cross-bore. Standard commercial backset is 2-3/4 inches. This is the default shipped configuration on every major commercial lever lock series. A 2-3/8-inch backset is available for doors with narrow stiles or specific aluminum storefront preparations where the standard 2-3/4-inch backset would place the cylinder too close to the door edge. Ordering the wrong backset on a retrofit creates a misalignment between the latch and the strike that requires either a new lock order or a door modification.

On retrofit projects, measure the existing backset before ordering. The measurement is simple: with the door open, measure from the edge of the door to the center of the existing cross-bore. If the number is 2-3/4 inches, order standard. If it is 2-3/8 inches, specify the 2-3/8-inch backset option. Some manufacturers offer 3-3/4-inch and 5-inch backset options for oversized stile applications, but these are not standard stock items and carry longer lead times.

Door thickness for standard commercial cylindrical lever locks ranges from 1-3/4 inch to 2-1/8 inch on most Grade 1 models. Corbin Russwin CL3100 Series accommodates 1-3/4 inch to 2 inch standard, with an optional extension for 2 inch to 2-1/4 inch doors. Verify door thickness on any non-standard application before ordering.

Handing: The Ordering Detail That Generates the Most Returns

Most commercial Grade 1 cylindrical lever locks are non-handed, meaning the same lock body installs on left-hand or right-hand doors and the lever direction adjusts during installation. This is true for Schlage ND Series, Corbin Russwin CL3100 and CL3500 Series, and Sargent 10G Series. However, some lever trim options and specialized functions are handed and must be ordered correctly.

The standard handing determination rule: stand on the outside of the door (the key side) and observe the hinge position. If the hinges are on your right, the door is right-hand. If the hinges are on your left, the door is left-hand. In-swing and out-swing doors with the same hinge position are specified differently on some functions. For most standard commercial installations with non-handed lock bodies, handing at the lock body level is not an ordering concern. But the lever style must be confirmed because some aesthetic lever options carry handing requirements that are not always visible in the product listing.

The practical advice for any commercial lever lock project: confirm with the supplier whether the specific lever style on the order is non-handed or handed before the order ships. One phone call before shipping prevents a return shipment and a project delay. American Locksets confirms handing requirements before shipping commercial lever lock orders. Call 877-471-4870 for any retrofit or new construction order where handing is a concern.

The Major Commercial Lever Lock Series at American Locksets

American Locksets stocks commercial lever locks from Schlage, Corbin Russwin, Sargent, Arrow, Cal-Royal, and Tell from authorized distribution. Here is how the primary Grade 1 product lines align with commercial applications.

Schlage ND Series

The Schlage ND Series is the most widely specified Grade 1 cylindrical lever lock in the United States. The ND offers 27 mechanical functions covering every application from passage through classroom security intruder, across nine lever styles and nine standard finishes. It significantly exceeds Grade 1 cycle and torque requirements and carries UL 3-hour fire rating across the product line. SFIC, LFIC, and conventional cylinder configurations are available, allowing the ND to integrate into Schlage Everest, Schlage Primus restricted, and competitive IC core programs from Best, Corbin Russwin, Sargent, and Yale. The Vandlgard option on select ND functions adds an anti-torque clutch that disengages the outside lever spindle from the latch mechanism when the lock is secured, preventing vandals from damaging the lock body by applying excessive force to the locked lever. All Schlage commercial lever locks are stocked at American Locksets from authorized distribution.

Corbin Russwin CL3100 and CL3500 Series

The Corbin Russwin CL3100 Series is specified on institutional projects where torque resistance and long-term durability are the primary requirements. The T-Zone construction uses true interlocking between the lock body and the latch assembly, providing 3,000 inch-pounds of torque resistance on the locked lever. The CL3100 covers all standard cylindrical functions including the CL3152 Classroom Intruder F110 function for school security applications. The CL3500 Series is the heavy-duty variant for the most demanding institutional applications. Both series accept Corbin Russwin interchangeable core options as well as SFIC cross-compatibility with Sargent and Yale under the ASSA ABLOY key system. The complete Corbin Russwin lever lock line is in the commercial locks catalog at American Locksets.

Sargent 10G Series

The Sargent 10G Series is the Grade 1 cylindrical lever lock in the Sargent product family and is frequently specified alongside Sargent 8200 Series mortise locks on projects where corridor doors use cylindrical hardware and high-security entries use mortise hardware. The 10G carries the same lever and rose aesthetic options as the 8200 Series, providing a consistent appearance across a building's hardware schedule. Sargent's SFIC configuration on the 10G is cross-manufacturer compatible with Yale and Corbin Russwin cores under the same masterkey hierarchy, which simplifies campus-wide key programs across mixed hardware schedules. The Sargent commercial lever locks are available at American Locksets from authorized distribution.

Arrow and Cal-Royal Lever Locks

Arrow lever locks provide a solid Grade 1 cylindrical option at a more accessible price point for commercial projects where full institutional-grade specifications are not required but Grade 1 performance is. Cal-Royal covers both Grade 1 and Grade 2 cylindrical lever locks for applications ranging from heavy commercial through light commercial interior doors. Tell lever locks cover Grade 2 applications where budget is the primary specification driver and traffic levels do not justify institutional Grade 1 hardware. All three brands are in the commercial lever locks section at American Locksets.

The Function Code Ordering Error Nobody Warns You About

The most common commercial lever lock return at American Locksets is a classroom function lock ordered for a door that actually needs a classroom intruder function, or an entry/office function ordered for a storeroom because the buyer did not read the function description and assumed "office" meant any door in an office building.

The distinction between classroom F84 and classroom intruder F110 matters enormously in school security contexts. The F84 classroom function cannot be locked from inside. A teacher inside a classroom with an F84 lock cannot secure the door without opening it, stepping into the corridor, using the key on the outside lever, and stepping back inside. In an active threat situation, this sequence is not acceptable. The F110 classroom intruder function solves this by allowing a key in the inside lever to lock the outside lever without opening the door. If a school district specifies F84 locks on classroom doors and later upgrades to an active shooter response protocol that requires interior lockdown capability, every lock in the building must be replaced. Ordering F110 locks from the beginning costs nothing extra per unit.

Before ordering any commercial lever lock for an educational facility, confirm whether the security protocol requires interior lockdown capability. If yes, specify F110 or the equivalent manufacturer designation: Corbin Russwin CL3152, Schlage ND78, or Sargent equivalent. Call 877-471-4870 and American Locksets will confirm the correct function code for the application before the order ships.

Why Choose American Locksets for Commercial Lever Locks

American Locksets has been an authorized commercial hardware distributor since 2001, stocking Grade 1 cylindrical lever locks from Schlage, Corbin Russwin, Sargent, Arrow, Cal-Royal, and Tell from authorized distribution. Every commercial lever lock ships with full manufacturer warranty. Same-day shipping is available on stocked configurations across all major function codes and finishes.

Commercial lever locks at American Locksets ship alongside commercial mortise locks and deadbolts, exit devices and panic hardware, commercial door closers, commercial door hinges, and builders hardware on a single authorized dealer order. For help confirming the correct function code, ANSI grade, backset, IC core prep, or lever style for a specific project or retrofit application, call 877-471-4870 before ordering.

Frequently Asked Questions About Commercial Lever Locks

What is the difference between a Grade 1 and Grade 2 commercial lever lock?

ANSI/BHMA Grade 1 lever locks are tested to 250,000 open-close cycles and must withstand a minimum of 360 inch-pounds of torque on the locked lever. Grade 2 is tested to 150,000 cycles with 250 inch-pounds of torque resistance. Grade 1 is the correct specification for schools, hospitals, offices, and any high-traffic commercial installation. Grade 2 is appropriate for lower-traffic interior commercial doors in light commercial settings. Using Grade 2 on a high-traffic corridor door will result in premature failure and early replacement cost.

What is a function code on a commercial lever lock?

A function code, defined by ANSI/BHMA standards, describes how the lever lock operates: which side is keyed, whether the outside lever is always locked or controlled by a push-button or key, whether the inside lever is always free, and how the lock interacts with egress requirements. Common functions include passage (no locking), privacy (interior button lock), entry/office (push-button control from inside), classroom (always locked, outside key only), storeroom (always locked, key entry always required), and classroom intruder (lockdown from either side with a key). Getting the function wrong means the door does not behave as the application requires.

What is the difference between classroom function F84 and classroom intruder F110?

A classroom function F84 lock keeps the outside lever always locked and can only be unlocked from outside with a key. It cannot be locked from inside the room without opening the door. A classroom intruder F110 lock allows the outside lever to be locked from either side using a key, meaning a teacher inside the room can lock the door without opening it. For school security protocols requiring interior lockdown capability, F110 is the correct specification. Corbin Russwin designates this as CL3152, Schlage as ND78.

What is standard backset for a commercial lever lock?

Standard commercial backset is 2-3/4 inches, measured from the edge of the door face to the center of the cross-bore. This is the default configuration on all major commercial Grade 1 lever lock series. A 2-3/8-inch backset is available for narrow-stile doors or specific aluminum frame applications. Always measure the existing backset on retrofit projects before ordering. Installing a 2-3/4-inch backset lock on a door prepped for 2-3/8 inches creates a latch-to-strike alignment problem that requires a new lock or door modification to correct.

Are commercial lever locks non-handed?

Most commercial Grade 1 cylindrical lever lock bodies are non-handed, meaning they install on both left-hand and right-hand doors. Schlage ND Series, Corbin Russwin CL3100 and CL3500 Series, and Sargent 10G Series are all non-handed at the lock body level. However, some lever trim options are handed and must be specified correctly. Always confirm with the supplier whether the specific lever style ordered requires handing before the order ships to avoid a return.

Can commercial lever locks integrate with an interchangeable core key program?

Yes. Schlage ND Series, Corbin Russwin CL3100 and CL3500 Series, and Sargent 10G Series all offer SFIC (small format interchangeable core) and LFIC (large format interchangeable core) configurations. SFIC allows cores to be removed and replaced with a control key without disassembling the lock, which simplifies rekeying across large facilities during personnel changes. Cross-manufacturer SFIC compatibility means a campus running Sargent, Corbin Russwin, and Yale locks can operate under a single interchangeable core masterkey hierarchy.

Which commercial lever lock brands does American Locksets carry?

American Locksets stocks Grade 1 commercial lever locks from Schlage (ND Series), Corbin Russwin (CL3100 and CL3500 Series), Sargent (10G Series), and Arrow from authorized distribution. Grade 2 options from Cal-Royal and Tell are also available for lighter-duty interior applications. Same-day shipping is available on stocked functions and finishes. The complete catalog is in the commercial locks section at American Locksets, with full specification support by phone at 877-471-4870.

Keyless entry for commercial doors falls into three categories that look similar on the surface but operate on completely different principles, carry different costs, and suit different applications. A mechanical pushbutton lock runs without power and never needs programming. An electronic keypad lock runs on batteries, stores user codes, and in most commercial-grade models logs every entry with a time and date stamp. A proximity reader system issues physical credentials and integrates with broader access control infrastructure. Picking the wrong category for a given door creates a lock that either provides less security than the application requires or adds complexity and maintenance cost the facility cannot sustain. This guide covers all three categories, the products stocked at American Locksets, and the specification decisions that separate a successful installation from a callback six months later.

What Are Keypad and Electronic Access Locks?

Keypad and electronic access locks replace the physical key as the primary credential with a numeric code, a proximity card or fob, or a combination of both. The person approaching the door enters a PIN, presents a credential, or both, and the lock releases the latch mechanically or triggers an electric solenoid depending on the product type. Inside egress, as with all commercial locks, remains free through the lever at all times.

The practical appeal for commercial facilities is clear. When an employee leaves or a tenant changes, a code can be deleted or changed in seconds at the lock keypad. No locksmith, no rekeying, no new keys to cut and distribute. For facilities with high staff turnover, multiple shifts, or frequent contractor access, that operational advantage pays for the hardware premium within the first year of ownership. For facilities where audit trail documentation is required for compliance, HIPAA, or insurance purposes, an electronic keypad lock with a logged audit trail provides evidence of who entered a specific door at a specific time, which a mechanical keyed lock cannot provide at any price.

The Three Categories: Mechanical Pushbutton, Electronic Keypad and Proximity

Understanding how these three categories differ is the first and most important step in any specification.

Mechanical Pushbutton Locks

A mechanical pushbutton lock operates entirely without electricity. The user presses a sequence of numbered buttons in the correct order and the latch retracts mechanically. No batteries, no programming software, no audit trail, no connectivity. One combination controls the lock. Changing the combination requires a brief mechanical procedure at the lock body itself, typically involving a reset tool or a key-controlled reset sequence depending on the manufacturer.

This category's primary advantage is absolute reliability. The lock cannot fail because of a dead battery, a software bug, a corrupted credential database, or a power outage. In mechanical rooms, server rooms, rooftop access points, telecom closets, and any location where an electronic failure during critical operations would be a significant problem, a mechanical pushbutton lock is frequently the correct specification. It is also the correct choice for remote locations that are rarely visited and where battery maintenance would be impractical.

The limitation is access management. Every person who needs access to the door must know the combination. When the combination is compromised, every authorized user must be notified of the new combination simultaneously. There is no way to grant access to one person without granting it to everyone who knows the code. And there is no audit trail. If the question is ever "did anyone enter this room on Tuesday at 3 PM," the mechanical pushbutton lock has no answer. American Locksets stocks mechanical pushbutton locks in the keypad and proximity locks section.

Electronic Keypad Locks

An electronic keypad lock runs on batteries, typically five AA cells on commercial-grade models, and stores multiple individual user codes in its internal memory. Each user gets a unique code. When that code is entered at the keypad, the lock releases and the event is logged in the audit trail with the user identifier, the time, and the date. Codes can be added or deleted at the keypad without touching the physical hardware on the door. Scheduled access windows can be programmed so a cleaning crew's code only works between specific hours. Automatic lockout after multiple failed PIN attempts provides protection against code-guessing attacks.

The commercial standard in this category is the Alarm Lock Trilogy series. The DL2700 stores 100 user codes and logs 40,000 audit events. The DL3200 handles 2,000 users with the same 40,000-event audit trail. The DL2700 and DL3200 are cylindrical lockset format, replacing a standard commercial cylindrical lever set with no door modification. The DL2700CR and DL3500 series cover mortise lock applications. All Trilogy locks use a Grade 1 all-metal weatherproof keypad and run approximately three years on five AA batteries under typical commercial use. The clutch mechanism on the outside lever is a key detail: the lever rotates freely when the code has not been entered, which means a frustrated user cannot force the lock open by applying torque to the lever. The lock only engages the latch retraction mechanism after a valid code.

Electronic keypad locks in this category are standalone, meaning they do not connect to a network or report to a central access control server in real time. Audit trail retrieval requires a physical connection using the Alarm Lock Data Transfer Module (DTM) or the PC interface cable with DL-Windows software. For facilities where real-time monitoring is not required and periodic audit retrieval is acceptable, standalone electronic keypad locks are the most cost-effective managed access solution available.

Proximity Card and Credential Locks

Proximity credential systems issue physical credentials, most commonly a card or fob, that the user presents to a reader. The reader validates the credential and the door releases. At the commercial level, proximity systems typically allow the same user management flexibility as electronic keypad locks, individual credential assignment, access schedules, audit trails, and instant credential deactivation, but with a fundamentally different user experience. The user does not need to remember a PIN. They carry a credential. This is the appropriate choice for facilities with large user populations, high turnover, or shift-based access where code management becomes impractical at scale.

A critical specification decision that most guides skip entirely: the difference between 125kHz proximity technology and 13.56MHz smart card technology. Legacy 125kHz proximity cards transmit an unencrypted card number in one direction only. The data never changes. Cloning devices that copy a 125kHz card are widely available for under $50 and take seconds to operate. A person with a cloner standing near a legitimate cardholder in a lobby or elevator can silently copy that credential. The cloned card is indistinguishable from the original at the reader. This is not a theoretical vulnerability. It is a documented attack vector used in physical penetration testing of commercial facilities routinely. For any application where credential security matters, 125kHz proximity is not an acceptable technology. The current commercial standard is 13.56MHz smart card technology, such as HID iClass SE, MIFARE DESFire EV2, and SEOS, which uses encrypted mutual authentication. Cloning a 13.56MHz smart card requires breaking AES-128 encryption, which is not a practical attack for commercial-level adversaries. When specifying proximity locks, always confirm whether the reader supports 13.56MHz smart card technology before ordering.

American Locksets stocks proximity credential locks from Alarm Lock, Dormakaba, and Cal-Royal. The Alarm Lock PDL3000 series combines PIN and HID-compatible 125kHz proximity reading in a single cylindrical lock body. Dormakaba Eplex series covers keypad and proximity in both cylindrical and mortise formats. The full selection is at keypad and proximity locks catalog.

Standalone vs. Networked: What Changes at Scale

Standalone electronic keypad and proximity locks work excellently for facilities with a limited number of controlled doors and a stable user population. When the facility grows beyond roughly 10 to 15 controlled doors, or when real-time credential management becomes necessary, the limitations of standalone architecture begin to create operational problems.

On a standalone lock, adding a new user means physically visiting each lock and entering the new code or enrolling the new credential at the keypad. Deleting a user who has left the organization requires the same physical visit to every door that person could access. For a single door, this takes two minutes. For 30 doors, it takes an afternoon and relies on someone remembering which doors the departing employee had access to. An employee can retain access to every door anyone forgot to update until someone audits the credential lists manually.

Networked electronic access systems, such as the Alarm Lock Trilogy Networx series, solve this by connecting locks to a central gateway over a wireless or wired network. Changes made at the central access control software propagate to every connected lock automatically. A departing employee's credentials are revoked across the entire facility in seconds from a single workstation, without anyone visiting a door. The Alarm Lock Networx system supports up to 2,000 locks per system through gateway modules, each covering up to 63 locks within a 900-foot clear-field wireless range. Audit trail data downloads automatically to the central server without requiring someone to physically connect to each lock.

For facilities with 1 to 10 controlled doors, standalone is almost always the right answer. For facilities with more than 15 doors, frequent user changes, or compliance requirements for real-time audit data, networked access control pays for itself rapidly in reduced administration labor. American Locksets stocks Alarm Lock Trilogy Networx products and accessories including the gateway modules and PC software needed for networked system deployment in the keypad and proximity locks section.

Keypad Lock Formats: Cylindrical, Mortise and Exit Trim

Electronic keypad and proximity locks are available in the same physical formats as standard commercial mechanical locks. The format must match the existing door preparation.

Cylindrical Keypad Locks

Cylindrical keypad locks replace a standard commercial cylindrical lever set in a 2-1/8-inch cross-bore door prep. Installation uses the same door preparation as any standard cylindrical lock, making retrofits on existing commercial doors fast and requiring no door modification. The Alarm Lock Trilogy DL2700 and DL3200 are the primary cylindrical format electronic keypad locks stocked at American Locksets. Both accept optional SFIC cylinder cores for integration with an existing interchangeable core key program.

Mortise Keypad Locks

Mortise keypad locks replace a standard commercial mortise lock in an existing mortise door preparation. They provide the same heavy-duty security and full function range as a mechanical mortise lock, with electronic keypad access added at the trim level. The Alarm Lock DL2700CR and DL3500 series cover mortise lock functions in the Trilogy platform. Dormakaba Eplex 2000 Series and 5000 Series mortise keypad locks cover a wide range of mortise functions including single-sided, double-sided, and deadbolt configurations with IC core options for Schlage, Best, and Corbin interchangeable core compatibility. For facilities running mortise locks throughout the building, the Dormakaba Eplex 5000 Series provides the correct mortise body with electronic keypad trim at the door.

Keypad Exit Trim

Keypad exit trim mounts on the outside of a door equipped with a panic exit device, providing electronic access control from the exterior while the inside push bar operates the exit device mechanically. The Dormakaba Eplex 2000 Series exit trim covers rim, mortise, and SVR exit devices with 100 user codes and a 1,000-event audit trail. Alarm Lock ETDLN Networx exit trim with pushbutton covers rim exit devices with a 2,000-user capacity and 40,000-event audit trail in the networked Trilogy platform. These are specified on exterior commercial entries where panic hardware is required on the egress side but electronic credential control is needed from the exterior.

Key Considerations Before Ordering

Several specification decisions affect the final product selection and must be confirmed before the order ships.

User capacity and audit trail depth determine which Trilogy model is correct. The DL2700 handles 100 users with 40,000 events. The DL3200 handles 2,000 users with the same audit depth. A facility with 80 regular users and some seasonal access does not need the DL3200. A school district with 300 staff using a single building entry does.

IC core compatibility determines which cylinder prep to order. Alarm Lock Trilogy locks are available in SFIC prep for BEST, Schlage, and other IC core programs. If the building runs a Schlage interchangeable core key program, the keypad lock must be ordered with the Schlage IC prep to accept the existing cores. Ordering the wrong cylinder prep means the mechanical key override does not work with the building's key program.

Backset matters exactly as it does on mechanical locks. Standard commercial backset is 2-3/4 inches. Ordering the wrong backset on a retrofit creates an alignment problem between the latch, the strike, and the door prep. Measure before ordering on any retrofit application.

Battery maintenance is a real operational consideration that facilities consistently underestimate. A standalone electronic keypad lock with five AA batteries lasts approximately three years at 10 cycles per day. At higher traffic volumes, battery life drops proportionally. A door cycling 50 times per day will need battery replacement in under a year. Establish a battery replacement schedule based on the actual anticipated cycle count per door, not the manufacturer's stated maximum battery life which assumes lower traffic.

The Credential Cloning Problem No One Tells Buyers

Most guides on commercial keypad and proximity locks do not address the 125kHz proximity cloning vulnerability at all. Many facilities operating today are running proximity card access control on legacy 125kHz credentials because the readers and cards were specified 10 to 15 years ago and never upgraded. The cards still work at the readers. The system appears to be functioning correctly. But anyone with a sub-$50 cloning device can copy a legitimate card from a building occupant in the proximity of a doorway, elevator, or common area without the cardholder's knowledge or consent. The cloned card will grant access to every door the original card opens.

The fix is not complicated but it requires replacing the credential system. Readers that support 13.56MHz smart card technology, and credentials in a format such as HID iClass SE or MIFARE DESFire EV2, provide mutual authentication where both the card and the reader verify each other using encrypted communication. A cloner cannot copy an iClass SE card because there is no static unencrypted number to copy. The cryptographic exchange between card and reader produces a different authentication token on every read. If a facility is currently running 125kHz proximity access control and the doors are not trivial low-security applications, credential technology upgrade is the most important access control improvement available. American Locksets can help specify the correct reader and credential combination for upgrade projects at 877-471-4870.

Why Choose American Locksets for Keypad and Electronic Access Locks

American Locksets has been an authorized commercial hardware distributor since 2001, stocking electronic keypad and proximity locks from Alarm Lock, Dormakaba, Cal-Royal, and Kaba. The complete keypad and proximity lock catalog, including standalone and networked Alarm Lock Trilogy products, Dormakaba Eplex cylindrical and mortise locks, and mechanical pushbutton options, is in the keypad and proximity locks section. Same-day shipping is available on stocked configurations.

Keypad and proximity locks at American Locksets ship alongside commercial mortise locks and cylindrical lever sets, exit devices and panic hardware, electric strikes for access control integration, and builders hardware on a single authorized dealer order. For help selecting the correct user capacity, IC core prep, format, and proximity credential technology for a specific project, call 877-471-4870 before ordering.

Frequently Asked Questions About Keypad and Electronic Access Locks

What is the difference between a mechanical pushbutton lock and an electronic keypad lock?

A mechanical pushbutton lock operates entirely without power or batteries. It uses a single shared combination and has no audit trail. It is reliable in remote or power-critical locations but cannot track individual access or manage multiple users separately. An electronic keypad lock runs on batteries, stores individual user codes, logs audit events with time and date stamps, and allows codes to be added or deleted without physical rekeying. For facilities that need to track who entered a door and when, or manage access for multiple users independently, electronic keypad is the correct choice.

How many users can an Alarm Lock Trilogy keypad lock hold?

The Alarm Lock Trilogy DL2700 Series stores up to 100 individual user codes with a 40,000-event audit trail. The DL3200 Series stores up to 2,000 user codes with the same 40,000-event audit capacity. Both are cylindrical format Grade 1 locks running on five AA batteries. The DL3200 is the correct specification when user population exceeds 100 or when the facility anticipates growth that would exceed the DL2700's capacity within a reasonable horizon.

What is the difference between standalone and networked electronic keypad locks?

A standalone electronic keypad lock manages users and audit trail data locally at the lock itself. Programming changes require physical access to the lock or a data transfer module connection. A networked lock communicates with a central access control server, allowing credential changes, schedule updates, and audit retrieval from a single workstation. Standalone is appropriate for 1 to 10 doors with stable user populations. Networked systems become the correct choice when facilities grow beyond 15 doors or when real-time credential revocation is a security requirement.

Why is 125kHz proximity card technology a security risk?

Legacy 125kHz proximity cards transmit an unencrypted fixed card number in one direction only. Cloning devices available for under $50 can silently copy a 125kHz card from its legitimate holder without contact. The cloned credential is indistinguishable from the original at the reader and grants identical access. For any door that carries meaningful security requirements, 125kHz proximity is not an acceptable credential technology. The current commercial standard is 13.56MHz smart card technology using encrypted mutual authentication, such as HID iClass SE or MIFARE DESFire EV2, which cannot be cloned by practical commercial-level attacks.

Can electronic keypad locks use an interchangeable core cylinder for key override?

Yes. Alarm Lock Trilogy cylindrical and mortise keypad locks are available with SFIC prep for BEST, Schlage, and other IC core programs, and with LFIC prep for Schlage large-format cores. When ordering a keypad lock for a facility that runs an existing interchangeable core key program, confirm the correct IC prep before ordering. The mechanical key override on an electronic keypad lock uses the same core system as the facility's other locks, allowing the building master key to operate every door including the keypad-controlled ones.

How long do batteries last in a commercial electronic keypad lock?

The Alarm Lock Trilogy DL2700 and DL3200 run on five AA alkaline batteries with a typical service life of approximately three years at moderate commercial use, roughly 10 access events per day. Higher traffic volumes reduce battery life proportionally. A door cycling 50 times daily may need battery replacement in under a year. Most commercial electronic keypad locks provide a low-battery warning at the keypad and some emit audible alerts. Establish a battery replacement schedule based on the door's actual anticipated daily cycle count rather than the manufacturer's maximum rated battery life.

Which keypad and electronic lock brands does American Locksets carry?

American Locksets stocks electronic keypad and proximity locks from Alarm Lock (Trilogy DL2700, DL3200, DL3500, PDL3000 proximity series, and Networx networked products), Dormakaba (Eplex 2000 and 5000 Series in cylindrical, mortise, and exit trim formats), Cal-Royal, and Kaba. Mechanical pushbutton locks are also available. The complete catalog is in the keypad and proximity locks section at American Locksets, with same-day shipping on stocked configurations.

An electric strike is the most cost-effective way to add electronic access control to a commercial door that already has a mechanical lock. It replaces the standard fixed strike plate in the door frame with a motorized unit whose keeper pivots open on command, releasing the door without anyone touching the lock from inside. The person entering presses a button, presents a credential to a card reader, or answers an intercom, and the strike releases. No key required from outside. The inside lever still operates the lock mechanically, so egress is always free. That combination of controlled entry and unimpeded egress makes the electric strike one of the most widely installed access control components in commercial buildings. But it is also one of the most frequently misspecified. A strike ordered for the wrong lockset type will not fit. A fail-secure strike on an egress door is a code violation. A strike installed on a door with high HVAC pressure differential will buzz and fail to release under load, generating service calls that cost more than the hardware. This guide covers everything you need to get the specification right the first time: how electric strikes work, the fail-safe and fail-secure distinction and when each applies, how to match the strike to the lockset type, what the major brands and series cover, and the preload problem that generates more callbacks than any other electric strike installation issue.

What Is an Electric Strike and How Does It Work?

A standard mechanical strike plate is a fixed piece of hardware mounted in the door frame. The door's latchbolt extends into the strike cavity when the door closes, holding the door shut. To open the door, the latchbolt must be retracted by operating the lock from inside or using a key from outside.

An electric strike replaces this fixed strike with a unit containing a movable keeper, a solenoid, and a housing that fits into the same frame cutout a mechanical strike occupies. When the solenoid receives power or loses it, depending on configuration, the keeper pivots open. This allows the latchbolt to pass through the strike cavity and the door to swing open without the lock being operated from inside. The person entering simply pushes the door. From inside, the lock continues to operate exactly as it does without the electric strike. The inside lever or exit device retracts the latch mechanically, and the strike has no effect on egress operation.

Electric strikes are specified as an access control alternative to electrified locksets because they work with existing mechanical hardware and require only a frame modification rather than replacing the door hardware. In retrofit applications, this means adding electronic access control to a door with a good existing mortise lock or cylindrical lockset without touching the door prep or the lock itself. On new construction, electric strikes allow the same electronic access control function at lower hardware cost than a full electrified mortise lockset, making them the standard specification for office suite entries, apartment lobbies, intercom-released entries, and any access-controlled opening that does not require the higher security of an integrated electrified lock.

Fail Safe vs. Fail Secure: The Most Critical Specification Decision

Every electric strike operates in one of two modes when power is removed, and getting this wrong has code and safety consequences that cannot be corrected after the hardware is installed.

Fail Secure (Fail Locked)

A fail-secure electric strike remains locked when power is removed. The keeper stays closed, the latchbolt cannot pass through, and the door remains secured. Power must be applied to unlock the door and allow entry. This is the most common configuration in commercial access control because the default state of most controlled doors is locked. An office suite entry, a server room, a pharmacy storage room, or a perimeter door on an industrial facility should stay locked when the power system fails, not swing open. Fail-secure delivers that behavior.

Fail-secure is also the required configuration for electric strikes installed on fire-rated doors. NFPA 80 requires fire doors to positively latch when closed. A fail-safe strike on a fire door cannot guarantee positive latching because it releases the latchbolt when power fails, removing the latching function from the assembly. Fail-secure is the only code-compliant configuration for electric strikes on fire-rated door assemblies.

Fail Safe (Fail Open)

A fail-safe electric strike unlocks when power is removed. The keeper opens and the door can be pushed open freely without any credential or key from outside. Power must be continuously applied to maintain the locked condition. This configuration is required on egress doors where the code mandate is that occupants must always be able to exit without obstruction. If power fails during a fire or emergency, a fail-safe strike ensures the door can be pushed open from either side.

Fail-safe strikes are the correct specification for access-controlled exterior doors that are also primary egress paths, intercom-released apartment lobby entries, and any door where NFPA 101 or IBC requires free egress at all times. They are not appropriate for fire-rated doors because they cannot guarantee positive latching on power failure.

A practical check for any access-controlled opening: ask what happens if the power fails at 2 AM with no one in the building. If the door being unlocked creates a security risk, the application needs fail-secure. If the door being locked creates a life-safety risk because people cannot exit, the application needs fail-safe. Most commercial projects have some doors in each category, and the specification must confirm the correct mode for every opening on the hardware schedule before the order ships.

Electric Strike Types by Lockset: How to Match Strike to Hardware

The most common ordering error on electric strikes is specifying a strike for the wrong lockset type. An electric strike designed for a cylindrical lockset will not accommodate the latch geometry of a mortise lock. A strike for a rim exit device is built to handle the Pullman-style latch on a panic bar, which is mechanically different from a standard spring latch. The lockset type on the door must drive the strike selection before any other variable is considered.

Electric Strikes for Cylindrical Locksets

Cylindrical locksets are the most common commercial lock type and have the widest range of compatible electric strikes. The spring latch on a cylindrical lock is typically 1/2 inch to 3/4 inch throw, and the electric strike only needs to accommodate this single latch component. Most standard commercial electric strikes are designed for cylindrical locksets.

A critical detail on cylindrical locksets: the auxiliary deadlatch. Most commercial cylindrical locks have a small secondary latch called the deadlatch that sits beside the main spring latch. When the door closes fully, the deadlatch is depressed by the strike frame, which automatically deadlocks the main latch and prevents it from being shimmed or carded open. When an electric strike is installed, the deadlatch position relative to the strike keeper matters enormously. If the strike keeper is positioned too far from the latch, the deadlatch falls into the keeper cavity rather than being depressed by the frame. This both defeats the deadlatch security function and can create a preload binding condition. HES provides keeper shims inside every 1006 Series box specifically to adjust the keeper depth for deadlatch alignment. Always verify deadlatch engagement after installing an electric strike on a cylindrical lockset.

Electric Strikes for Mortise Locksets

Mortise locksets present a different geometry. The latch bolt on a mortise lock can throw up to 3/4 inch, and many mortise locks also have a separate deadbolt that throws 1 inch. The electric strike only releases the latchbolt. The deadbolt is not affected by the electric strike and must be retracted separately. When specifying a strike for a mortise lock, confirm whether the application uses the latch only or whether the deadbolt is also in play. A standard mortise electric strike accommodates the latch but does not interact with the deadbolt. For mortise locks with active deadbolts on access-controlled doors, the specification typically moves to an electrified mortise lock rather than an electric strike.

The faceplate dimensions on a mortise lockset are larger than on a cylindrical lock, and the strike must accommodate the full mortise faceplate geometry. Von Duprin 6200 Series electric strikes for mortise or cylindrical locks and HES 1006 Series are the primary strikes specified for mortise applications at American Locksets.

Electric Strikes for Rim Exit Devices

Rim exit devices use a Pullman-style latch that pivots rather than retracting straight into the lock body. This geometry requires a strike specifically designed for rim panic hardware. A cylindrical lockset strike will not align correctly with a Pullman latch. Using the wrong strike on a rim exit device creates a binding condition where the door latches but the strike cannot release the latch under power.

The Von Duprin 6100 Series is designed specifically for rim exit devices and is the standard specification on Von Duprin 98 and 99 Series panic hardware installations. For SVR (surface vertical rod) exit devices, electric strikes are not the correct access control solution because the SVR device requires both the top and bottom rods to be active, and the electric strike only affects the rim latch point. SVR exit devices used in access control applications typically use electric latch retraction (EL) on the exit device itself rather than a frame-mounted electric strike.

Frame Material and Faceplate Selection

The frame material determines which faceplate profile is compatible with the strike. The three common commercial frame types are hollow metal, aluminum, and wood, and each requires a different faceplate configuration.

Hollow metal frames use a square-corner faceplate that matches the standard hollow metal frame profile. Most commercial electric strikes for hollow metal frames use a standard 4-7/8-inch faceplate or a 7-15/16-inch extended faceplate. The Adams Rite 7170 Series covers mortise or cylindrical locksets in hollow metal and wood frames. Von Duprin 6200 Series covers hollow metal with various faceplate options.

Aluminum storefront frames use a radius-corner faceplate that matches the aluminum frame profile. A square-corner faceplate on an aluminum frame creates a gap at the corners that is both aesthetically unacceptable and structurally incorrect. Adams Rite is the dominant brand for aluminum storefront electric strikes because Adams Rite manufactures both the exit hardware and the electric strikes for narrow-stile aluminum door applications. The Adams Rite 7101 and 7160 cover aluminum jamb applications. The Adams Rite 74R2 Ultraline is specifically designed for narrow-stile rim devices on aluminum storefront doors.

Wood frames require a narrower faceplate profile because the wood frame does not have the same depth as a hollow metal frame. The strike body cavity must fit within the available depth of the wood jamb without breaking through the back of the frame. Adams Rite 7110 and 7111 Series cover wood, hollow metal, and aluminum jamb applications in a single strike body.

Fire-Rated Electric Strikes

On fire-rated door assemblies, the electric strike must carry a UL listing for fire door use. An unrated strike installed on a fire door voids the door assembly's fire rating, which will fail NFPA 80 inspection and creates direct liability in the event of a fire. The fire listing must match or exceed the door's fire rating.

Fire-rated electric strikes are always fail-secure as noted above, but they carry additional construction requirements. The strike body and solenoid must maintain structural integrity through the rated fire exposure duration. The UL 10C positive pressure fire test requires the complete door assembly, including the electric strike, to resist both flame passage and pressure differentials that simulate real fire conditions. Adams Rite 7240 and 7270 Series are specifically listed as fire-rated electric strikes for cylindrical and mortise lockset applications on hollow metal frames. Von Duprin 6000 Series carries UL 10C listing across the product line for fire-rated applications.

The Major Electric Strike Brands at American Locksets

American Locksets is an authorized distributor for HES, Von Duprin, and Adams Rite electric strikes. Here is how the primary product lines align with commercial applications.

HES Electric Strikes

HES (Hanchett Entry Systems) is the most widely specified electric strike brand in commercial access control. The HES 1006 Series is the flagship product for cylindrical lockset applications and is the strike most commonly specified on commercial office entries, healthcare facilities, and educational buildings. The 1006 accepts a wide range of cylindrical latch dimensions, operates on 12/24VDC dual voltage, and includes keeper shims in the hardware package for deadlatch alignment. HES offers a five-year no-fault warranty on the 1006, which is the longest standard warranty in the electric strike category, extendable to ten years with the HES Smart Pac III voltage regulator.

The HES 9000 Series covers rim exit device applications. The HES 9500 and 9600 handle rim exit devices with Pullman latches up to 3/4-inch throw. The HES 9700 and 9800 cover rim devices with specialized latch geometries including Corbin Russwin SecureBolt and Adams Rite starwheel designs. All HES products are stocked in the electric strikes catalog at American Locksets.

Von Duprin Electric Strikes

Von Duprin is the dominant brand for electric strikes on Von Duprin exit device installations. When a project runs Von Duprin 98 or 99 Series rim exit devices, the Von Duprin 6100 Series is the natural electric strike specification because both products come from the same manufacturer and are engineered to work together. The 6100 is available in fail-safe and fail-secure configurations, in 12VDC, 16VDC, and 24VDC, with an optional entry buzzer (EB designation) for intercom-released applications.

The Von Duprin 6200 Series covers mortise and cylindrical lockset applications. The 6210 is for mortise locks, the 6211 handles mortise or cylindrical, and the 6212 handles cylindrical. Von Duprin 4200 Series is a lighter-duty option for cylindrical locks with field-configurable fail-safe or fail-secure operation in a single unit, useful for projects where the access control mode may change after installation. The complete Von Duprin electric strike lineup, including the 5100 Series and specialty double-door configurations such as the 6221, 6223, and 6226, is in the electric strikes section at American Locksets.

Adams Rite Electric Strikes

Adams Rite is the market leader for electric strikes on aluminum storefront and narrow-stile door applications, which is the natural consequence of Adams Rite manufacturing both the panic hardware and the access control hardware for the aluminum door market. The Adams Rite 7100 Series covers standard cylindrical and mortise applications across hollow metal, aluminum, and wood frames. The 7400 Ultraline Series is the higher-security option with monitoring signal switches that confirm strike keeper position, providing the access control system with latch monitoring capability that standard strikes lack.

The Adams Rite 74R1 and 74R2 Ultraline covers rim exit devices on aluminum frames, and these are the correct specification for Adams Rite aluminum storefront exit device installations with access control. Fire-rated applications on hollow metal frames use the Adams Rite 7240 (cylindrical) and 7270 (mortise or cylindrical) fire-rated series. The 7800 is a surface-mount fail-safe or fail-secure electric strike for applications where frame cutting is not possible. All Adams Rite electric strikes are stocked at American Locksets.

The Preload Problem: Why Your Electric Strike Buzzes but the Door Will Not Open

Preload is the most common electric strike callback in commercial access control installations, and it is frequently misdiagnosed as a faulty strike. Understanding it before the hardware ships saves significant service time and frustration.

Preload occurs when pressure builds up on the door that forces the latchbolt hard against the electric strike keeper. When the strike solenoid activates and the keeper attempts to pivot open, the friction between the latchbolt and the keeper under pressure prevents the keeper from moving. The solenoid buzzes, the strike activates electrically, but the door does not open. The person at the door has to push slightly against the door to relieve the pressure on the latch while simultaneously pulling the handle, which reduces the friction enough for the keeper to pivot and release.

The causes of preload are direct: HVAC pressure differential across the door (common in multi-story buildings where corridor pressure differs from the space behind the door), tight weather stripping or door seals that compress the door into the frame, a door closer set too tight that holds the door hard against the frame stop, or a warped door that bears hard against the strike side of the frame. None of these conditions are visible at the time of a site survey unless the HVAC is running and conditions are normal occupied-building levels.

The solution set depends on the severity. Adjusting the door closer to reduce door-closing pressure against the frame stop is the first and least expensive fix. If the HVAC pressure differential is the source, a preload-rated electric strike with an internal cam or lever-arm release mechanism provides the additional mechanical force to open the keeper under pressure. HES manufactures preload-capable versions of several strikes specifically for this application. The Von Duprin 6000 Series is designed with robust keeper mechanics that handle moderate preload better than lighter-duty strikes.

A quick field test for preload: have someone trigger the strike electrically while you place your hand flat on the door face at the strike location and apply gentle inward pressure, then try to pull the door. If the door releases with that slight inward push and did not release without it, the installation has preload. That diagnosis confirms the problem before any hardware is replaced or service calls are scheduled. American Locksets can help confirm whether a preload-capable strike is needed for a specific application before the order ships. Call 877-471-4870 with the door location, frame type, and whether the building has significant HVAC pressure across that door.

Why Choose American Locksets for Electric Strikes

American Locksets has been an authorized commercial hardware distributor since 2001, stocking electric strikes from HES, Von Duprin, and Adams Rite across every major lockset compatibility category. Every product ships from authorized distribution with full manufacturer warranty, including the HES five-year no-fault SecuriCare warranty on stocked HES products. Same-day shipping is available on stocked configurations from multiple US warehouses.

Electric strikes at American Locksets ship alongside exit devices and panic hardware, commercial mortise locks and cylindrical locksets, commercial door closers, and builders hardware on a single authorized dealer order. For projects requiring help matching a strike to an existing lockset, confirming fail-safe or fail-secure mode for a specific door, or diagnosing a preload issue on an existing installation, call 877-471-4870. Browse the complete commercial electric strikes catalog to find the right model for every opening.

Frequently Asked Questions About Electric Strikes

What is an electric strike and how does it work?

An electric strike replaces the fixed mechanical strike plate in a door frame with a motorized unit containing a movable keeper. When the solenoid is activated, the keeper pivots open and allows the door's latchbolt to pass through, releasing the door without operating the lock from inside. Inside egress remains fully mechanical through the lever or exit device. The electric strike only controls entry from outside.

What is the difference between fail safe and fail secure electric strikes?

A fail-secure electric strike stays locked when power is removed and unlocks when power is applied. It is required on fire-rated doors and used on security-critical openings where the locked state is the safe default. A fail-safe electric strike unlocks when power is removed and requires continuous power to stay locked. It is required on egress paths where occupants must always be able to exit freely, including during power failures.

Can an electric strike be used on a fire-rated door?

Yes, but only a fail-secure electric strike with a UL listing for fire door use. NFPA 80 requires fire doors to positively latch when closed, so fail-safe strikes cannot be used on fire-rated assemblies because they release the latch on power failure. The strike must carry a UL 10C listing matching or exceeding the door assembly's fire rating. Adams Rite 7240 and 7270 Series and Von Duprin 6000 Series carry fire-rated listings for hollow metal frame applications.

How do I match an electric strike to my existing lockset?

The lockset type drives strike selection. Cylindrical locksets use standard electric strikes sized to the latch throw dimension, typically 1/2 inch to 3/4 inch. Mortise locksets require strikes that accommodate the longer latch throw and the mortise faceplate geometry. Rim exit devices require strikes specifically designed for Pullman-style panic latch geometry. Using a cylindrical lockset strike on a rim exit device or a mortise lock will result in a binding or non-functional installation. Always confirm lockset type and latch throw before ordering.

What causes an electric strike to buzz but not release the door?

In most cases, preload. Preload occurs when HVAC pressure differential, tight weather stripping, or a door closer set too firmly forces the latchbolt hard against the strike keeper under pressure. The solenoid activates but the friction between the latch and keeper prevents the keeper from pivoting open. The field test is to apply slight inward hand pressure on the door face near the strike while the strike is triggered. If the door releases with that pressure and did not release without it, preload is the cause. Solutions include adjusting the door closer, installing a preload-capable strike, or addressing the HVAC pressure source.

What voltage do commercial electric strikes operate on?

Most commercial electric strikes operate on 12VDC or 24VDC, and many modern products including HES 1006 and Von Duprin 4200 Series support both voltages in a single unit through a dual-voltage solenoid. AC operation is available on some models. Always confirm the voltage output of the access control power supply and match it to the strike's input voltage specification. Applying incorrect voltage can damage the solenoid and void the warranty.

Which electric strike brands does American Locksets carry?

American Locksets stocks electric strikes from HES, Von Duprin, and Adams Rite from authorized distribution. HES covers cylindrical and rim exit device applications with five-year no-fault warranty. Von Duprin covers rim exit device and mortise or cylindrical applications across the 4200, 5100, and 6000 Series. Adams Rite covers aluminum storefront, hollow metal, and wood jamb applications with fire-rated options. Same-day shipping is available at americanlocksets.com/electric-strikes and americanlocksets.com/adams-rite-electric-strikes.

A commercial mortise lock is the institutional standard for any door that sees high traffic, requires multiple security functions, or must integrate with an interchangeable core key program or access control system. The lock body sits in a rectangular pocket cut into the door edge, occupying the full door thickness and providing a far larger mechanism housing than a cylindrical lock can accommodate. That larger housing is what allows a mortise lock to carry a latchbolt, a deadbolt, a thumbturn, a cylinder tailpiece interface, an auxiliary deadlatch, and in electrified versions, a solenoid or motor, all in a single unit with a single door preparation. Schools, hospitals, government buildings, and any commercial project where the door hardware will be in daily use for decades all default to Grade 1 mortise locks as the specification baseline. This guide covers ANSI grading, the function codes that define how a mortise lock operates, the major series stocked at American Locksets, interchangeable core cylinder options, and the mortise cylinder cam error that generates more installation callbacks than any other mortise lock issue.

What Is a Commercial Mortise Lock?

A mortise lock installs in a rectangular pocket, called a mortise, cut into the edge of a door. The lock body, called the case, slides into this pocket flush with the door edge. The faceplate covers the case opening and mounts to the door edge face. Trim components, meaning the levers, roses or escutcheons, thumbturns, and cylinders, mount on the door face and engage the case through spindles and cylinder tailpieces that pass through the door.

The mortise lock prep on a commercial door is the standard 86 preparation: a rectangular pocket in the door edge sized to the specific lock case dimensions. On pre-mortised hollow metal doors, this pocket is cut at the factory to standard template dimensions. On wood doors or field-mortised applications, the pocket must be cut to the manufacturer's template. The 86 prep is substantially larger than the bored cylindrical prep (ANSI 161), which is why mortise locks can house more mechanism and deliver higher security ratings.

ANSI/BHMA A156.13 governs commercial mortise locks. Grade 1 is the institutional specification, requiring the lock to survive 1,000,000 operating cycles and withstand 10 blows of 75 foot-pounds applied to the strike. Sargent 8200 Series is tested to 16 million cycles in production testing. Corbin Russwin ML2000 Series specifies a 10-year limited warranty with Grade 1 performance. Both far exceed the ANSI floor. Nothing below Grade 1 belongs on a commercial institutional door.

Mortise Lock Function Codes: What They Control and Why They Matter

The function code is the two-digit number in a mortise lock model designation that defines how the lock operates: which side is keyed, whether a deadbolt is present, whether the outside lever is always locked or can be held open by a thumbturn, and how the inside lever behaves during egress. ANSI/BHMA A156.13 standardizes these function designations across manufacturers, which means an F05 classroom function on a Schlage L-Series operates identically in principle to an F05 on a Corbin Russwin ML2000.

Common Mortise Lock Function Codes

The passage function (F01) allows the latchbolt to be retracted from either side by lever at all times. No cylinder, no locking. This is specified on corridors, open-access vestibules, and any door that must stay unlocked continuously but needs a latch to keep it closed. Not appropriate for any door with a security requirement.

The classroom function (F05) keeps the outside lever free unless locked by key from outside. When the teacher turns the key in the outside cylinder, the outside lever locks. The inside lever remains free at all times for egress. In a lockdown, the teacher steps into the corridor, uses the key to lock the outside lever, then re-enters or remains inside. This is the standard classroom lock specification under most pre-2015 school security protocols. Sargent 8237, Schlage L9070, and Corbin Russwin ML2055 cover this function. Importantly, the F05 function cannot be locked from inside. A teacher inside a room with an F05 lock cannot secure the door without first opening it.

The classroom intruder function (F32) addresses this limitation. Both the inside and outside cylinder lock or unlock the outside lever. A teacher inside the room can use a key in the inside cylinder to lock the outside lever without opening the door. Inside lever remains free for egress. For any school security protocol requiring interior lockdown capability, F32 is the correct specification. Sargent 8238, Schlage L9071, and Corbin Russwin ML2052 cover this function. The cost difference between F05 and F32 on a per-lock basis is minimal. The functional difference in a threat scenario is significant.

The storeroom function (F07) keeps the outside lever rigid at all times. The only way to enter from outside is with a key. The inside lever remains free for egress. Specified on mechanical rooms, electrical rooms, storage rooms, server rooms, and any restricted-access area where the door must always require a key from outside. Sargent 8204, Schlage L9080, and Corbin Russwin ML2057 cover this function.

The entrance or office function (F04) allows the outside lever to be locked or unlocked by a thumbturn inside. When the thumbturn is set to locked, the outside lever is locked and requires a key. When unlocked, both levers operate freely. This is the standard specification for office suites, tenant entries, and commercial entries where the occupants control access from inside during business hours. Sargent 8205, Schlage L9050, and Corbin Russwin ML2054 cover this function.

The institution function (F30) is the most restrictive mechanical mortise function. Both inside and outside levers are always rigid. Entry and exit require a key from either side. The function is specified on controlled-environment applications including secure psychiatric units, certain detention applications, and any door where free egress is not required and positive two-sided key control is the design intent. Not appropriate on any egress door serving occupied spaces where code requires free egress.

The Schlage L9000 Series

The Schlage L9000 Series is the most widely specified commercial mortise lock in North America. The L9000 case is field-reversible for door handing without disassembly. The case size is 4-7/16 by 6-1/16 by 1 inch for the L9000 Series, fitting the standard commercial mortise prep. The L-Series has been in continuous production and active specification since the mid-1980s, which means it is present in the existing door preps of virtually every commercial institutional building in the United States. Specifying L-Series locks on a renovation project almost always means the new locks drop into existing pockets without any door modification.

The L9000 covers every standard ANSI function from F01 through F32 and includes occupancy indicator options for patient room and restroom applications. The L9486 adds a chevron-style occupancy indicator that displays "Occupied" when the deadbolt is thrown from inside, which is standard on hotel rooms, healthcare patient rooms, and single-occupancy restrooms. Cylinder options include conventional, FSIC, SFIC, and Schlage's Primus and Everest restricted key systems for facilities requiring key duplication control. The complete Schlage L9000 range is in the commercial locks catalog at American Locksets.

The Corbin Russwin ML2000 Series

The Corbin Russwin ML2000 Series is the institutional specification standard across healthcare and government, with particularly strong penetration in the northeastern United States. The ML2000 uses a modular design where a single lock body supports up to 12 different ANSI functions through configuration changes, reducing the number of distinct lock bodies that need to be stocked for a multi-function project. This modular capability is the same design philosophy that makes the Sargent 8200 effective on large projects where multiple rooms have different function requirements.

The ML2000 Series is rated to Grade 1 and available with Corbin Russwin SFIC cylinder options, as well as cross-manufacturer SFIC compatibility within the ASSA ABLOY key system that allows Corbin Russwin locks to share an interchangeable core hierarchy with Sargent and Yale hardware on the same campus. Lever styles include Lustra (LW), Citation (CS), and others matched to the Corbin Russwin trim catalog. The full ML2000 Series including ML2051 storeroom, ML2055 classroom, ML2052 classroom intruder, and ML2054 entrance function variants are available in the electrified and mechanical mortise locks section at American Locksets.

The Sargent 8200 Series

The Sargent 8200 Series is the primary ASSA ABLOY institutional mortise lock and carries the most extensive independent testing certification of any mortise lock in the category. The 8200 is certified to ANSI/BHMA A156.13 Series 1000 Grade 1, UL and cUL listed for 3-hour fire doors, and independently tested to 16 million cycles, which is 16 times the ANSI Grade 1 minimum. For architects and facility managers specifying hardware on coastal projects, the 8200 carries Miami-Dade Code NOA certification and Florida Building Code listing, required on any coastal construction project where the local building department mandates manufacturer-certified wind-resistance testing. No other commercial mortise lock in the category carries this certification across a broad product range.

Sargent SFIC cylinder compatibility on the 8200 is cross-manufacturer within ASSA ABLOY: Sargent 8200 locks can share a masterkey hierarchy with Yale and Corbin Russwin hardware on the same campus under a single interchangeable core key program. Behavioral health trim options including ALP anti-ligature patient lever, BHL behavioral health lever, and BHW wide-rose behavioral health trim are factory-specified on the 8200 and cannot be added in the field. These must be on the order before the lock ships. The complete Sargent 8200 Series including 8204, 8205, 8237, 8238, and electrified 8270 and 8271 variants is in the Sargent commercial hardware guide and the full locks catalog at American Locksets.

SFIC and Interchangeable Core Cylinders: What Changes the Key Program

Conventional vs. Interchangeable Core Cylinders

A conventional mortise cylinder uses a fixed, pinned cylinder that requires the lock to be disassembled from the door to change the keyway. An interchangeable core (IC) cylinder uses a removable core that pulls out of the cylinder housing with a control key, without any tools or door disassembly. The new core drops in, the control key is removed, and the lock operates on the new key immediately. For facilities managing access across dozens or hundreds of doors, the ability to rekey a door in 60 seconds without a locksmith or door disassembly changes the operational cost equation significantly.

SFIC vs. FSIC: Choosing the Right Format

Two main IC formats exist in commercial mortise locks. The small format interchangeable core (SFIC) uses the Best-style 7-pin core format and is the most widely adopted system in institutional hardware. SFIC is supported by Schlage, Corbin Russwin, Sargent, Yale, and other ASSA ABLOY brands, allowing cross-manufacturer interchangeability where a single control key system can remove and install cores in locks from multiple different manufacturers in the same building. The full-size interchangeable core (FSIC) uses a larger format core specific to each manufacturer family, without the cross-manufacturer compatibility of SFIC. For campus-wide key programs spanning multiple hardware brands, SFIC is the specification that provides maximum flexibility. For single-brand projects, FSIC provides equivalent operational convenience within the brand.

The Mortise Cylinder Cam Error Nobody Warns You About

Why the Wrong Cam Produces a Passage-Mode Door

The most consistent mortise lock callback at American Locksets customer sites is a replacement cylinder that was ordered correctly by keyway and length but arrived with the wrong cam profile. The key turns, the cylinder rotates, and nothing happens. The door does not latch or unlatch. The installer checks the keyway compatibility, confirms the cylinder length, tries again, and still gets nothing.

The cause is the cam. A mortise cylinder cam is the small rotating lug at the base of the cylinder that physically actuates the tailpiece inside the lock case when the key is turned. There is no universal cam standard across the hardware industry. Schlage L-Series uses specific cam profiles for specific functions. Corbin Russwin ML2000 uses different cam profiles for A01 and A02 cam-required functions. Sargent 8200 Series uses cam designations that differ from both. A cylinder with a Schlage-pattern keyway but the wrong cam for a Corbin Russwin lock body will not actuate the mechanism regardless of any other compatibility.

The specific detail: the Corbin Russwin ML2000 function list specifies which functions require an A02 cam as an extra part. The ML2052 (classroom intruder, F32), ML2053, ML2055 (classroom, F05), and ML2042 all require the A02 cam (part 756F517) to function correctly. Ordering these functions without specifying the A02 cam results in a lock body that physically cannot engage the outside lever locking function. The door operates only in passage mode regardless of the model number on the box. This detail is in the Corbin Russwin ML2000 function chart but is easy to miss on a large project where multiple functions are being ordered simultaneously.

The rule for any mortise cylinder replacement order: confirm the cam profile designation required by the specific lock body and function, not just the keyway and length. American Locksets confirms the cam requirement before every mortise cylinder order ships. Call 877-471-4870 with the lock manufacturer, series, and function number before placing any mortise cylinder replacement order.

Why Choose American Locksets for Commercial Mortise Locks

American Locksets has been an authorized commercial hardware distributor since 2001, stocking Grade 1 commercial mortise locks from Schlage, Corbin Russwin, Sargent, BEST, Cal-Royal, and Arrow across every standard ANSI function, IC core configuration, and electrified variant. Same-day shipping is available on stocked configurations. Every mortise lock order is confirmed for function code, cylinder prep, lever style, escutcheon or rose format, and hand before shipping.

Commercial mortise locks at American Locksets ship alongside exit devices and panic hardware, electric strikes for access control integration, commercial door closers, commercial door hinges, alarmed exit devices, and builders hardware on a single authorized dealer order. For help confirming function code, cylinder prep, cam requirement, or IC core compatibility for a specific project, call 877-471-4870 before ordering.

Frequently Asked Questions About Commercial Mortise Locks

What is the difference between a mortise lock and a cylindrical lock?

A mortise lock installs in a rectangular pocket cut into the door edge, providing a larger case that can house a latchbolt, deadbolt, thumbturn, auxiliary deadlatch, and cylinder tailpiece in a single unit. A cylindrical lock installs through two bored holes in the door face without cutting a pocket. Mortise locks provide higher security ratings, more function options, longer cycle life, and are the standard for institutional commercial applications. Cylindrical locks are faster to install and cost less per unit, making them appropriate for lower-traffic commercial applications where the mortise lock's additional durability is not required.

What do mortise lock function codes mean?

Function codes per ANSI/BHMA A156.13 describe exactly how a mortise lock operates: which side is keyed, whether the outside lever is always locked or can be controlled by thumbturn or key, and how the inside lever behaves during egress. Common functions include F04 entrance/office (thumbturn inside controls outside lever), F05 classroom (outside key controls outside lever), F07 storeroom (outside lever always rigid, key entry only), and F32 classroom intruder (key from either side controls outside lever, inside lever always free). The function number is part of every mortise lock model designation.

What is the difference between classroom function F05 and classroom intruder F32?

A classroom F05 lock can only be locked from outside with a key. A teacher inside the room cannot lock the outside lever without opening the door and stepping into the corridor. An F32 classroom intruder lock can be locked from either side with a key, meaning a teacher inside the room can lock the outside lever with the inside cylinder without opening the door. For any school security protocol requiring interior lockdown capability, F32 is the correct specification. Schlage L9071, Sargent 8238, and Corbin Russwin ML2052 are the F32 classroom intruder models stocked at American Locksets.

What is an SFIC cylinder and why does it matter for mortise locks?

A small format interchangeable core (SFIC) cylinder uses a removable core that pulls out with a control key without tools or door disassembly. The new core drops in and the lock operates immediately on the new key. This allows facilities to rekey any door in under 60 seconds without a locksmith. SFIC is supported across Schlage, Corbin Russwin, Sargent, and Yale locks under the ASSA ABLOY key system, providing cross-manufacturer interchangeability where a single control key handles all brands on campus.

What is a mortise cylinder cam and why does it matter?

A mortise cylinder cam is the small rotating lug at the base of the cylinder that physically actuates the lock mechanism when the key is turned. Different lock bodies require specific cam profiles. A cylinder with the correct keyway but the wrong cam profile will not engage the lock mechanism, leaving the door in passage mode regardless of the key. There is no universal cam standard across manufacturers. Always confirm the required cam designation against the specific lock body and function number before ordering any mortise cylinder replacement. Corbin Russwin ML2000 functions including F05, F32, and F09 require the A02 cam as a separate component that must be included in the order.

Can a mortise lock be installed on an existing door prepped for a cylindrical lock?

Only with significant door modification. A cylindrical lock prep (ANSI 161) consists of two round bores, which must be filled and a new rectangular mortise pocket cut into the door edge. On most commercial hollow metal doors, this modification is impractical in the field and typically requires door replacement. On new construction, the correct prep must be specified at the factory. When retrofitting from cylindrical to mortise on an existing door, consult with the supplier before ordering to determine whether the door can be modified or must be replaced.

Which mortise lock brands does American Locksets carry?

American Locksets stocks Grade 1 commercial mortise locks from Schlage (L9000 Series in all standard functions including F01, F04, F05, F07, F30, F32, and electrified L909x variants), Corbin Russwin (ML2000 Series), Sargent (8200 Series including 8204, 8205, 8237, 8238, 8270, 8271), BEST (9K Series), Cal-Royal, and Arrow from authorized distribution. Same-day shipping on stocked configurations. The complete catalog is in the commercial locks section at American Locksets with specification support at 877-471-4870.

Commercial door hinges are the one hardware component that almost every facility manager and contractor buys by habit rather than specification. The door needs hinges, three go on a standard 7-foot door, the installer grabs whatever is in the bin, and the job moves on. That approach works until it doesn't. A plain-bearing hinge on a door with a closer wears out years before its rated service life. A standard hinge on an outswing exterior door without a non-removable pin is a security vulnerability that anyone with a hammer and a punch can exploit in seconds. A standard-weight hinge on a heavy hollow metal door produces exactly the hinge sag that leads to latch misalignment, callbacks, and eventually a broken hinge barrel. This guide covers the full specification picture: bearing types and when each applies, hinge mounting configurations, sizing by door height and weight, NRP and security stud options for outswing doors, swing clear hinges for ADA compliance, fire door requirements, and the brands stocked at American Locksets.

What Is a Commercial Door Hinge?

A commercial door hinge is a two-leaf pivot hardware component that carries the weight of a door and allows it to swing. One leaf mortises or mounts to the door edge, one to the door frame rabbet, and the two leaves connect through a barrel and hinge pin. Commercial hinges differ from residential hinges in construction gauge, bearing type, cycle rating, finish durability, and template compliance with ANSI/BHMA standard hole patterns for hollow metal door and frame preparations.

ANSI/BHMA grades commercial hinges under standard A156.1. Grade 1 is the commercial and institutional standard, rated to 1,500,000 cycles. Grade 2 covers light commercial applications, rated to 1,000,000 cycles. Grade 3 is residential, rated to 250,000 cycles. On a high-traffic school corridor door cycling 400 times a day, a Grade 1 hinge delivers roughly 10 years of rated cycle life. For any commercial building, Grade 1 is the defensible and correct specification.

Ball Bearing vs. Plain Bearing Hinges: When Each Is Correct

The bearing type inside the hinge barrel is the most consequential specification decision on the hinge schedule. It determines how quickly the hinge wears and whether it is appropriate for the application's specific loading conditions.

Ball Bearing Hinges

A ball bearing hinge contains hardened steel ball bearings seated between the knuckles. The bearings carry the door's weight and absorb the friction of the swinging motion. This means the knuckle surfaces never contact each other directly. Friction is minimal, operation is smooth, and wear occurs at the ball bearings rather than the knuckle steel itself. Ball bearings are replaceable in some configurations, which extends hinge service life significantly compared to a plain bearing hinge where knuckle wear is permanent and progressive.

Ball bearing hinges are required on every door that has a door closer installed. The closer applies consistent closing torque to the hinge on every single cycle. Plain bearing knuckles under that constant directional load wear at an accelerated rate. The combination of ball bearings and closer torque is well-understood in the hardware industry, and specifying plain bearing hinges on a door with a closer is a shortcut that produces hinge sag and premature failure. Beyond closer-equipped doors, ball bearings are required on any high-frequency commercial door (over 200 cycles per day), any door over 200 pounds, and any exterior door subject to wind load that creates lateral force at the hinge.

Plain Bearing Hinges

A plain bearing hinge has no bearing material between the knuckles. The leaves rotate through direct metal-to-metal contact. Plain bearing hinges are manufactured to the same template patterns as ball bearing hinges and fit the same door and frame preparations. The difference is entirely internal.

Plain bearing hinges are the correct specification for low-frequency interior doors without closers: light-duty storage room doors, interior office doors with low traffic and no closer, and utility doors that cycle a handful of times per day. On these applications, the absence of ball bearings does not meaningfully affect service life because the load and cycle frequency are well within plain bearing limits. Hager 1191 Series and Stanley plain bearing hinges cover this category at American Locksets, providing a cost-effective solution for low-duty interior applications without overspecifying for doors that do not need bearing-grade hardware.

Hinge Mounting Configurations: Full Mortise, Half Surface and Full Surface

The mounting configuration determines how the hinge leaves attach to the door and frame and whether the hinge is visible or flush-mounted.

Full Mortise (Recessed Both Sides)

Full mortise is the default commercial configuration. Both leaves are recessed into the door edge and the frame rabbet so the hinge sits flush and does not project into the door clearance zone. Standard hollow metal door and frame assemblies come pre-punched to the ANSI template pattern for full mortise hinges. This is correct for new commercial construction on hollow metal, and it produces the cleanest installation without any additional routing or modification.

Half Surface and Full Surface

Half surface hinges have one leaf mortised and one leaf surface-mounted. Full surface hinges have both leaves surface-mounted on the face of the door and frame. These configurations are used primarily in retrofit applications where mortising the door or frame is impractical, or on lightweight interior doors where surface mounting is acceptable. They are not the standard specification for hollow metal commercial new construction and should not be ordered for pre-punched hollow metal applications.

Hinge Sizing: Height, Width, and Weight Class

Hinge size is expressed as height by width, both in inches. Height is measured along the barrel axis. Width is measured from the barrel centerline to the outer edge of each leaf. Hinge width must accommodate the door thickness plus required clearance. For a standard 1-3/4 inch hollow metal commercial door, the 4-1/2 by 4-1/2 inch hinge is the dominant commercial size and fits the vast majority of standard openings without modification.

Sizing by Door Width

Door width drives hinge height selection. For doors up to 36 inches wide at standard 1-3/4 inch thickness, 4-1/2 inch hinges are correct. For doors over 36 inches and up to 48 inches, 5-inch hinges are the correct specification. Doors over 42 inches wide in extra thickness (2-1/4 or 2-1/2 inch door) move to a heavy-weight 6-inch hinge. These are baseline guidelines from ANSI/BHMA A156.1 and DHI reference standards. Edge cases with unusual door weight or thickness require verification against the specific sizing matrix.

Standard Weight vs. Heavy Weight

Hinge weight class refers to the gauge thickness of the hinge leaves, not the physical weight of the hinge itself. Standard weight hinge leaves are approximately 0.134 inch gauge. Heavy weight hinge leaves are approximately 0.180 to 0.200 inch gauge. The thicker material resists the long-term deformation that occurs when a heavy door or high-frequency cycling applies consistent stress to the hinge leaf at the screw pattern.

Heavy weight hinges are required on any door over 200 pounds and strongly recommended on any exterior hollow metal door with a closer regardless of door weight. The rule that is most frequently missed: both size and weight class must appear explicitly on the hardware schedule. "4-1/2 x 4-1/2 ball bearing hinge" does not specify whether the hinge is standard or heavy weight. The schedule must read "4-1/2 x 4-1/2 heavy weight ball bearing hinge" to communicate the correct specification unambiguously. Hager BB1279 and Stanley FBB179 are the heavy weight ball bearing hinges stocked at American Locksets for standard commercial hollow metal applications.

Number of Hinges Per Door

The standard commercial specification is three hinges for doors up to 90 inches (7-foot-6 inches) tall. Four hinges for doors from 90 to 120 inches tall. Add one hinge for every additional 30 inches of door height beyond 120 inches. Fire-rated doors require a minimum of three hinges regardless of door height. Heavy doors or high-frequency entry doors may require four hinges on a standard-height door to distribute the load more evenly and reduce stress on each hinge barrel.

Non-Removable Pin (NRP) and Security Studs: The Outswing Door Vulnerability Nobody Discusses

This is the specification detail that gets omitted from hardware schedules more often than any other hinge feature, and it represents a genuine physical security vulnerability on every outswing door where it is missed.

On a standard inswing door, the hinge side faces the building interior. The barrel and pin are inside. An exterior intruder cannot reach the hinge pin without first defeating the lock, which is the intended sequence. Reverse the swing and the geometry changes entirely. On an outswing exterior door, the hinge leaves and the hinge pin face the street, the parking lot, or the unsecured exterior. Anyone with a hammer and a steel punch can knock the pin out of the barrel in seconds. With the pin removed and the lock still engaged, the entire door is lifted off the hinges from the hinge side. The lock provides no protection whatsoever against this attack because the door is removed, not the lock defeated.

Two hinge features address this vulnerability. The non-removable pin (NRP) uses a set screw threaded through the middle knuckle to lock the pin in the barrel. The set screw is installed from inside the door on the protected side and cannot be accessed when the door is closed. This prevents pin extraction on outswing doors where the barrel is accessible from the exterior. The security stud (SS) is a different and complementary feature: a projection on one hinge leaf that seats into a matching hole on the opposite leaf when the door is closed. Even if the pin were somehow extracted, the security stud locks both leaves together and prevents the door from being separated from the frame.

Standard specification practice requires NRP on all exterior outswing doors regardless of building type. Schools, hospitals, retail perimeter entries, industrial facilities, and any building with outswing doors facing an unsecured area all require NRP or security stud hinges on every exterior outswing opening. Ives 5BB1 SC NRP and Stanley FBB168NRP are stocked at American Locksets in the commercial door hinges section for these applications. This is the specification detail most likely to be present on new construction schedules and most likely to be omitted on renovation and retrofit orders. American Locksets flags outswing door applications before shipping hinges without NRP designation.

Swing Clear Hinges for ADA Compliance

A standard door hinge positions the door so that when it is fully open, the door itself partially blocks the opening. The door thickness and the hinge barrel geometry mean the effective clear opening width is the nominal door width minus the door thickness. On a 36-inch door with 1-3/4 inch thickness, the effective clear opening at full swing is approximately 34-1/4 inches. For ADA-compliant accessible routes, the 2010 ADA Standards require a minimum 32-inch clear opening at 90 degrees, measured between the open door face and the door stop. A standard 36-inch door meets this requirement in most configurations.

However, where the required clear opening is 34 inches or greater, where a door serves a healthcare application requiring gurney or wheelchair clearance beyond the minimum, or where the architectural configuration places the door stop in a position that reduces effective clear width, a swing clear hinge is the code-compliant and practical solution. A swing clear hinge uses an offset knuckle geometry that causes the door to swing fully out of the opening when opened to 90 degrees or beyond. The entire door width moves clear of the frame, providing the maximum possible clear opening equal to the full door width. Ives 5BB1 SC Series swing clear hinges and Hager BB1260 swing clear hinges are stocked at American Locksets in the door hinges catalog. Swing clear hinges are also specified on hospital patient room doors and any healthcare facility door where equipment clearance is a design requirement beyond ADA minimums.

Fire Door Hinge Requirements

Fire-rated door assemblies require hinges that do not compromise the assembly's fire rating. NFPA 80 addresses this through material and quantity requirements. Steel hinges with steel pins are required on fire-rated assemblies. Aluminum hinges are not acceptable on fire-rated doors. Brass hinges are also generally not acceptable unless specifically listed for the fire door assembly. The hinge must be compatible with the fire label on the door and frame.

Hinge quantity on fire-rated doors must meet the minimum of three hinges regardless of door height. The door manufacturer's fire listing will specify the minimum hinge count and acceptable hinge types. Deviating from the listed hardware configuration, including substituting fewer hinges or a different hinge type, voids the fire assembly rating and creates direct liability in the event of a fire. Confirm the hinge specification against the door manufacturer's listing before finalizing the hardware schedule on any fire-rated opening.

The Hinge Specification Detail That Generates the Most Returns

The most consistent hinge ordering error at American Locksets is ordering standard-weight ball bearing hinges for exterior hollow metal doors that need heavy-weight hardware, followed immediately by ordering hinges without confirming whether the door application is template or non-template prep.

Template hinges have a standardized screw pattern that matches the ANSI standard prep punched into hollow metal doors and frames at the factory. Non-template hinges have a different screw pattern that requires field drilling. On a commercial hollow metal project, ordering non-template hinges means the installer shows up with hinges that do not fit the existing prep. This is correctable only by drilling new holes or reordering, both of which cost more than the hinge itself.

Before every hinge order ships from American Locksets, confirm: template or non-template prep, bearing type, weight class, door swing direction (inswing or outswing, which determines NRP requirement), and finish. The finish must match adjacent hardware for the completed opening to look correct. Finish codes follow ANSI A156.18 standards: US26D is satin chrome (626), US10B is oil-rubbed bronze (695), US32D is satin stainless (630). All stocked at American Locksets. Call 877-471-4870 with door dimensions, weight, and swing direction before ordering any commercial hinge on a retrofit application.

The Major Commercial Hinge Brands at American Locksets

American Locksets stocks commercial door hinges from Hager, Stanley, Ives, and Cal-Royal from authorized distribution across full mortise ball bearing, plain bearing, swing clear, and specialty hinge configurations.

Hager is one of the most widely specified commercial hinge brands in the United States. The Hager BB1279 is the standard Grade 1 five-knuckle ball bearing full mortise hinge for hollow metal applications. The Hager 1191 covers plain bearing applications on low-duty interior doors. The Hager BB1260 provides swing clear function for ADA applications. The complete Hager hinge range is stocked in the door hinges section at American Locksets.

Stanley FBB Series hinges are Grade 1 five-knuckle ball bearing hinges with hardened chrome alloy ball bearing assemblies. The Stanley FBB179 and FBB168NRP cover standard and NRP outswing applications. Stanley F248 covers swing clear plain bearing applications on lighter interior doors. Stanley hinges are template-compatible and available in all standard ANSI architectural finishes.

Ives 5BB1 Series covers the full Grade 1 ball bearing hinge specification including standard, swing clear (SC), non-removable pin (NRP), hospital tip (HT), and heavy weight (HW) variants. Ives 5BB1 SC covers ADA swing clear applications. Ives 5BB1 NRP covers outswing security applications. Ives 5BB1B SC HW covers swing clear on beveled-edge doors in heavy weight construction. All Ives hinge products are available in the door hinges catalog.

Cal-Royal BB Series provides ball bearing swing clear hinges in template format for ADA retrofit and new construction applications. Cal-Royal BB600, BB800, and BB400 cover single-door, heavy-weight, and standard-weight swing clear configurations.

Why Choose American Locksets for Commercial Door Hinges

American Locksets has been an authorized commercial hardware distributor since 2001, stocking commercial door hinges from Hager, Stanley, Ives, and Cal-Royal across full mortise ball bearing, plain bearing, swing clear, NRP, heavy weight, and fire-rated configurations. The complete commercial hinge catalog, including specialty hinges for hospital tips, beveled-edge doors, and security stud applications, is in the commercial door hinges section. Same-day shipping on stocked configurations.

Commercial door hinges at American Locksets ship alongside commercial door closers, commercial mortise locks and lever locks, exit devices and panic hardware, continuous geared hinges, and builders hardware on a single authorized dealer order. For help confirming bearing type, weight class, NRP requirement, swing direction, or template compatibility on any project, call 877-471-4870 before ordering.

Frequently Asked Questions About Commercial Door Hinges

What is the difference between ball bearing and plain bearing door hinges?

A ball bearing hinge contains hardened steel ball bearings between the knuckles that carry the door's weight and reduce friction during the swing cycle. A plain bearing hinge has no bearing material and the knuckles rotate through direct metal-to-metal contact. Ball bearing hinges are required on any door with a door closer, any high-frequency door over 200 cycles per day, any door over 200 pounds, and any exterior door subject to wind load. Plain bearing hinges are appropriate only for low-frequency interior doors without closers.

What size hinge does a standard commercial door need?

The most common commercial hinge size is 4-1/2 by 4-1/2 inches, which fits a standard 1-3/4 inch thick hollow metal door up to 36 inches wide. Doors over 36 inches wide typically need a 5-inch hinge. Doors over 42 inches wide in extra thickness (2-1/4 or 2-1/2 inch door) require a heavy-weight 6-inch hinge. Hinge count per door: three hinges for doors up to 90 inches tall, four for 90 to 120 inches, and one additional hinge for every 30 inches beyond 120 inches.

What is an NRP hinge and when is it required?

NRP stands for non-removable pin. A set screw in the middle knuckle locks the hinge pin from being extracted from the barrel. On an outswing exterior door, the hinge barrel faces the unsecured exterior. A standard removable-pin hinge on an outswing door can be defeated by knocking out the pin, lifting the door off the hinges, and entering the building with the lock still engaged. NRP hinges are required on all exterior outswing doors as a basic security specification. Security studs (SS) provide an additional layer of protection where the hinge leaves interlock when the door is closed, preventing door removal even if the pin were somehow extracted.

What is a swing clear hinge and when does it apply?

A swing clear hinge uses an offset knuckle geometry that swings the door completely out of the door opening when fully open, providing maximum clear opening width equal to the full door width. Standard hinges leave the door partially in the opening when swung to 90 degrees, reducing effective clear width by the door thickness. Swing clear hinges are specified on ADA accessible routes where the required clear opening exceeds what a standard hinge provides, on healthcare doors requiring gurney or equipment clearance, and on any door where full opening width is an operational requirement.

What hinge weight class should I specify for a commercial door?

Standard weight hinges are appropriate for interior doors under 200 pounds with low to moderate traffic. Heavy weight hinges are required for doors over 200 pounds and strongly recommended for any exterior hollow metal door with a door closer regardless of door weight. Heavy weight hinge leaves run approximately 0.180 to 0.200 inch gauge versus 0.134 inch for standard weight. The hardware schedule must specify both hinge size and weight class explicitly. "4-1/2 x 4-1/2 ball bearing hinge" is incomplete. "4-1/2 x 4-1/2 heavy weight ball bearing hinge" is the correct specification.

Can I use aluminum hinges on a fire-rated door?

No. NFPA 80 requires steel hinges with steel pins on fire-rated door assemblies. Aluminum hinges are not acceptable on fire-rated openings. Brass hinges are also generally not acceptable unless specifically listed for the fire door assembly. Fire-rated doors also require a minimum of three hinges regardless of door height. Confirm hinge type and quantity against the door manufacturer's fire listing before finalizing the hardware schedule on any fire-rated opening.

Which commercial hinge brands does American Locksets carry?

American Locksets stocks Grade 1 commercial door hinges from Hager (BB1279 ball bearing, 1191 plain bearing, BB1260 swing clear), Stanley (FBB179, FBB168NRP, F248 swing clear), Ives (5BB1 Series in standard, NRP, swing clear, heavy weight, hospital tip configurations), and Cal-Royal (BB Series swing clear). Same-day shipping on stocked configurations. The complete catalog is in the door hinges section at American Locksets with specification support at 877-471-4870.

A commercial door closer controls how a door opens, how quickly it swings shut, and whether it latches every single time someone passes through. On a school corridor door cycling 400 times a day, or a hospital entry where a patient with limited strength needs to open the door without fighting it, the closer specification determines both security and accessibility compliance simultaneously. Get it right and the door closes reliably for decades. Get it wrong and you end up with a door that slams, fails to latch against wind pressure, or requires more than 5 pounds of force to open, putting the facility out of ADA compliance. Three decisions drive every commercial door closer specification: the ANSI size that matches the door's width and weight, the arm type that fits the door's swing direction and mounting conditions, and the features that satisfy fire door, ADA, or operational hold-open requirements. This guide covers all three, the products stocked at American Locksets, and the parallel arm undersizing problem that generates more callbacks than any other door closer specification error.

What Is a Commercial Door Closer and How Does It Work?

A commercial door closer is a hydraulic device that controls door motion through two mechanisms working simultaneously. A coil spring provides the closing force that swings the door shut. A hydraulic piston filled with oil regulates the speed of that swing through adjustable valves. When someone opens the door, they compress the spring and push the hydraulic fluid through the sweep valve. When they release the door, the compressed spring pushes it closed and the fluid meters back through the sweep and latch speed valves at a rate set by the installer. The result is a door that closes at a consistent, controlled speed every time, regardless of how forcefully it was pushed open.

The adjustable valves on a commercial door closer are the field controls that allow a single closer model to be tuned for the specific door and conditions. The sweep speed valve controls closing speed from fully open down to approximately 10 to 12 degrees from the latch position. The latch speed valve controls the final closing motion from that point to full latch engagement. Both valves are adjusted by turning a small screw or hex socket, clockwise to slow and counterclockwise to speed up. A third valve, the backcheck, resists the door being pushed open too forcefully and engages at approximately 70 to 85 degrees of opening. Backcheck protects the door, frame, and closer body from impact damage on high-traffic doors and any exterior door subject to wind load.

ANSI Closer Sizes 1 Through 6: Matching the Closer to the Door

ANSI/BHMA A156.4 defines six closer spring sizes based on the force required to close the door. A higher size number means a stronger spring and more closing force. Size 1 is the lightest, appropriate for very small or light interior doors. Size 6 is the heaviest, for extra-wide or extremely heavy exterior doors. Every commercial door closer specification begins here, because an undersized closer will not latch the door reliably, and an oversized closer will exceed the ADA 5-pound opening force limit on accessible routes.

The sizing table below covers standard commercial applications. These are baseline recommendations for regular arm mounting in normal interior conditions. Parallel arm installations require stepping up one size due to the 20 to 25 percent efficiency reduction discussed in detail below. Exterior doors subject to HVAC stack pressure or significant wind exposure may require stepping up one additional size beyond the table baseline.

Most commercial Grade 1 door closers ship adjustable across the full size 1 through 6 range from a single unit. The LCN 4040XP ships set to size 3 and is field-adjustable from size 1 through 6 using the green dial indicator on the closer body. This means the installer sets the spring size on the job based on the actual door behavior after installation, not before. The Norton 7500 operates the same way with a size 1 through 6 adjustable spring range on the same unit.

Door Closer Arm Types: Regular, Parallel, and Top Jamb

The arm type determines how the closer body and arm assembly mount relative to the door and frame. This decision affects both the closer's mechanical efficiency and the aesthetics of the installation. Choosing the wrong arm type for the door's swing direction or mounting condition results in a closer that cannot deliver its rated closing force to the door.

Regular Arm (Pull-Side Mount)

In regular arm configuration, the closer body mounts on the pull face of the door, and the forearm connects to a shoe on the frame head. This is the most power-efficient mounting geometry. The arm works with the door's swing arc, providing the full rated closing force at every spring size. Regular arm is the default specification for in-swinging interior doors where the closer is mounted on the non-public pull side and aesthetics are not the primary concern. The arm projects perpendicular from the frame when the door is closed, which makes it more visible and more accessible to vandalism than parallel arm.

Parallel Arm (Push-Side Mount)

In parallel arm configuration, the closer body mounts on the push face of the door and the arm runs parallel to the door face when closed. This is the most common specification in schools, hospitals, government buildings, and any institutional application where the closer must be on the secure interior side of an outswinging door. The arm tucks along the door face rather than projecting into the opening, which reduces vandal exposure significantly.

The trade-off is mechanical efficiency. Parallel arm geometry is approximately 20 to 25 percent less power-efficient than regular arm at the same spring size. A closer set to size 4 in parallel arm delivers the closing force of roughly size 3 in regular arm. This efficiency loss is the most common and most costly specification error on commercial door closer projects. A parallel arm closer sized the same as a regular arm closer on the same door will fail to latch reliably against wind pressure, HVAC stack pressure, or heavy weather stripping. The door looks closed but does not catch the strike. The fix seems like a closer adjustment problem, but it is actually a sizing problem that cannot be corrected by turning the valves. The correct specification: when selecting a closer for parallel arm installation on an exterior door, choose one spring size higher than the door width table recommends and confirm adequate closing force after installation.

Top Jamb Mount (Push-Side, Frame-Mounted)

In top jamb configuration, the closer body mounts on the frame head and the arm extends to the door face. Power efficiency is comparable to regular arm, making it a better choice than parallel arm when push-side mounting is required but parallel arm is not feasible due to door rail height or clearance constraints. Top jamb is the standard specification for exterior outswinging doors on aluminum storefront applications where the door's top rail is too narrow to support a closer body, and for applications where the architectural specification does not allow a body-mounted closer on the door face.

ADA Opening Force Requirements and Door Closer Sizing

The Americans with Disabilities Act Accessibility Guidelines set a maximum opening force of 5 pounds for interior non-fire-rated doors on an accessible route. This is the most restrictive force limit in commercial door hardware specification and it directly controls closer sizing. A closer that is set too strong for the door width will require more than 5 pounds of opening force, creating an ADA compliance failure that must be corrected before the building can pass accessibility inspection.

The 5-pound limit applies to interior non-fire-rated doors. Fire-rated doors are not subject to the 5-pound ADA opening force cap under federal standards, though they must still close and latch reliably under the closer's spring force. Exterior doors are not subject to a federal opening force limit under ADA, though many states and local codes impose their own limits typically in the 8.5-pound range.

The minimum closing speed requirement, independent of the opening force rule, requires that the door close from 90 degrees to within 12 degrees of the latch in no less than 5 seconds. This minimum speed prevents doors from closing so slowly that they create a safety hazard in egress paths. The 5-second minimum sweep time and the 5-pound maximum opening force must both be satisfied simultaneously. If a door needs a stronger spring to latch reliably but the stronger spring pushes opening force above 5 pounds, the correct solution is not to continue increasing spring tension. The correct solution is a power operator on the accessible route.

Fire Door Closer Requirements and Hold-Open Rules

Every fire-rated door assembly must have a self-closing device. The door closer must carry a UL listing for fire door use, which the major commercial brands including LCN 4040XP and Norton 7500 carry as standard. A fire door without a functional closer fails NFPA 80 compliance regardless of the door assembly's fire rating.

The most important and most frequently violated rule on fire door closer specifications is the hold-open prohibition. A standard mechanical hold-open arm, which holds the door open at a set angle through a friction or detent mechanism, cannot be used on a fire-rated door. Fire doors must be free to close and positively latch whenever the door is released. A mechanical hold-open arm prevents this by design. Using a standard hold-open arm on a fire door is a code violation under NFPA 80 even if the closer body itself carries a fire rating.

For fire-rated doors that need to stand open during business hours, the code-compliant solution is an electromagnetic hold-open device tied to the fire alarm panel. The electromagnetic holder releases the door when the fire alarm activates, allowing the closer to swing the door shut and latch it. Fusible link hold-open arms, which release the hold-open function when the link reaches its rated temperature, are also code-compliant on fire doors where hold-open is operationally necessary. The LCN 4040SE Sentronic is the fire alarm-integrated automatic hold-open closer from LCN specifically designed for fire door applications, stocked in the LCN door closers section at American Locksets.

The Major Door Closer Brands at American Locksets

American Locksets stocks commercial door closers from LCN, Norton, and Sargent from authorized distribution. Each brand covers the full ANSI Grade 1 commercial specification range with differences in cycle life, arm options, mounting versatility, and price tier.

LCN 4040XP Series

The LCN 4040XP is the most widely specified Grade 1 surface-mounted commercial door closer in the United States and the premier product in the American Locksets door closer catalog. The 4040XP uses a cast iron body, a forged steel Extra Duty Arm in the EDA configuration, and LCN's Liquid X all-weather hydraulic fluid that maintains stable viscosity from minus 30 degrees Fahrenheit to 120 degrees Fahrenheit. This fluid performance matters on exterior doors that experience significant temperature swings between seasons, where standard hydraulic fluid thickens in cold and thins in heat, causing closing speed to change with the weather.

The 4040XP is field-adjustable from size 1 through 6 and available in every arm configuration: regular arm (RW/PA), parallel arm (PA), top jamb, hold-open arm (HW/PA), Extra Duty Hold Open (HEDA), CUSH-N-STOP backcheck arm, and extra duty spring CUSH-N-STOP. LCN backs the 4040XP with a 30-year limited mechanical warranty, the longest standard warranty in the commercial door closer category. The complete LCN 4040XP arm configuration lineup is in the LCN door closers catalog at American Locksets. The LCN 1460 Series covers heavy-duty applications requiring maximum closing force in demanding institutional environments, also stocked at American Locksets.

Norton 7500 Series

The Norton 7500 is a Grade 1 cast iron commercial door closer from ASSA ABLOY that provides a cost-effective alternative to the LCN 4040XP on projects where cycle life above 2 million cycles is acceptable and the full 10-million-plus cycle rating of the 4040XP is not required. The Norton 7500 tri-packs all three arm configurations (regular, top jamb, and parallel arm) in a single box, which reduces ordering complexity and reduces the risk of receiving the wrong arm configuration for mixed-mounting projects.

The 7500 is adjustable from size 1 through 6, carries UL 10C fire door listing, and meets ADA opening force requirements when correctly sized. Norton backs the 7500 with a 25-year limited mechanical warranty. For school renovation projects, smaller commercial build-outs, or any application where the LCN 4040XP's premium price point and extended cycle life are not justified by the door's traffic volume, the Norton 7500 is the correct specification. The complete Norton door closer range is available in the commercial door closers section at American Locksets.

Sargent 351 Series

The Sargent 351 Series covers standard surface-mounted Grade 1 commercial door closer applications and is frequently specified alongside Sargent mortise locks and exit devices on projects where consistent brand specification across the hardware schedule simplifies procurement and service. The 351 covers regular arm, top jamb, and parallel arm mounting across the standard size range with the same ADA and fire door compliance as LCN and Norton equivalents. The Sargent door closer catalog is available in the commercial door closers section at American Locksets.

The Parallel Arm Undersizing Problem Nobody Warns You About

The most consistent specification error on commercial door closer projects at American Locksets is parallel arm undersizing on exterior doors. Here is exactly what happens. The installer reads a sizing chart showing size 4 for a standard 42-inch exterior door. They order a size 4 closer in parallel arm configuration. After installation, the door swings shut but does not reliably catch the strike. On days with significant HVAC pressure differential or even moderate wind, the door swings almost closed and bounces back open. The facility calls for service. A technician adjusts the sweep and latch speed valves and increases spring tension. The door latches on calm days but still fails when wind picks up.

This is not a defective closer and it cannot be fixed with valve adjustments. It is a sizing problem. Parallel arm geometry reduces the closer's effective closing force by 20 to 25 percent. A size 4 closer in parallel arm delivers the latching force of roughly a size 3 in regular arm. On an exterior door fighting wind load or HVAC pressure, size 3 equivalent force is not enough. The door needs a size 5 in parallel arm to deliver size 4 equivalent force at the latch point.

The rule is simple and consistent: for parallel arm installation on any exterior door, specify one size higher than the door width table recommends. For exterior doors in high-rise buildings, buildings with significant HVAC pressure differentials across the door, or any door with heavy weather stripping that adds additional closing resistance, consider sizing up two steps and adjusting down from the field. A closer set to size 5 and backed down to size 4 in the field after installation is dramatically preferable to a closer set to size 4 that cannot be adjusted up enough to overcome real-world conditions. American Locksets confirms arm type and confirms parallel arm sizing adjustment before every door closer order ships. Call 877-471-4870 with door dimensions, swing direction, and arm type preference.

Why Choose American Locksets for Commercial Door Closers

American Locksets has been an authorized commercial hardware distributor since 2001, stocking Grade 1 commercial door closers from LCN, Norton, and Sargent across every arm configuration, size range, and specialty application including fire door hold-open, ADA-compliant interior, and weatherized exterior installations. The complete door closer catalog is at the commercial door closers section. Same-day shipping is available on stocked configurations.

Commercial door closers at American Locksets ship alongside exit devices and panic hardware, commercial mortise locks and lever locks, commercial door hinges, and builders hardware on a single authorized dealer order. For help confirming the correct size, arm type, and parallel arm sizing adjustment for any specific door, call 877-471-4870 before ordering.

Frequently Asked Questions About Commercial Door Closers

What do the ANSI door closer size numbers mean?

ANSI/BHMA A156.4 defines six closer sizes based on spring force. Size 1 is the lightest, appropriate for small or light interior doors. Size 6 is the heaviest, for extra-wide or very heavy exterior doors. Standard commercial interior doors at 36 inches typically take size 3. Standard exterior doors at 42 inches typically take size 4. Most commercial Grade 1 closers are field-adjustable from size 1 through 6 using a single unit, with the spring size set by the installer based on the actual door conditions after installation.

What is the difference between regular arm, parallel arm, and top jamb door closer mounting?

Regular arm mounts the closer body on the pull face of the door with the arm extending to the frame. It is the most power-efficient mounting. Parallel arm mounts the closer body on the push face with the arm running parallel to the door face. It is 20 to 25 percent less efficient than regular arm and is used where the closer must be on the secure interior side of an outswinging door. Top jamb mounts the closer body on the frame head with the arm extending to the door. It provides efficiency similar to regular arm and is used on storefront applications or when the door rail is too narrow for a body mount.

What ADA requirements apply to commercial door closers?

Under the 2010 ADA Standards Section 404.2.9, interior non-fire-rated doors on accessible routes must require no more than 5 pounds of force to open. The door must also close from 90 degrees to within 12 degrees of the latch in no less than 5 seconds minimum sweep time. A closer that is oversized for the door will require more than 5 pounds of opening force and must be adjusted or replaced. If meeting the 5-pound limit makes reliable latching impossible, the correct solution is a power operator, not a manual closer adjusted to minimum spring tension.

Can a door closer with a hold-open arm be used on a fire-rated door?

No. Standard mechanical hold-open arms are prohibited on fire-rated door assemblies under NFPA 80. Fire doors must close and positively latch whenever the door is released. For fire-rated doors that need to stand open during business hours, the code-compliant options are an electromagnetic hold-open device tied to the fire alarm panel, or a fusible link hold-open arm that releases at elevated temperature. The LCN 4040SE Sentronic is the fire alarm-integrated automatic hold-open closer stocked at American Locksets for fire door applications.

Why does my parallel arm door closer fail to latch on windy days?

This is almost always a parallel arm undersizing problem. Parallel arm geometry reduces effective closing force by 20 to 25 percent compared to regular arm at the same spring size. If the closer was sized using a standard door-width table without accounting for this efficiency reduction, the door will not latch reliably against wind or HVAC pressure. The fix is to step up one spring size (or increase spring tension on an adjustable-size closer) and verify latching under realistic conditions. Valve adjustment alone cannot resolve a sizing problem.

What is the difference between LCN 4040XP and Norton 7500 door closers?

Both are ANSI Grade 1 cast-iron commercial door closers with size 1 through 6 adjustment, UL 10C fire door listing, and ADA compliance capability. The LCN 4040XP is rated for 10 million or more cycles and carries a 30-year mechanical warranty, making it the correct specification for the highest-traffic exterior doors. The Norton 7500 is rated for 2 million or more cycles with a 25-year warranty at a lower price tier. The Norton 7500 tri-packs all three arm configurations in one box, simplifying ordering on mixed-arm projects. For lower-traffic or budget-driven applications, the 7500 is the better value. For maximum cycle life on institutional exterior doors, the 4040XP is the correct choice.

Which door closer brands does American Locksets carry?

American Locksets stocks Grade 1 commercial door closers from LCN (4040XP in all arm configurations, 4040SE Sentronic fire door hold-open, and 1460 heavy-duty series), Norton (7500 Series tri-pack), and Sargent (351 Series), all from authorized distribution. Same-day shipping is available on stocked configurations. The complete catalog is in the commercial door closers section at American Locksets with specification support at 877-471-4870.

The mortise lock is the workhorse of commercial door hardware. It handles the heaviest traffic, integrates with access control systems more cleanly than any other lock type, and when correctly specified and installed, will outlast the building it is put in. Schools, hospitals, government buildings, hotels, and office towers all run on mortise locks because nothing else matches the combination of security, durability, and functional flexibility that a properly specified Grade 1 mortise lock delivers. This guide covers everything you need to know before ordering: how a mortise lock works, what ANSI grades actually mean for performance, how to read function codes, the differences between the major brands, and when to choose a mortise lock over a cylindrical lock for a specific opening.

What Is a Commercial Mortise Lock?

A mortise lock is a lock body installed in a rectangular pocket, called the mortise, cut into the edge of the door. The lock case sits recessed inside the door rather than mounted on its face. This is the defining difference between mortise locks and cylindrical bored locks, which pass a cylinder through two round holes drilled through the door face. Because the mortise lock body is fully enclosed inside the door, it is significantly more resistant to forced entry, prying, and impact than a surface-mounted or cylindrical mechanism.

The mortise lock case contains the latchbolt, the deadbolt, the cylinder cam, and in many cases an auxiliary deadlatch that automatically deadlocks the latchbolt when the door closes. The trim, meaning the levers, roses, escutcheons, and cylinders, mounts to the door face and connects to the case through the door thickness. Function is determined by how the trim and case interact. A storeroom function lock keeps the outside lever locked at all times. A classroom function lock allows the outside lever to be locked or unlocked from inside without a key. An office function lock allows the outside lever to be locked or unlocked from outside with a key while the inside lever is always free. There are more than 20 standardized function codes defined by ANSI/BHMA, and the function you specify determines how the door operates for its occupants every day.

ANSI/BHMA Grades: What the Numbers Actually Mean

Every commercial mortise lock in the US market is tested and graded against ANSI/BHMA A156.13, the standard that governs mortise lock performance. The grading system has three levels, and the difference between them is not subtle.

Grade 1 is the commercial and institutional standard. Locks must survive 1 million operating cycles, withstand 10 blows of 75 foot-pounds to the strike plate, resist pick, drill, and forced-entry attack to defined tolerances, and pass torque testing at a minimum of 360 inch-pounds on the lever. This is the grade specified for schools, hospitals, government facilities, hotels, office buildings, and any door that sees heavy traffic or carries a security requirement. Every Schlage L Series, Sargent 8200, and Corbin Russwin ML2000 lock sold for commercial applications is Grade 1.

Grade 2 covers medium-duty commercial use. The cycle count drops to 250,000 and the impact and torque thresholds are lower. Grade 2 is appropriate for light commercial interiors, private offices with low traffic, and secondary doors in buildings where the primary entries use Grade 1 hardware. It is not appropriate for corridor doors, entry doors, or any door that will see sustained daily use.

Grade 3 is residential. It does not belong in a commercial hardware schedule. If a mortise lock does not specify its ANSI/BHMA grade, assume it is not Grade 1 and verify before ordering.

Mortise Lock Function Codes Explained

ANSI/BHMA standardizes mortise lock functions with F-codes. Most manufacturers cross-reference these codes with their own series designations, so a Schlage L9010 and a Sargent 8204 both perform the passage function but carry different part numbers. Knowing the F-code lets you compare locks across brands without confusion.

The classroom security intruder function (F32) is one worth calling out specifically. Standard classroom function (F84) requires someone to be inside the room to lock the door. The F32 intruder function allows a teacher or security officer to lock the outside lever from either side of the door using a key, without entering the room. This became a significant specification requirement at K-12 schools following updated IBC guidance on lockdown capabilities. If a school project does not specify F32 on classroom doors, it should. Sargent designates this function G10; Schlage uses L9070.

Mortise Lock vs. Cylindrical Lock: When to Use Each

Both lock types have a place in a commercial hardware schedule. The mistake is using the wrong one for a given application, not choosing one category over the other universally.

Mortise locks are the correct choice for exterior doors and primary entry points at any building type, corridor doors in schools and healthcare facilities, any door in an access control system that requires electrified locking with multiple function options, doors in high-traffic applications where the lock will cycle hundreds of times per day, and any opening where the architecture requires a full escutcheon rather than a rose plate.

Cylindrical locks are the correct choice for interior secondary doors in office environments where traffic is low to moderate, private offices that do not carry a security requirement beyond basic access control, and interior doors where the budget does not support mortise specifications and Grade 1 cylindrical hardware meets the performance requirement. The Schlage ND Series and Sargent 10-Line are the Grade 1 cylindrical standards for commercial work. They are serious products that handle commercial use reliably.

The practical test is this: if the door fails or the lock is compromised, what is the consequence? On an exterior entry or a corridor door in a school, the consequence is severe. Specify mortise Grade 1. On a private office interior door in a low-traffic professional building, the consequence is minimal. Grade 1 cylindrical is adequate and costs less to purchase and install.

The Major Commercial Mortise Lock Brands

Four manufacturers dominate commercial mortise lock specifications in North America. All four are available at americanlocksets.com/commercial-locks.

Schlage L Series

The Schlage L9000 Series is the most specified mortise lock in US commercial construction. It is ANSI/BHMA Grade 1, available in every standard function code, and compatible with Schlage's full range of trim, cylinder, and access control options. The L Series uses a 13-gauge steel case, a 1-inch deadbolt, and a full-length adjustable backset. The Vandlgard option adds a reinforced cylinder guard that resists cylinder pulling attacks. The L Series integrates with Allegion's Schlage electronic trim for credential-based access without replacing the lock body. If a project runs Schlage hardware throughout, the L9000 is the mortise specification baseline. Schlage also offers the Everest and Primus key systems for master key programs that require high-security cylinders resistant to key duplication.

Sargent 8200 Series

The Sargent 8200 is the benchmark for high-cycle institutional environments. Sargent rates it to 14 million cycles, which is 14 times the ANSI Grade 1 minimum, and it carries Miami-Dade hurricane certification alongside standard ANSI testing. The 12-gauge wrought steel case is heavier than most competitors. The 8200 is the lock of choice for behavioral health facilities because Sargent manufactures the broadest range of ligature-resistant trim options: BHW (behavioral health wide escutcheon), ALP (anti-ligature patient trim), and BHL (behavioral health lever) are all factory-specified and cannot be added in the field. If a healthcare or institutional project needs mortise locks, the Sargent 8200 is the product that handles it without requiring custom fabrication. Sargent's SFIC compatibility is cross-manufacturer within the ASSA ABLOY family, so a building using Sargent locks can share a masterkey infrastructure with Yale and Corbin Russwin hardware on the same campus.

Corbin Russwin ML2000 Series

The Corbin Russwin ML2000 is specified heavily on government, institutional, and healthcare projects where the specification calls for heavy-gauge construction and a full function range. The ML2000 is built from heavy-gauge steel with a patented anti-back-drive feature that prevents the latch from being manipulated from outside the door. Status indicator options show occupancy or locked/unlocked status through a visible window in the escutcheon, which is a practical feature on hospital patient rooms and occupancy-sensitive spaces. The Motorized Electric Latch Retraction (MELR) option allows the lock to release under power for access control applications without a separate electric strike. Corbin Russwin SFIC cylinders are cross-compatible with Sargent and Yale cores within the ASSA ABLOY ecosystem.

Best 45H Series

The Best 45H uses the Small Format Interchangeable Core (SFIC) system, which allows cylinders to be changed in the field in seconds using a control key rather than requiring a locksmith or new hardware. For facilities managing large key programs across many doors, the Best SFIC system significantly reduces the cost and time of rekeying compared to standard keyed cylinders. The 45H is a Grade 1 mortise lock with the same performance floor as the Schlage and Sargent products. Best SFIC cores are compatible with other manufacturers using the SFIC format including Arrow and Falcon, which simplifies multi-manufacturer key programs across a campus or multi-building facility.

Electrified Mortise Locks

Electrified mortise locks add an electrical mechanism to the standard mechanical lock body that allows the lock to be controlled by an access control system. This is how commercial buildings integrate locks with card readers, keypads, intercoms, and building management systems. There are two basic configurations.

Fail-safe electrified mortise locks are unlocked when power is removed. This is required on egress doors in most fire and life safety applications because in a power failure or fire alarm activation, the doors must open freely for evacuation. Fail-safe is the correct specification for primary egress doors, stairwell doors, and corridor doors in occupied spaces.

Fail-secure electrified mortise locks remain locked when power is removed. This is appropriate for high-security areas where the consequence of an unlocked door during a power failure is unacceptable, such as server rooms, evidence storage, pharmacy areas, and controlled substance storage. Fail-secure is not appropriate on egress doors.

Most major mortise lock manufacturers offer electrified versions of their Grade 1 products. The Schlage L9000 with electrified option, Sargent 8270 (fail-safe) and 8271 (fail-secure), and Corbin Russwin MELR versions all integrate directly with standard commercial access control systems. When ordering an electrified mortise lock, confirm the power supply requirement, the voltage range, and whether the lock requires a dedicated access control power supply or can run from a standard 24VDC source.

Key Control Systems and Master Keying

For any commercial project managing more than a handful of doors, key control matters as much as the lock specification. A facility with 50 doors and no key control plan ends up with keys being duplicated by hardware stores, terminated employees who kept copies, and no practical way to rekey selectively without changing every lock on the floor.

Restricted key systems prevent unauthorized duplication. Schlage Everest and Primus cylinders use patented keyways that cannot be legally duplicated without authorization from the building's key control account. Medeco and Mul-T-Lock offer third-party restricted cylinders that retrofit into mortise lock bodies from any major manufacturer. For projects where key security is a documented requirement, restricted cylinders are the right specification at a modest cost premium over standard cylinders.

Interchangeable core systems, including Best SFIC and Corbin Russwin SFIC, solve a different problem: they allow cylinders to be swapped in seconds using a control key, eliminating the cost of locksmith service for routine rekeying. SFIC is the standard for hotels, universities, and multi-tenant commercial buildings where keys change frequently.

Master key systems allow a single key to operate multiple locks while individual keys operate only their assigned lock. Virtually every major mortise lock manufacturer supports master key and grand master key programs. The specification has to define the hierarchy, the key quantity at each level, and the cylinder type before the first lock ships, because master key programs cannot be easily changed after cylinders are ordered and cut.

Installation Considerations

Mortise locks require a mortise pocket cut into the door edge that precisely matches the lock case dimensions. On hollow metal doors, this pocket is typically pre-punched at the factory to match a specific lock prep. On wood doors, the pocket is routed to specification. The backset, which is the distance from the door edge to the center of the cylinder, must be measured before ordering. Standard commercial backsets are 2-3/4 inches on most mortise locks, but 2-3/8 inches is also common on narrower door edges. The wrong backset means the cylinder does not line up with the cylinder guard and the lever geometry is off.

Door thickness also matters. Standard commercial doors are 1-3/4 inches thick. The mortise lock trim package is ordered to the door thickness. If a door is thicker, such as a sound-rated door or a lead-lined door in a radiology suite, the trim spindle and cylinder length must be specified to match. Ordering standard trim on a 2-inch door results in a trim package that does not seat correctly.

On paired doors, the mortise lock on the active leaf needs to be coordinated with the hardware on the inactive leaf, which typically carries automatic flush bolts and an astragal. The lock function, backset, and prep location all have to align between the two doors. Ordering both leaves separately without cross-checking the hardware schedule is a common source of field errors that require re-ordering.

Why Choose American Locksets for Commercial Mortise Locks

American Locksets is an authorized distributor for every major commercial lock brand covered in this guide: Schlage, Sargent, Corbin Russwin, Best, Yale, Arrow, and Cal Royal. The full commercial mortise lock catalog is at americanlocksets.com/commercial-locks, where you can shop by brand, function, or lock series. Same-day shipping is available from multiple US warehouses on stocked products.

For projects that require a hardware schedule review or a quote on a multi-door specification, the American Locksets team can work through function codes, ANSI grades, keying requirements, and electrified options before the order is placed. Related hardware including exit devices and panic bars, commercial door hinges, and builders hardware ships on the same order. For residential deadbolts and lever sets, browse residential locks. Call 877-471-4870 to confirm specifications or request a project quote.

Frequently Asked Questions

What is a mortise lock and how is it different from a cylindrical lock?

A mortise lock installs in a rectangular pocket cut into the door edge, with the full lock case recessed inside the door. A cylindrical lock installs through two round bored holes in the door face. Mortise locks are heavier, more resistant to forced entry, and support a wider range of functions and access control integrations. Cylindrical locks are easier to install and cost less, making them appropriate for lower-security interior applications.

What ANSI grade do I need for a commercial door?

Grade 1 is required for commercial applications, including exterior doors, corridor doors, school and healthcare doors, and any high-traffic opening. Grade 1 mortise locks are tested to 1 million cycles and withstand 10 blows of 75 foot-pounds to the strike. Grade 2 is acceptable for light commercial interior doors with low traffic. Grade 3 is residential only.

What does the function code on a mortise lock mean?

The function code, standardized by ANSI/BHMA, determines how the lock operates. It specifies whether the outside lever can be locked, how it is locked (by key, by button, or automatically), and whether the inside lever is always free. Common codes include passage (both levers always free), storeroom (outside lever always locked), office (outside lever locked or unlocked by key), and classroom (outside lever locked from inside without a key). Always confirm the correct function code before ordering because changing function after installation requires replacing the lock case.

What is the difference between fail-safe and fail-secure on an electrified mortise lock?

Fail-safe unlocks when power is removed. It is required on egress doors where occupants must be able to exit freely in a fire or power failure. Fail-secure stays locked when power is removed. It is appropriate for high-security spaces like server rooms or pharmacy storage where an unlocked door during a power failure creates a security risk. Fail-secure is never appropriate on doors that serve as egress paths under life safety codes.

Which mortise lock brands does American Locksets carry?

American Locksets stocks mortise locks from Schlage, Sargent, Corbin Russwin, Best, Yale, Arrow, and Cal Royal. All products are available from authorized distribution with the full manufacturer warranty. Same-day shipping is available on stocked items from multiple US warehouse locations.

What is the classroom security (intruder) function and when is it required?

The classroom security intruder function (ANSI F32, Schlage L9070, Sargent G10) allows the outside lever to be locked from either side of the door using a key, without the key-holder needing to enter the room. Standard classroom function (F84) requires someone to be inside to lock the door. The F32 function is specified on school corridor and classroom doors in response to IBC and state building code requirements for lockdown capability on educational occupancy doors. It is a specific order item and cannot be converted from standard classroom function in the field.

Can I rekey a mortise lock without replacing the entire lock body?

Yes. Standard mortise lock cylinders are removed by inserting the key, turning it to a specific position, and using a release tool to slide the cylinder out. A new or rekeyed cylinder drops in and is secured without tools on most designs. Interchangeable core systems like Best SFIC allow cylinder changes in seconds using a control key with no tools and no locksmith required. Master key programs and restricted key systems are set at the cylinder level, not the lock body, so rekeying or upgrading key security does not require replacing the lock case.

Choosing a door lock sounds simple until you're standing in front of a hardware schedule, a product catalog, or a door that keeps failing. The truth is there are more than a dozen distinct lock types, and each one exists because a specific door, application, or security need demanded it.

This guide covers every major door lock type- what it is, how it works, where it belongs, and what to look for when buying. Whether you're outfitting a commercial building or replacing a worn-out lock at home, you'll know exactly what you need by the end.

About Door Locks and How They're Categorized

Door locks fall into three categories: mechanical design (how the lock body is built), function (how it operates when you use a key, lever, or credential), and grade (how well it performs under standardized testing).

The ANSI/BHMA grading system is the one that matters most for commercial buyers. Grade 1 is the highest- required on all primary commercial doors, corridors, and egress paths. Grade 2 suits lighter interior applications. Grade 3 is residential only and has no place in a commercial building spec.

Mortise Locks

A mortise lock fits inside a rectangular pocket cut into the door edge. The entire mechanism- latch, deadbolt, and internal parts- lives in a single steel case. Trim (levers and cylinders) mounts through the door face and connects to the case with through-bolts running the full thickness of the door.

That design is why mortise locks are the toughest option in commercial hardware. The steel case absorbs lateral force directly. There's no exposed spindle to shear under pressure. And because the deadbolt is part of the same body as the latch, you get full security in a single unit.

Best for: School corridors, hospital entries, government buildings, main building entries, any door with heavy daily traffic.

Brands to know: Schlage L Series, Sargent 8200 Series, Corbin Russwin ML2000, BEST 45H Series.

Standard: ANSI/BHMA A156.13 Grade 1- 1,000,000 cycles minimum.

Browse the mortise lock catalog at American Locksets.

Cylindrical Locks

Cylindrical locks install through two bored holes in the door face- a 2-1/8" hole for the lock body and a 1" hole for the latch. They're faster to install than mortise locks, cost less per opening, and still come in Grade 1 for commercial applications.

They're the most commonly used lock type in commercial buildings because they cover the majority of interior and secondary doors perfectly well. The trade-off is structural- on a door that gets hammered hundreds of times a day, the lighter chassis of a cylindrical lock wears faster than a mortise body. Save mortise for primary entries; cylindrical works great everywhere else.

Best for: Interior office doors, conference rooms, storage rooms, secondary entries with moderate daily use.

Brands to know: Schlage ND Series, Sargent 10 Line, Corbin Russwin CL Series, BEST 9K Series.

Standard: ANSI/BHMA A156.2 Grade 1- 1,000,000 cycles minimum.

Deadbolt Locks

A deadbolt is a bolt that only moves when you deliberately operate it- by key, thumbturn, or electronic credential. It has no spring action, so it can't be shimmed or pushed back by pressure on the bolt face.

There are two main types:

Single-cylinder deadbolt: Key outside, thumbturn inside. The inside thumbturn lets occupants exit without a key. Correct for exterior building doors and retail entries where overnight security matters.

Double-cylinder deadbolt: Key required on both sides. No thumbturn. Higher forced-entry resistance but creates an egress hazard if used incorrectly. Only appropriate on specific restricted-access doors where the local authority explicitly permits it- never on a required egress path.

Best for: Exterior doors as supplemental security, retail back-of-house entries, storage rooms.

Browse commercial deadbolts at American Locksets.

Knob Locks

Knob locks use the same basic mechanism as cylindrical locks but replace the lever with a round knob. They're largely obsolete in commercial settings because ADA Section 404.2.7 prohibits hardware that requires tight grasping, pinching, or twisting on accessible routes- which covers nearly every door in a public commercial building.

They still have a place in non-accessible utility closets and private spaces that aren't on required accessible routes. If you're upgrading hardware across a building, replace any knob lock on a public corridor or accessible route with lever hardware.

Best for: Non-accessible utility spaces only. Not suitable for public-use commercial doors.

Electrified Locks

Electrified locks are standard Grade 1 mortise or cylindrical locks with an integrated solenoid or motor that controls whether the outside lever works, based on a signal from an access control system, card reader, or remote switch.

Two functions define every electrified lock:

Fail safe (EL- Electrically Locked): Power holds the door locked. Lose power and the door unlocks. Right for egress corridors and fire alarm-integrated entries.

Fail secure (EU- Electrically Unlocked): Power allows entry. Lose power and the door locks. Right for server rooms, pharmacies, and any restricted area where losing power should never leave the door open.

This is not a reversible field decision on most models. Get the function right before you order. The Schlage L9095 is one of the few with a field-selectable switch if you need flexibility.

Best for: Main building entries with access control, healthcare corridors, restricted-access rooms.

Browse electrified locks at American Locksets.

Keypad and Proximity Locks

Keypad and proximity locks replace the physical key with a PIN, a proximity card, or both. Users enter a code or tap a credential to operate the latch. No key required for routine access, and most models run on AA batteries- no hardwiring needed.

The Alarm Lock Trilogy series is the commercial standard here:

• DL2700: 100 user codes, no scheduling, no audit trail. Simple standalone applications.

• DL3200: 2,000 user codes, 150 scheduled events, 40,000-event audit trail. Standard for mid-size facilities.

• DL4100: 500 scheduled events, privacy mode, residency mode, full audit trail. Healthcare and institutional standard.

These locks are ideal anywhere you need to manage who gets in without running network cable to every door.

Best for: Healthcare staff areas, school offices, restricted rooms, rental properties, any space needing credential management without full access control infrastructure.

Browse keypad and proximity locks at American Locksets.

Exit Devices (Panic Bars)

Exit devices- also called panic bars, push bars, or crash bars- are required by code on commercial doors serving 50 or more occupants in assembly, educational, or high-hazard occupancies (IBC Section 1010.1.9). Push the horizontal bar and the door opens, no grip or key required. Operating force must be 15 lbs or less (5 lbs on ADA-accessible egress routes).

Four types cover different door configurations:

Rim devices: Single center latch. Most common for single exterior commercial doors. Von Duprin 98/99 Series, Sargent 8800 Series.

Surface vertical rod (SVR): Three-point latching (center, head, floor). For paired doors without a center mullion. Von Duprin 9827/9927.

Concealed vertical rod (CVR): Same three-point latching but rods run inside the door. Cleaner appearance for architectural applications.

Mortise exit devices: Full mortise lock integrated with push bar function. For primary entries needing key-controlled outside access alongside panic egress.

One important distinction: standard panic hardware can be mechanically dogged (held open). Fire exit hardware- required on fire-rated door assemblies- carries UL 10C listing and cannot use mechanical dogging because fire doors must positively latch on every close.

Best for: All egress doors in commercial occupancies where code requires panic hardware.

Browse exit hardware at American Locksets.

Magnetic Locks (Maglocks)

Magnetic locks use an electromagnet mounted on the door frame and an armature plate on the door. When energized, the magnet holds the door shut with 600–1,500 lbs of force depending on the model. Cut power and the door is immediately free to open.

Maglocks are always fail safe by design- no power, no magnetic hold, door is free. That makes them a natural fit for egress paths, but fire alarm integration is required so the magnet releases automatically during a fire event.

The limitation of maglocks is that they provide holding force only, not a projecting bolt. That makes them better suited for glass and aluminum storefront doors where a mortise prep isn't available, rather than high-security applications where a bolt engagement is needed.

Best for: Aluminum storefront and glass doors, lobby access points, doors where immediate remote release is the priority.

Browse magnetic locks at American Locksets.

Padlocks

Padlocks are portable, self-contained locks with a shackle that passes through a hasp, chain, or staple. Commercial-grade padlocks use hardened steel or boron-carbide shackles and multi-pin cylinders that resist cutting, prying, and picking at a level well above consumer hardware.

They don't get specified on interior commercial doors, but they're the right answer for outdoor gates, storage yards, equipment enclosures, and any application where permanent hardware isn't practical.

Best for: Outdoor gates, job site trailers, storage lockers, equipment yards, utility and infrastructure access points.

Storefront Locks

Storefront locks are narrow-profile locks built for the thin aluminum stile frames of commercial glass storefront doors. Standard commercial mortise and cylindrical locks don't fit these frames- storefront stiles are typically 1-3/4" to 2" wide. Adams Rite is the industry-standard brand here: the MS Series hookbolt and 4500 Series deadlatch cover most storefront applications in North American commercial construction.

Best for: Retail glass entries, office tower lobbies, glass vestibule doors, any aluminum storefront frame where standard door prep doesn't exist.

How Lock Function Codes Work

Every commercial lock ships in a specific function that defines how the inside and outside levers behave. You can't change the function in the field without replacing the lock body- so getting this right before ordering matters.

The most common functions:

The classroom function is the one that trips people up most often- it looks identical to an office lock on the outside but works completely differently during a lockdown drill.

Why American Locksets

American Locksets has supplied commercial door hardware from authorized distribution since 2001. Every lock on this page- mortise, cylindrical, electrified, exit hardware, keypad/prox- is stocked from Schlage, Sargent, Corbin Russwin, BEST, Falcon, and Cal-Royal with current manufacturer warranty.

Call 877-471-4870 before ordering to confirm function code, grade, core prep, and backset. Same-day shipping from multiple US warehouses.

Frequently Asked Questions

What's the difference between a mortise lock and a cylindrical lock? 

A mortise lock fits in a pocket in the door edge and houses everything in a single steel case. A cylindrical lock installs through bored holes in the door face. Mortise is stronger and suits high-traffic institutional doors. Cylindrical is faster to install and works well for interior secondary doors.

When is Grade 1 required?

 On all primary commercial entries, corridors, egress doors, and fire-rated assemblies. Grade 1 is the commercial baseline under ANSI/BHMA standards- not an upgrade.

Can I use a knob lock on a commercial door? 

Not on accessible routes. ADA requires lever hardware on any door on a required accessible route. Knob locks are only permissible on non-accessible utility spaces.

What's the difference between fail safe and fail secure? 

Fail safe unlocks when power is lost- for egress corridors. Fail secure locks when power is lost- for server rooms and pharmacies. Must be specified at order time on most electrified locks.

Where can I buy commercial locks from an authorized dealer?

 American Locksets stocks the complete range at americanlocksets.com. Call 877-471-4870 to confirm specs before ordering.

Published by the American Locksets Hardware Team. Authorized Allegion, Assa Abloy, and dormakaba Dealer, Est. 2001, Monroe, NY.

HES 5000 faceplate selection is the first decision after confirming the HES 5000 as the correct electric strike for the opening. The HES 5000 strike body ships separately from faceplates. The faceplate determines whether the strike seats correctly in the frame, whether the corner geometry matches the frame profile, and whether the mounting system provides adequate pull strength for the rated 1,500-pound static load. Ordering the wrong HES 5000 faceplate produces a strike that either does not seat flush in the frame pocket, leaves visible gaps at the edges, or uses a two-point mounting pattern inadequate for the frame material. This guide explains every HES 5000 faceplate option with the exact dimensions, corner style, mounting system, and frame application for each.

Why the HES 5000 Faceplate Is a Separate Decision

Unlike some electric strikes that ship with a single fixed faceplate, the HES 5000 system separates the strike body from the faceplate to accommodate the full range of commercial frame types - hollow metal, aluminum, and wood - without requiring a different strike body for each frame material. The strike body is identical across all configurations. The faceplate changes to match the frame.

The HES 5000C Complete Pac simplifies ordering for the two most common commercial frame types by bundling the strike body with both faceplate 501 and faceplate 501A in a single package. For wood frames or extended aluminum frames, the additional faceplate ships as a separate line item.

Faceplate 501: Standard ANSI Hollow Metal Frames

The 501 is the correct HES 5000 faceplate for the most common commercial frame type: standard hollow metal door frames with ANSI-standard mortise strike preparation. Square corners match the ANSI hollow metal frame cutout exactly. The 4-7/8 inch by 1-1/4 inch dimension covers the full standard strike pocket without overhang.

Any standard commercial project with hollow metal door frames - offices, schools, hospitals, and government buildings - specifies the 501 faceplate for cylindrical lock applications.

Faceplate 501A: Aluminum Storefront Frames

The 501A is the correct HES 5000 faceplate for aluminum storefront frames. Radius corners match aluminum frame profiles where square corners would overlap the frame edge geometry. Universal mounting tabs provide adjustment flexibility for aluminum frame variations without requiring a precise ANSI cutout. The 5000C Complete Pac includes both the 501 and 501A, covering hollow metal and aluminum frame applications in one order.

Faceplate 502: Extended Aluminum Frames

The 502 is specified when the aluminum frame's strike pocket exceeds what the standard 4-7/8 inch 501A covers. On commercial aluminum frames with non-standard or extended mortise preparation, the 502's 7-15/16 inch length covers the full frame face without gaps. If the 501A leaves an uncovered pocket edge visible, the 502 is the correct upgrade.

Faceplate 503: Intermediate Length Aluminum

The 503 bridges the gap between the standard 4-7/8 inch 501A and the extended 7-15/16 inch 502. Used on specialty frame configurations where the 501A is too short and the 502 is wider than the frame requires.

Faceplate 504: Wood Frames with Four-Point Mounting

The 504 is the only HES 5000 faceplate that uses four-point mounting. This is a structural requirement, not a stylistic choice. Wood does not have the density and rigidity of hollow metal - two-point mounting on a wood frame does not distribute the 1,500-pound static load pull force adequately across the frame material. Four-point mounting spreads the load across four fastener points, maintaining the rated pull strength in wood construction.

For wood frame installations without the 504 four-point faceplate, the HES 5000 may pull out of the frame before reaching its rated 1,500-pound static limit.

HES 5000 Faceplate Selection Decision Tree

Frame material is hollow metal with standard ANSI prep?

 Specify Faceplate 501.

Frame material is aluminum storefront?

 Start with Faceplate 501A. If the standard 4-7/8 inch length does not cover the full strike pocket, measure the pocket and specify 503 or 502 accordingly.

Frame material is wood?

 Specify Faceplate 504 with four-point mounting. No other faceplate provides adequate pull strength in wood frames.

Need to cover both hollow metal and aluminum in one order? 

Specify HES 5000C Complete Pac - includes strike body, Faceplate 501, and Faceplate 501A.

Why American Locksets for HES 5000 Faceplate Orders

Faceplate selection is confirmed at order time. American Locksets asks for the frame type and material before shipping any HES 5000 order. The most common faceplate error - 501A ordered for a hollow metal frame - produces a strike that does not seat flush due to the radius corners overlapping the square hollow metal cutout. The second most common error - 501 ordered for a wood frame - produces a two-point mounting on wood without adequate pull strength. Both result in return shipments. Confirm the frame type before the order is placed. Call 877-471-4870 or visit the electric strikes section.

Conclusion

HES 5000 faceplate selection: 501 for ANSI hollow metal frames with square corners, 501A for aluminum frames with radius corners and universal mounting tabs, 502 for extended aluminum prep, 503 for intermediate aluminum, 504 for wood frames with mandatory four-point mounting. The 5000C Complete Pac includes the strike body plus both 501 and 501A for the two most common commercial frame types. Wrong faceplate means the strike does not seat correctly. Confirm frame type before ordering. Call 877-471-4870.

Frequently Asked Questions

Which HES 5000 faceplate is for hollow metal frames?

 Faceplate 501- 4-7/8 x 1-1/4 inch, square corners, for standard ANSI hollow metal jambs.

Which HES 5000 faceplate is for aluminum frames? 

Faceplate 501A - 4-7/8 x 1-1/4 inch, radius corners, with universal mounting tabs for aluminum frame variations.

Why does the 504 wood faceplate use four-point mounting?

 Wood lacks the rigidity of hollow metal. Four-point mounting distributes the 1,500-pound rated pull force across four fastener points to maintain rated strength in wood frames.

What is the HES 5000C Complete Pac? 

The strike body packaged with both Faceplate 501 and Faceplate 501A -covering hollow metal and aluminum frames in one order.

When do I need Faceplate 502 instead of 501A?

 When the aluminum frame's strike pocket is wider than the standard 4-7/8 inch 501A covers. Measure the pocket first.

Published by the American Locksets Hardware Team. Authorized ASSA ABLOY Dealer, Est. 2001, Monroe, NY.