Accentra (Yale) AU4601LN Grade 2 Passage/Closet Latch Cylindrical Lock, Augusta Lever

The Accentra AU4601 is a Grade 2 passage latch designed for doors where locking isn't needed but reliable operation and professional appearance matter. This non-keyed cylindrical lock features the elegant Augusta lever design with a 2-3/4" backset, meeting ANSI/BHMA F75 specifications for non-keyed passage function. Both levers operate freely at all times, allowing instant egress without requiring keys or complex hardware. The 4600LN series delivers proven security and durability for commercial buildings, schools, hospitals, retail spaces, apartments, and institutional facilities needing straightforward passage hardware at an economical price point.

When to use a passage latch versus keyed locks

Passage latches belong on doors where access control isn't required, like hallways, closets, pantries, interior common areas, and bathrooms in commercial settings. Unlike office or storeroom locks that limit entry, passage latches allow anyone inside or outside to operate both levers freely. This makes them ideal for spaces where foot traffic is constant and security isn't the priority. You'd pair passage latches with other hardware in buildings where some doors need keys (offices, storage) while others remain openly accessible (corridors, break rooms). The AU4601's non-keyed design eliminates key management complexity and maintenance costs, making it perfect for high-traffic commercial environments.

Grade 2 certification and fire-rating for commercial doors

The AU4601 is certified to ANSI/BHMA A156.2, Series 4000, Grade 2 standards and UL-listed for 3-hour fire-rated door applications. Grade 2 locks balance durability with economy, capable of withstanding approximately 400,000 door cycles in standard commercial settings. This certification means the lock meets minimum strength and reliability requirements for office buildings, educational facilities, healthcare settings, and government buildings. The 3-hour fire rating allows installation on fire-rated assemblies without compromising the door's protective rating. The brass and bronze construction resists corrosion while the fixed lever design prevents sag and wobble common in lighter-duty hardware.

Installation specifications for the 2-3/4 backset and door thickness

The AU4601 fits doors between 1-3/8" and 1-3/4" thick, accommodating standard commercial hollow-core and solid wood doors. The 2-3/4" backset is the industry standard measurement on commercial locks, matching existing door preps and simplifying replacement of worn latches without door re-drilling. The 2-1/8" bore and round rose design (3-3/8" diameter) provide clean architectural appearance while maintaining proper mechanical tolerances. Installation requires drilling one 1" hole for the latch and two 5/16" holes for the lever mounting. The non-handed design works on both left and right swing doors without modification. Standard ASA strike and fasteners ship with the lock.

Augusta lever design and finish options for commercial aesthetics

The Augusta lever offers a clean, professional appearance that coordinates with modern and traditional architectural styles. The lever's straight return design prevents catching on clothing and provides ergonomic operation across all user abilities. Multiple finish options include satin chrome, oil-rubbed bronze, bright brass, and stainless steel, allowing color coordination with other door hardware and building finishes. The 4600LN series pairs with compatible strike plates and door hardware for cohesive installations across large commercial projects. Whether specifying new construction or retrofit applications, the AU4601 delivers the durability, fire-rating compliance, and aesthetic consistency facility managers and architects expect from Grade 2 commercial hardware.

The Accentra AU4601 provides reliable, code-compliant passage latch function for buildings where consistency and durability drive hardware selections. From school corridors to hospital hallways to retail common areas, this Grade 2 cylindrical lock handles high-traffic doors without the maintenance burden of keyed systems. Browse our complete selection of Accentra cylindrical lever locks in all functions and finishes, or call 877-471-4870 to specify the right passage hardware for your commercial project.