PDQ MR115,J Series Grade 1 Extra Heavy Duty Storeroom Mortise Lock

The PDQ MR115J is a Grade 1 extra heavy duty storeroom mortise lock from PDQ's MR Series, fitted with J Series escutcheon trim and assembled in Lancaster, PA. The outside lever is always rigid: turning it without a key does nothing. Entry requires a key in the outside cylinder to retract the latch. The inside lever is always free, providing immediate egress without a key at any time. Certified to ANSI/BHMA A156.13 Operational and Security Grade 1 and UL/CUL 10C listed for 3-hour fire door assemblies. The lockcase is 12-gauge cold-rolled steel, cycle tested to over 11 million cycles, and protected under US Patent 5,813,255.

MR115 storeroom function and where it belongs

Storeroom function is the highest-security standard function in commercial mortise lock hardware. The outside lever is mechanically rigid regardless of what happens on the interior side. There's no push button, no thumbturn, and no tool override that releases the outside lever without a key. The auxiliary latch deadlocks the main latchbolt the moment the door closes into the frame, which prevents shimming and external latch manipulation from the door edge gap. The inside lever is always free and always allows egress, satisfying life safety requirements on all applicable occupancy types.

The MR115 is specified for server rooms, pharmacy corridors, evidence rooms, equipment storage, classified document areas, and any commercial or institutional space where unrestricted public access creates a security or compliance risk. Because the inside lever is always free, occupants can exit without a key under any condition, which is the code-compliant behavior for a storeroom function door on an egress path.

J Series escutcheon, JW Wide option, and BJSJ ordering codes

The J in MR115J refers to PDQ's J Series sectional trim. The escutcheon mounts through the door in the standard configuration and provides a finished trim plate around the lever and cylinder on both door faces. For retrofit installations where the existing door already has hole patterns from a prior mortise lock, PDQ offers the JW (J Wide) escutcheon variant. The JW has a larger face plate that covers the previous fastener holes, allowing a clean installation without door patching. The JW trim also complies with Unified Facilities Guide Specification 08 71 00, making it the correct specification for federal projects requiring that standard.

If a hardware schedule or spec sheet shows a code like "BJSJ," that's PDQ's lever-trim-finish ordering syntax. B is the Boston lever, one of 10 standard lever designs in the PDQ lineup. J identifies the J Series escutcheon. The last two characters designate the specific finish. Confirm the exact finish code with the hardware schedule before ordering if the spec sheet doesn't spell it out explicitly.

Cycle testing, materials, cylinder options, and finishes

The MR Series lockcase is 12-gauge cold-rolled steel. PDQ's published cycle test result exceeds 11 million cycles, which is more than 11 times the BHMA standard cycle requirement for Grade 1 mortise locks. The reduced-part count design protected under US Patent 5,813,255 contributes to both the longevity result and the field reversibility of the MR115. Handing can be changed on-site without returning the lock to the factory, which reduces installation errors and retrofit complexity.

Standard cylinder is 6 or 7-pin brass in Schlage C keyway. Large format interchangeable core (Schlage LFIC) and small format interchangeable core (SFIC) options are available at ordering. The cylinder is also compatible with Best, Falcon, and Arrow core formats, covering the major institutional master key system platforms. Six finishes are available: 605 bright brass, 606 satin brass, 612 satin bronze, 613 oil rubbed bronze, 629 bright stainless, and 630 satin stainless. Browse the complete PDQ MR J Series catalog for other functions available in the same trim and lockcase platform. The full PDQ MR Series covers all escutcheon trim options and functions across the MR line. For the broader range of commercial mortise locks across all brands and grades available on this site, that section is available for comparison.

Select your lever style, escutcheon type (J standard or JW wide), finish, and cylinder/core option when ordering. Confirm door handing before installation, as the MR115 is field reversible but it's best to confirm handing before the lockcase is installed in the door prep.