Falcon MA531 Grade 1 Apartment Corridor Door Mortise Lock

The Falcon MA531 is a Grade 1 apartment/corridor mortise lock built for multi-family residential, dormitory, healthcare, and commercial corridor applications where the outside lever must be lockable by staff from the door face without a key. It uses the ANSI F12/F20 function code, combining a 1" deadbolt with a latch bolt, outside lever control via buttons in the door face, and an inside lever that always allows free egress. It belongs to the Falcon MA Series under Mortise Locks within Commercial Locks.

How does the ANSI F12/F20 apartment corridor function work on the Falcon MA531?

Plain English: the inside lever always retracts both the latch bolt and the dead bolt for immediate egress. The outside lever is controlled by buttons embedded in the door face: pressing the buttons makes the outside lever inoperative (locked); pressing again releases it. A key from outside operates both bolts regardless of button state and retracts the dead bolt to leave the outside unlocked for the next entry. When the deadbolt is thrown, the latch bolt deadlocks automatically, preventing shimming or credit-card attacks. The button-in-face control is exactly what makes F12/F20 specific to apartment corridors and residence hall entries: staff can secure the building's corridor at the end of a shift from the door face without carrying or activating a key.

What makes the Falcon MA531 field-reversible without opening the mortise case?

Most mortise locks require the case to be opened and internal components repositioned to change handing from right-hand to left-hand. The MA531 is engineered to rehang in the field without opening the mortise case, so a single stocked SKU installs on any door swing without a separate left-hand order or trip back to the supplier. This is the key installation advantage for contractors and facility maintenance teams managing mixed-door-swing projects. Handing is reversed externally in seconds with no additional tools required.

How does the Falcon MA531 compare to the Schlage L9456 corridor and L9060 apartment mortise lock?

The Schlage L9456 is the direct comparable from Schlage's L9000 Series: Grade 1, field-reversible, corridor mortise function. For apartment entrance applications specifically, the Schlage L9060 is the function-matched alternative. All three carry ANSI/BHMA Grade 1 and UL 3-hour ratings. The MA531 is positioned as the higher-value option in the Grade 1 mortise category: solid brass cylinders, hardened steel hubs, and the 156.13 Series 1000 certification at a lower price point than the Schlage L-Series. The practical specification decision is usually the keying system: the MA531 uses G keyway standard (A keyway on IC), while Schlage L9000 Series uses the 06 keyway. Match the mortise lock to your project's existing key system first.

Lever, escutcheon, finish, and cylinder options for the Falcon MA531

Eight trim combinations: Dane/Napa (DN), Quantum/Napa (QN), Sutro/Napa (SN), Hana/Napa (HN), Dane/Gala (DG), Quantum/Gala (QG), Sutro/Gala (SG), Hana/Gala (HG). Finishes: 605 Bright Brass, 606 Satin Brass, 625 Bright Chrome, 626 Satin Chrome, 630 Satin Stainless Steel, 613 Oil Rubbed Bronze. Cylinder: P (6-pin standard, G keyway), B (BEST SFIC, less core), L (Less Cylinder). Keying: standard, keyed alike (KA), master keyed (MK). Backset is fixed at 2-3/4": the MA Series does not offer a 2-3/8" backset option. Confirm the door prep backset before ordering.

Specifications

SKU: MA531. Function: ANSI F12/F20 Apartment/Corridor. Certification: ANSI/BHMA 156.13 Series 1000 Grade 1. Fire: UL 3-hour A label. Dead bolt: 1" throw, stainless steel with two 13/16" hardened steel saw-resistant rollers. Latch bolt: 3/4" anti-friction stainless steel. Case: Cold-formed steel, zinc dichromate plated, 0.090". Door thickness: 1-3/8" to 2-1/2". Backset: 2-3/4" only. Faceplate: 1-1/4" x 8" armored front. Hubs: Hardened steel. Electrified option: 12 or 24 VDC. Handing: Field reversible without opening case.