Corbin Russwin ML2057 LWA Storeroom or Closet Mortise Lock, LW Lever, A Rose

The Corbin Russwin ML2057 is the storeroom and closet function in the ML2000 Series mortise lock: ANSI F07, outside lever always rigid, inside lever always free, key-only outside entry, automatic deadlocking latch. It's a Grade 1 mortise lock with a heavy-gauge chrome plated steel lockcase, a two-piece anti-friction latchbolt, a one-piece stainless steel deadbolt, and a patented Quick Reversible latch that re-hands the lock in the field without disassembling the case. The LWA configuration means LW lever with A rose: the Lustra Wide lever design on Corbin Russwin's standard flat A rose.

The ML2057 LWA is the most commonly specified trim configuration in the ML2057 storeroom function. The LW (Lustra Wide) lever is Corbin Russwin's standard commercial lever profile, the A rose is the standard round flat rose, and the 626 Satin Chrome finish is the most common commercial architectural finish. When a specification calls for "Corbin Russwin ML2057," without specifying a trim code, the LWA is typically what the specifier intends. For the complete Corbin Russwin ML2000 Series and all mortise lock configurations, browse our Corbin Russwin lever locks catalog. For all commercial mortise locks across every brand, view our mortise locks catalog.

Storeroom Function, ANSI F07: The Specification Standard for Secured Rooms

Outside lever is always rigid. The only way to enter from outside is a key in the outside cylinder. The door is secured from outside at all times, between every entry, without any manual re-locking step after the door closes. Inside lever is always free. Anyone inside exits immediately without a key, without a code, and without pressing anything. The auxiliary latchbolt deadlocks the main latch automatically when the door closes, blocking shimming or carding attacks against the latch face.

The storeroom and closet function is the specification for mechanical rooms, electrical rooms, server closets, pharmaceutical storage, supply rooms, custodial closets, and any door that must always be locked from the outside corridor between key entries. It's the most restrictive standard cylindrical or mortise function for non-electrified openings: no push button, no toggle, no unlocked state for the outside lever at any point.

Corbin Russwin ML2057 LWA Technical Specifications

Series: Corbin Russwin ML2000. Function: ML2057, Storeroom or Closet, ANSI F07. Trim: LWA, LW Lever (Lustra Wide), A Rose. Grade: Grade 1. SKU: ML2057 LWA 626. Door thickness: 1-3/4" (44mm) standard. Backset: 2-3/4" (70mm). Handing: Quick reversible without disassembling lock case. Lockcase: Heavy-gauge chrome plated steel, 5-7/8" x 4" x 15/16" (149mm x 102mm x 24mm). Front: Heavy-gauge steel, 8" x 1-1/4" x 3/32" (203mm x 32mm x 2mm); flat and beveled door compatible; optional D138 wide for 1-3/8" doors. Armored front: Wrought brass, bronze, or stainless steel, machine screw attached. Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" throw (19mm). Auxiliary latchbolt: 9/16" (14mm) effective throw, 3/8" (10mm) effective deadlocking. Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" throw (25mm). Cylinder spacing: 3-5/8" (92mm) center to center, lever to cylinder. Strike: Wrought brass, bronze, or stainless steel; ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center; optional strikes and lip lengths available. Cylinder: Brass, 6-pin, L4 keyway standard; 7-pin optional; IC available. Keys: Two nickel silver standard. Keying: KD standard; Keyed Alike; Master Keyed; Construction Master Keying. Warranty: 10-year limited.

LWA vs. Other ML2057 Trim Configurations

The ML2057 lockcase is identical across all trim configurations. The three-letter trim code (LWA, LSA, LWN, LWP, etc.) indicates only the lever design and rose or escutcheon style. "LW" is the Lustra Wide lever, the broader standard commercial lever profile. "LS" is the Lustra Standard lever, a slightly narrower profile. The A-suffix indicates the standard flat A rose. The N, P, R, and M suffixes indicate different escutcheon configurations. If the building spec or existing door schedule uses LW levers on other Corbin Russwin ML2000 functions, the ML2057 LWA maintains visual consistency across all openings.