Corbin Russwin ML2055 Grade 1 Mortise Classroom with LW-Lustra Lever, A Rose, 626 Satin Chrome

Corbin Russwin ML2055-LWA-626 Mortise Classroom Lock with LW Lustra Lever, A Rose, Satin Chrome Finish

Grade 1 Commercial Mortise Lock for High-Traffic Institutional Applications

The Corbin Russwin ML2055-LWA-626 is a Grade 1 mortise classroom lock from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Featuring ANSI function F01, this lock allows latchbolt retraction by grip from either side with both grips always free, making it ideally suited for classroom security applications. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and Corbin Russwin's patented Quick Reversible latchbolt, the ML2055 is finished in 626 Satin Chrome with the LW Lustra lever on an A Rose, delivering both durability and refined aesthetics for offices, schools, hospitals, hotels, and other high-use facilities.

Professional Features & Benefits

• ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
• UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
• Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
• Multi-function capability: 12 functions configurable from one ML2054 lockbody
• Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
• 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
• Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
• Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
• Motorized Electric Latch Retraction (MELR) available for ML20900 series
• Thru-bolted trim designs for proper alignment and increased security
• Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
• UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
• Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

• Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
• Handing: Handed; quick reversible — re-handed without disassembling the lock case
• Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
• Backset: 2-3/4" (70mm)
• Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
• Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
• Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
• Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
• Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
• Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
• Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
• Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
• Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
• Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

• Educational Facilities and Classrooms
• Commercial Office Buildings
• Healthcare Institutions and Hospitals
• Hotels and Hospitality Properties
• Government and Municipal Buildings
• Industrial and Institutional Facilities
• Multi-Tenant Residential and Mixed-Use Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability backed by heavy-gauge steel construction and a 1" stainless steel deadbolt, with UL Cycle testing verified at 14.5 Million Cycles (Verification ID: V875753) — performance that goes well above and beyond standard requirements. The ML2055 is covered by a 10-year warranty, providing long-term confidence for facility managers and security professionals. Engineered for the most demanding commercial, institutional, and government applications, Corbin Russwin mortise locks combine proven durability, versatile trim options, and field-reversible convenience in a single, trusted solution.