Corbin Russwin ML2057 Grade 1 Mortise Storeroom Lockset Lever Trim Only

Corbin Russwin ML2057-M31 Mortise Storeroom Lock Trim — Grade 1 ML2000 Series Lever Trim

Commercial-Grade Replacement Lever Trim for ML2000 Series Mortise Storeroom Locksets

The Corbin Russwin ML2057-M31 is a Grade 1 mortise storeroom lock trim designed as a replacement lever trim component for the ML2000 Series mortise lockset platform. Engineered for demanding commercial, institutional, industrial, and government applications, this lever trim is constructed to integrate seamlessly with the ML2000 Series heavy-gauge steel lockbody. The ML2000 Series lock platform features a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, and this trim is field reversible to accommodate various door hand directions without disassembling the lock case. With a 10-year limited warranty and UL cycle testing completed at 14.5 million cycles (Verification ID: V875753), this trim delivers the reliability and longevity required in high-traffic environments.

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

• Commercial Office Buildings and Storerooms
• Educational Facilities and Campus Buildings
• Healthcare Institutions and Medical Facilities
• Hotels and Hospitality Properties
• Industrial and Warehouse Facilities
• Government and Municipal Buildings
• Multi-Tenant Residential and Mixed-Use Properties

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, the system provides a formidable barrier against unauthorized entry and physical abuse.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock trim products deliver professional-grade reliability backed by Grade 1 construction and UL cycle testing verified at 14.5 million cycles (Verification ID: V875753). The 10 Year Limited warranty reflects the brand's commitment to long-term performance in commercial, institutional, and government environments. Engineered for demanding high-traffic applications where dependable security and durability are essential, Corbin Russwin ML2000 Series components are a trusted choice for offices, schools, hospitals, hotels, and beyond.