Corbin Russwin ML2051 Grade 1 Mortise Office Lockset Lever Trim Only

Corbin Russwin ML2051-M31 Mortise Office Lock Trim Grade 1 Field-Reversible Lever Trim for ML2000 Series

Commercial-Grade Mortise Lock Lever Trim for High-Traffic Applications

The Corbin Russwin ML2051-M31 is a professional-grade mortise lock lever trim designed as a replacement part and accessory for the ML2000 Series mortise lockset platform. Engineered for demanding commercial, institutional, industrial, and government environments, this lever trim is compatible with the ML2000 Series Grade 1 mortise lockbody — a heavy-gauge steel lock system tested to over 14.5 million cycles (UL Cycle Verification ID: V875753). The ML2051-M31 features field-reversible handing, allowing installers to adapt the trim to virtually any door configuration without disassembling the lock case, thanks to Corbin Russwin's patented Quick Reversible latchbolt design. Backed by a 10-year limited warranty, this trim delivers the reliability and versatility required 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

• Commercial Office Buildings
• Educational Facilities and Schools
• Healthcare Institutions and Hospitals
• Hotel and Hospitality Properties
• Industrial and Government Facilities
• Multi-Tenant Residential and Mixed-Use Properties
• Institutional and High-Traffic Public Buildings

Tamper-Resistant Design

The ML2000 Series supports vandal-resistant trim configurations featuring stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against abuse and unauthorized manipulation in high-risk environments.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock products deliver professional-grade reliability with heavy-gauge steel construction rated for over 14.5 million cycles per UL cycle testing (Verification ID: V875753). The ML2051-M31 lever trim is backed by a 10-year limited warranty and features field-reversible handing and thru-bolted construction for lasting security and ease of installation. Engineered for demanding commercial applications where dependable performance and long-term durability are essential.