Corbin Russwin ML2055 Grade 1 Mortise Classroom Lockset Lever Trim Only

Corbin Russwin ML2055-M31 Mortise Classroom Lock Trim Grade 1 ML2000 Series Lever Trim

Commercial-Grade Mortise Lock Lever Trim for Classroom Security Applications

The Corbin Russwin ML2055-M31 is a professional-grade mortise lock lever trim designed for classroom security applications within the ML2000 Series platform. Engineered for high-traffic commercial, institutional, industrial, and government environments, this replacement lever trim is constructed of heavy-gauge steel and is fully compatible with the ML2000 Series mortise lockbody. The ML2000 Series has been UL cycle tested above and beyond standard requirements, completing 14.5 Million Cycles (Verification ID: V875753), making this trim an ideal choice for demanding educational and institutional settings. The field-reversible design ensures flexible installation across a wide range of door configurations.

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 Classroom Environments
• Commercial Office Buildings
• Healthcare Institutions and Hospitals
• Government and Municipal Buildings
• Industrial and Warehouse Facilities
• Hotels and Hospitality Properties
• Multi-Tenant Residential and Institutional Properties

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 robust barrier against abuse and unauthorized manipulation in high-risk environments.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock trim products deliver professional-grade reliability backed by heavy-gauge steel construction and a UL cycle test result of 14.5 Million Cycles (Verification ID: V875753). Every trim is covered by a 10 Year Limited warranty, reflecting the brand's commitment to long-term performance. Engineered for demanding commercial applications — from schools and hospitals to government facilities — Corbin Russwin provides the versatility, security, and durability that professionals require.