Corbin Russwin ML2073 Grade 1 Mortise Classroom Security Lockset

Corbin Russwin ML2073 Mortise Classroom Security Lockset | Grade 1, Field Reversible, 1-3/4" Door

Commercial-Grade Classroom Security Mortise Lock with Deadbolt Control and Patented Quick Reversible Latchbolt

The Corbin Russwin ML2073 is a Grade 1 mortise classroom security lockset from the ML2000 Series, engineered for high-traffic commercial, institutional, industrial, and government applications. Designed for 1-3/4" (44mm) standard door thickness, this lockset features a 3/4" latchbolt and a 1" stainless steel deadbolt, providing life safety and security in a single door prep. The field-reversible handing and patented Quick Reversible latchbolt allow reversal of hands without disassembling the lock case, making installation and reconfiguration straightforward. The ML2073 has been UL cycle tested above and beyond requirements, completing 14.5 million cycles (Verification ID: V875753), confirming its suitability for the most demanding environments including 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

• K-12 Schools and Educational Facilities
• College and University Campus Buildings
• Healthcare Institutions and Hospitals
• Commercial Office Buildings
• Government and Municipal Buildings
• Hotels and Hospitality Properties
• Industrial and Institutional Facilities

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a vandal-resistant barrier suited for high-abuse environments. When paired with Corbin Russwin's patented high-security Pyramid or Access 3® cylinders, the ML2073 becomes a formidable barrier against unauthorized entry and tampering.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks are constructed of heavy-gauge steel and have been UL cycle tested to an exceptional 14.5 million cycles (Verification ID: V875753), far exceeding standard requirements for Grade 1 commercial hardware. The ML2073 is backed by a 10 Year Limited warranty and delivers life safety and security in a single door prep, eliminating the need for a separate deadlock. Engineered for demanding commercial, institutional, and government applications where dependable classroom security performance is essential.