Corbin Russwin ML2059 Grade 1 Mortise Security Storeroom or Closet Lockset

Corbin Russwin ML2059-KEYED ML2000 Series Grade 1 Mortise Security Storeroom Lockset with Deadbolt

Commercial-Grade Mortise Security Storeroom and Closet Lock with Integrated Deadbolt Protection

The Corbin Russwin ML2059-KEYED is a Grade 1 mortise security storeroom and closet lockset from the ML2000 Series, engineered for high-traffic commercial, institutional, industrial, and government applications. This lockset features simultaneous latchbolt and deadbolt retraction by inside grip or by key outside, with the outside grip always rigid for maximum security. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and a patented Quick Reversible latchbolt, it is designed for 1-3/4" (44mm) standard door thickness and is field reversible for flexible installation. The ML2059 has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753), making it an exceptional choice for offices, schools, hospitals, hotels, and other demanding high-use 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 School Closets
• Healthcare Institutions and Supply Rooms
• Hotels and Hospitality Properties
• Industrial and Warehouse Facilities
• Government and Municipal Buildings
• Multi-Tenant Residential and Mixed-Use Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability with heavy-gauge steel construction and a 1" stainless steel deadbolt, UL cycle tested to an exceptional 14.5 Million Cycles (Verification ID: V875753) — far exceeding standard requirements. Backed by a 10 Year Limited warranty and Grade 1 certification, the ML2059 is engineered for the most demanding commercial, institutional, and government applications where dependable security performance is essential.