Corbin Russwin ML20907 Grade 1 Fail Safe Electrified Mortise Lock, Outside Grip Locked when Energized, No Cylinder Override, Lever x Lever Body Only

Corbin Russwin ML20907-LL-SAF ML2000 Series Fail Safe Electrified Mortise Lock Body, Outside Grip Locked When Energized, Lever x Lever, Field Reversible

Grade 1 Electrified Mortise Lock Body for High-Traffic Commercial Applications

The Corbin Russwin ML20907-LL-SAF is a Grade 1 electrified fail safe mortise lock body from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. This lever x lever body-only configuration locks the outside grip when energized while keeping the inside grip always free, with an auxiliary latch that deadlocks the latchbolt for added security. Constructed of heavy-gauge steel with a 3/4" latchbolt and a 1" stainless steel deadbolt, it accommodates standard 1-3/4" (44mm) door thickness and features a field-reversible design for flexible installation. The unit draws 500mA peak and 15mA holding current, and is supplied with an ANSI straight lip strike measuring 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center.

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
• Hotels and Multi-Tenant Residential Properties
• Industrial and Warehouse Facilities
• Government and Municipal Buildings
• Access-Controlled Institutional Environments

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against vandalism and forced-entry attempts. When paired with Corbin Russwin Pyramid or Access 3® high-security cylinders, the ML20907 delivers a comprehensive intrusion-deterrent solution for high-risk openings.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock bodies are built from heavy-gauge steel and have been UL cycle tested to over 14.5 million cycles (Verification ID: V875753), far exceeding standard Grade 1 requirements for the most demanding high-traffic applications. The ML20907-LL-SAF is backed by a 10 Year Limited warranty and features a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, delivering life safety and security in a single door preparation. Engineered for commercial, institutional, and government environments where dependable, code-compliant performance is essential.