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S&G 2937 Group 1 High Security Mechanical Safe Lock Kit, Spy Proof, FF-L-2937

Built to provide high-level security for government and defense industry applications, Sargent and Greenleaf’s proven, high security Model 2937 protects field safes, armory vault doors, and other GSA-approved containers.

The 2937 high-security combination lock is easy to install or retrofit onto existing containers. The lock matches the footprint and mounting dimensions of most mechanical and electronic safe locks.

Built to federal specification FF-L-2937. It is approved for weapons containers and field safes. Three all-metal wheel construction, built in thermal protection provided by integral thermal relock component, UL Group 1, stainless steel drilled/tapped bolt.

Kit includes the 2937 spy-proof combination dial, ring, lock body and lockbolt. 


$804.46 $617.54
Availability: stock

Protecting the world’s most sensitive information and securing high-security spaces with life-safety devices requires more than a GSA-approved lock. Sargent and Greenleaf government solutions meet stringent federal specifications, but also deliver proven quality, durability, and performance.

  • UL listed group 1
  • 3 wheels
  • 5/16" spindle diameter
  • Spy-proof
  • Black and white dial and ring
  • Includes black and white dial and ring and dead bolt
  • Dial spindle incorporates carbide barrier pins and a shear line to control the point of separation in a forced entry attempt
  • Integral thermal relock component protects against thermal attacks
  • Two-way drive cam and two-way dial spindle combine to allow mounting right-hand, left-hand, vertical-up or vertical-down
  • Meets federal specification FF-L-2937


  • Familiar left-right-left dialing, turn to zero, press in and release, then turn dial to open
  • Over 1,000,000 potential unique combinations
  • Key-changeable wheel design


  • Standard S&G Magic Module footprint
  • Universally handed:left hand, right hand, vertical up, or vertical down mounting

Advanced Attack Resistance

Underwriters Laboratories tested Model 2937 Locks to resist over 20 hours of expert manipulation. Integrated features protect the lock against forced entry, punch attack, thermal attack, and brute force attack. Our SpyProof™ Dial ensures that only the lock operator sees the numbers on the dial.

Simple Operation

Use familiar left-right-left dialing, turn to zero, press in and release, then turn the dial to open.

Quick Combination Changes

Three all-metal wheels allow for over 1,000,000 potential unique combinations, easily managed with Sargent and Greenleafs ’ user-friendly key changeable wheel design.

Proven Design. Advanced Features

Combining patented, time-tested design with enhanced security features, Sargent and Greenleaf’s Model 2937 Mechanical Safe Locks meet U.S. Federal Specification FF-L-2937.

Download S&G 2937 Lock Kit Brochure

Download S&G 2937 Lock Instructions

Attention CA Residents: Prop65 Warning

Prop 65 Warning


WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.


More Information
Manufacturer S & G
Model 2937-200
Color Black
Lock Type Combination Lock
Spy-Proof No
Key Locking No
Override Key No
Weight 3.0000
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