S&G 8430

Sargent and Greenleaf 8430 1R

The 8430 is a UL Group 1R combination lock made by Sargent and Greenleaf. It is mainly used on safes and vaults and GSA Containers.

Principles of operation
The 8430 uses a mechanism to prevent the fence from touching the wheel pack during dialing. Unless all wheels are alligned correctly, and the dial unlocks the cam wheel, the fence will not drop.

Vulnerabilities
The 8430 may be vulnerable to the following attacks:


 * Manipulation
 * Dialing observation