Sargent & Greenleaf Safe Dial, Key Locking, Spy-Proof, CHR 41S

The dial handles a safe door up to 3.406 inches thick. That is the spindle-length limit, so measure the door at the lock mounting point before ordering. Anything thicker than 3.406 inches and this dial won't reach the lock body.

Yes. The S&G key-locking spy-proof dial is made for Group 2 and Group 2M safe locks. If your container is running a Group 1 lock, this is not the dial for it.

It is splined on the 41 spline pattern. That is the mating detail between the dial and the spindle, and it has to match what your lock and spindle use. A dial with a different spline will not seat, so confirm your existing spindle is a 41 spline before swapping.

The dial is a separate serviceable part from the lock body, so a damaged, worn, or wrong-style dial gets replaced on its own. This S&G unit is a dial only, not a lock. Three things have to line up for the swap: a Group 2 or 2M lock, a 41 spline, and a door no thicker than 3.406 inches.

A spy-proof dial hides the dial ring numbers from anyone standing off to the side, so only the person directly in front of the dial can read the combination being entered. It matters on safes in an open area, a teller line, a pharmacy, or anywhere staff and the public can see the operator's hands. On a safe in a locked back room it buys you little. This S&G D Series dial is the spy-proof, key-locking version.

Key locking lets you immobilize the dial with a key once the safe is closed, so the combination cannot be dialed at all until the dial is unlocked again. Two-stage control: the keyholder decides when the combination user can even attempt an opening. Common where a manager holds the key and staff hold the combination.