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Tools and Training for Security Professionals™



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3-Wheel Lock, Spy Proof Dial & Ring, Black & White, Key Locking

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Do you need more than we currently have in stock? Contact sales at sales@mbausa.com or 1-888-622-5495 for availability.


Product Description

This Sargent & Greenleaf mechanical combination lock package includes a model 6730 lock body, a D225 dial, and a R167 dial ring.

The black and white dial is top reading (Spy Proof) with a spindle length to accommodate doors up to 3-1/2” thick.  The D225 dial also features a lock cylinder to allow locking the dial at the zero position adding tamper resistance to your security.

The Model 6730 is the venerable standard of the industry for mechanical safe locks. This UL 768 Group 2 listed lock features a brass lever and three brass and aluminum combination wheels.

Includes spline key, change key and mounting hardware.

  • Patented S&G torque adjuster enhances security by maintaining proper wheel pack tension.
  • Integral relocker thwarts forced entry attacks.
  • Brass four-way drive cam allows mounting all four common mounting patterns (RH, LH, VU, or VD).
  • Metal wheels (brass and aluminum) for long, dependable life
  • Brass lever
  • Comes with change key
  • Can be used with a variety of S&G dials and dial rings.
  • Uses the industry standard footprint to match the mounting dimensions of most modern mechanical and electronic safe locks.


To download Installation Instructions for the SG6730-112, click here.

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Product Reviews

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  1. As Promised

    Posted by Unknown on 20th May 2019

    Lock was delivered on time and as promised. Good value and prompt service

  2. Easy install by an amateur

    Posted by Gabe on 27th Aug 2018

    I was nervous about replacing my defective digital lock, but the instructions that came with this were straightforward. Had a small challenge figuring out how to change the default code, but ultimately finished the job in less than an hour.

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