Mo-Clamp Frame Straightening Chain

Mo-Clamp Frame Straightening Chain: Built for the Demands of Collision Repair

When a vehicle frame takes impact damage, the chain connecting your pulling equipment to the work is every bit as critical as the clamp itself. Mo-Clamp — the originator of the self-tightening clamp and a decades-long standard in professional body shops — brings that same commitment to precision and strength to its frame straightening chain lineup. These aren't generic tow chains repurposed for collision work; they are purpose-engineered pulling chains designed to operate reliably under the extreme, sustained loads that frame straightening demands.

NACM-Spec, Grade 70 Carbon Steel Construction

Mo-Clamp's frame straightening chain is manufactured to meet strict industry standards. The chain conforms to NACM (National Association of Chain Manufacturers) specifications and is produced from Grade 70 carbon steel — the same class of steel used in load-binding applications where failure is simply not an option. The 3/8" chain, Mo-Clamp's flagship frame straightening size, carries a working load limit of 6,600 lbs. and has been proof-tested to 20,000 lbs., giving technicians a significant safety margin during the most demanding pulls.

Multiple Sizes and Configurations

Mo-Clamp offers its frame straightening chain in three diameters — 1/4", 5/16", and 3/8" — so shops can match the chain to the pull requirements of any job. The 1/4" chain (model series #6104–#6112) carries a working load limit of 3,100 lbs. and is well-suited for lighter pulls, while the 3/8" series (model series #6004–#6012) handles the heaviest structural correction work. Each chain configuration is available in multiple pre-cut lengths — from 4 feet up to 12 feet — and typically includes a Grab Hook for immediate use. Shops needing a custom solution can order chain cut to specification, or purchase a 400' barrel of 3/8" Mo-Clamp chain for high-volume operations.

Designed to Integrate with the Full Mo-Clamp System

What sets Mo-Clamp chain apart from off-the-shelf alternatives is how seamlessly it integrates with the wider Mo-Clamp ecosystem of clamps, hooks, and accessories. The 3/8" chain is the standard interface for core Mo-Clamp components like the Chain Snugger (#6600), which tightens chain when used with the Chain Locking Fork on frame racks, and the Chain Spreader Bar (#1150), which allows technicians to make pulls around box rails and other obstacles while keeping pulling clamps properly spaced. The 1/2" Screw Pin Chain Shackle (#4044) provides a solid hookup point when used with chain loops, and the 3/8" Grab/Slip Combo (#4146) offers fast hook-up to any section of 3/8" chain with a 7-ton capacity — all heat-treated steel throughout.

Why Professional Shops Choose Mo-Clamp Chain

Car manufacturers are constantly evolving frame geometry and construction methods, which means a shop's chain-and-clamp setup needs to be versatile and reliable across dozens of platforms. Mo-Clamp's chain lineup is sized, rated, and tested to keep pace with those demands. Whether you're running a busy production shop or a specialty collision center, Mo-Clamp chain gives you a foundation you can trust pull after pull.