Gibraltar CCM00400-2 C-clamp 12 in Forged Steel Regular-duty

Product Description

The GIBRALTAR CCM00400-2 is a regular-duty C-clamp built for demanding clamping tasks in fabrication, welding, and general metalworking applications. The body is forged steel for rigidity under load, and the spindle, screw, and anvil are copper plated to resist galling and provide smooth thread action. This clamp opens to a maximum of 12 inches and delivers a rated load capacity of 9,500 pounds. The deep throat design, measuring 6-5/16 inches, allows clamping further back from a workpiece edge than a standard throat clamp. Machinists, ironworkers, welders, and millwrights are the typical users for a clamp in this size and duty class.

This clamp is suited for heavy fabrication shops, structural steel work, and mechanical assembly where a wide jaw opening and deep throat reach are required. The 12-inch maximum opening handles thick stock and large assemblies, while the 3-inch minimum opening keeps it functional on smaller workpieces. The copper-plated contact surfaces help prevent marring of finished or softer metal surfaces and reduce the chance of thread seizing under repeated use. At 16 pounds, this is a bench or floor clamp intended for stationary or semi-stationary clamping setups rather than overhead or suspended use.

Key Features

• Forged steel body provides strength and rigidity under loads up to 9,500 pounds
• Deep throat depth of 6-5/16 inches allows clamping well back from the workpiece edge
• Maximum opening capacity of 12 inches accommodates thick stock and large assemblies
• Copper-plated spindle, screw, and anvil resist galling and ease thread operation
• Minimum opening of 3 inches maintains usability across a range of workpiece sizes
• 7/8-inch screw diameter provides substantial thread engagement for high clamping force

Compatibility

Designed as a standard C-clamp replacement or addition for fabrication, welding, and general industrial clamping setups requiring a 12-inch jaw opening with deep throat reach.

Installation Notes

C-clamps of this size and load rating should be set and tightened by hand using the swivel handle only — do not use a pipe extension or impact tool on the screw. Inspect the screw threads and swivel pad before each use and discard if threads are stripped or the pad is cracked. When used near welding operations, verify that current is not passing through the clamp body, as stray arc current can damage threads and reduce clamp integrity. Always position the clamp so the load bears along the screw centerline to prevent side-loading the throat.