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The WILTON 20304 is a 400 Series C-clamp built for heavy-duty clamping tasks in fabrication, welding, and general metalworking applications. It provides a jaw opening range of 0 to 6 inches and a throat depth of 3-5/8 inches, giving technicians and tradespeople the reach and grip needed for a wide variety of workpiece thicknesses. The C-frame design delivers rigid, reliable clamping force with a standard screw mechanism. This clamp is sold individually and is a go-to tool for welders, pipefitters, ironworkers, and mechanical contractors who need dependable holding power on the job.
The 20304 fits into the 400 Series lineup from WILTON, designed for professional use in shops, fabrication facilities, and field work. It handles clamping tasks on flat stock, pipe assemblies, structural members, and framing setups where a stable, adjustable hold is required. The 6-inch jaw capacity makes it versatile across a range of workpiece sizes, while the 3-5/8-inch throat depth allows it to reach over material edges and flanges that shallower clamps cannot accommodate.
Designed as an OEM-style replacement or direct addition to 400 Series C-clamp setups used in professional fabrication and welding environments.
C-clamps of this type are typically used by welders, pipefitters, and mechanical contractors without the need for power tools. Position the clamp over the workpiece and tighten the screw by hand or with a tommy bar until the desired clamping force is achieved. Avoid over-tightening, which can distort thin or soft workpieces. Always ensure the clamp is fully seated and stable before applying load or beginning any cutting, welding, or fastening operation.
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