Irwin 225134 C-clamp 3 in 4.5 in Throat Cast Iron Regular Duty

Product Description

The IRWIN 225134 is a regular-duty C-clamp built for holding, clamping, and positioning work in trade and industrial applications. The cast iron body provides rigid clamping force up to 750 pounds of load capacity. A 3-inch maximum opening and a deep throat depth of 4.5 inches make this clamp well suited for reaching into workpieces where standard throat depth falls short. The 0.5-inch-diameter screw delivers controlled clamping pressure. This clamp is a standard bench and field tool for HVAC fabricators, pipefitters, electricians, and general trade contractors who need reliable holding force during assembly or installation tasks.

This clamp is used in residential and commercial trade applications where a secure temporary hold is needed during welding, fastening, gluing, or fitting work. The deep throat design extends reach beyond the edge of the material, which is especially useful when clamping ductwork flanges, pipe hangers, strut, or structural steel during assembly. The regular-duty rating makes it appropriate for light to moderate clamping tasks rather than heavy-press or production-line use.

Key Features

• 3-inch maximum opening capacity handles a wide range of material thicknesses
• 4.5-inch deep throat depth provides extended reach into the workpiece
• 750-pound load capacity delivers firm, stable clamping force
• Cast iron body resists deformation under sustained clamping load
• 0.5-inch screw diameter for controlled pressure application
• Regular-duty rating suitable for general trade and fabrication tasks

Compatibility

Designed as a standard regular-duty C-clamp for general trade, fabrication, and installation use where a 3-inch opening and 4.5-inch deep throat are required.

Installation Notes

C-clamps are installed and removed by hand or with a wrench on the screw handle — no power tools are required. Always verify the clamping surfaces are clean and properly aligned before applying load. Do not exceed the rated 750-pound load capacity. When used near electrical work, confirm power is isolated before applying the clamp to any energized or adjacent components.