Value Collection TCB31000425 Tension Control Bolt A325

Product Description

The VALUE COLLECTION TCB31000425 is a Grade A325 structural tension control bolt designed for high-strength steel-to-steel connections in construction and fabrication applications. The bolt features a 1-8 UNC thread and measures 4-1/4 inches under the head with a 1-7/8 inch head diameter. Each package includes a matching nut and washer, providing a complete fastener assembly ready for installation. The uncoated bright finish is standard for structural steel work where the bolt will be embedded in a connection or painted over after installation. Structural ironworkers and steel fabricators install these as part of pre-engineered connection assemblies.

This tension control bolt meets ASTM A325 and ASTM F1852 standards, making it suitable for structural steel connections in commercial and industrial building construction, steel bridges, and heavy fabrication. The splined-end design allows installation with a TC gun, which shears the spline tip at the specified clamp load, providing a reliable visual indication that the bolt has been properly tensioned. Packages contain 5 complete bolt assemblies per unit.

Key Features

• Grade A325 steel construction meets ASTM A325 and ASTM F1852 structural fastener standards
• 1-8 UNC thread size with 4-1/4 inch length under head for standard structural connection depths
• Splined end shears at proper clamp load for built-in installation verification
• Includes matching nut and washer for a complete connection assembly
• Uncoated bright finish suitable for standard structural steel applications
• Sold in packages of 5 complete assemblies

Compatibility

Designed as an OEM-style replacement and standard supply item for structural steel connections requiring ASTM A325 or ASTM F1852 compliant high-strength tension control bolt assemblies in 1-8 UNC thread configurations.

Installation Notes

Installation should be performed by qualified structural ironworkers or steel erectors following AISC and RCSC specifications for structural bolting. A TC gun (tension control installation tool) is required to engage and shear the splined tip at the proper pretension load. Inspect the connection joint and mating surfaces before installing, and confirm nut and washer are positioned correctly per the connection design. Never reuse tension control bolts once the spline has been sheared.