Value Collection TCB30870425USA Tension Control Bolt A325

Product Description

The VALUE COLLECTION TCB30870425USA is a structural tension control bolt designed for high-strength steel-to-steel connections in construction and heavy fabrication applications. This bolt features a 7/8-9 UNC thread form and measures 4-1/4 inches under the head, with a 1-5/8 inch head diameter. Manufactured from A325 steel in a bright, uncoated finish, it meets ASTM A325 and ASTM F1852 fastener standards. Each package includes a matching nut and washer, making it a complete assembly-ready fastener set. Structural ironworkers and steel erectors rely on tension control bolts for consistent, torque-verified clamping force in bolted structural connections.

Tension control bolts are used in structural steel erection for commercial and industrial construction, including beam-to-column connections, moment frames, and base plate assemblies. The TC bolt design uses a splined end that shears off at a predetermined torque, providing a reliable visual indicator that proper pretension has been achieved without requiring manual torque verification. This fastener is suited for use where AISC or RCSC bolt specifications are required by the project engineer of record.

Key Features

• 7/8-9 UNC thread size for standard structural bolt hole patterns
• 4-1/4 inches length under head accommodates typical multi-ply connection stack-ups
• A325 material grade meets ASTM A325 and ASTM F1852 standards
• Bright uncoated finish for bare steel connections or field-painted assemblies
• Includes nut and washer for complete installation as a single kit
• Splined TC design provides visual confirmation of proper pretension

Compatibility

Designed as an OEM-style structural fastener for use in bolted steel connections requiring 7/8-9 UNC tension control bolt assemblies per ASTM A325 or ASTM F1852 specifications.

Installation Notes

Installation of tension control bolts is typically performed by certified structural ironworkers using a TC bolt installation tool that engages the splined shear end. Always verify that the connected plies are fully drawn up snug before final tightening. Follow RCSC Specification for Structural Joints Using High-Strength Bolts for pretensioning procedures and inspection requirements. De-energize or isolate any adjacent electrical or mechanical systems before working in close proximity to energized structural environments.