Value Collection TCB30870375USA Tension Control Bolt 7/8-9

Product Description

The VALUE COLLECTION TCB30870375USA is a structural tension control bolt designed for high-strength steel-to-steel connections in heavy construction and structural steel erection applications. This bolt features a 7/8-9 UNC thread, a length under head of 3-3/4 inches, and a head diameter of 1-5/8 inches. Manufactured from A325 grade steel with a bright, uncoated finish, it meets ASTM A325 and ASTM F1852 standards. Each package includes the bolt, a compatible nut, and a washer. Installation is performed by ironworkers and structural steel crews using a spline-type installation tool that shears the pintail when the specified tension is reached.

Tension control bolts of this type are used in structural steel framing for commercial buildings, bridges, industrial facilities, and other projects where pre-engineered bolt tension is required. The self-indicating shear design eliminates the need for torque wrenches or manual tension verification, making them a common choice on job sites governed by AISC and RCSC bolt installation specifications. This bolt is suited for standard structural connections where ASTM A325 high-strength fastener performance is specified on the engineer-of-record drawings.

Key Features

• A325 grade steel construction meets ASTM A325 and ASTM F1852 structural fastener standards
• 7/8-9 UNC thread with 3-3/4 inches length under head for standard structural member stacking
• Spline-drive pintail design delivers consistent, self-indicating bolt preload at installation
• Bright, uncoated finish suitable for painted or primed structural steel assemblies
• Each package includes bolt, nut, and washer as a complete assembly kit
• Packaged in quantities of 5 for small-lot or repair-quantity procurement

Compatibility

Designed as an OEM-style structural fastener for use in ASTM A325-specified steel connections requiring 7/8-9 UNC high-strength tension control bolts.

Installation Notes

Installation requires a calibrated electric tension control wrench with the appropriate 7/8-inch spline socket set. Always follow RCSC Specification for Structural Joints requirements for hole preparation, bolt assembly sequence, and pre-installation verification. Ensure all faying surfaces are free of oil, loose scale, and debris before assembly. Sheared pintails confirm minimum pretension has been achieved and must not be reused as tension indicators on second-pass tightening.