Value Collection TCB31000400 Tension Control Bolt A325

Product Description

The VALUE COLLECTION TCB31000400 is a structural tension control bolt designed for high-strength bolted connections in steel construction. With a 1-8 UNC thread size and a 4-inch length under the head, this fastener meets ASTM A325 and ASTM F1852 standards, making it suitable for structural steel joints where precise clamping force is required. The bolt ships with a compatible nut and washer, giving installers everything needed for a complete connection. The bright, uncoated finish is appropriate for protected or interior structural applications. Each package contains 5 complete sets.

This tension control bolt is used in structural steel erection, steel-frame construction, and heavy mechanical or industrial assembly where ASTM A325-grade fasteners are specified. The splined end design allows installation with a TC wrench, which shears the spline when proper tension is reached, providing a visual and mechanical confirmation of correct preload. Iron workers, structural steel crews, and millwrights are the typical installers for this fastener type.

Key Features

• 1-8 UNC thread for standard structural bolt compatibility
• 4 inches length under head for common structural steel connection thicknesses
• Meets ASTM A325 and ASTM F1852 structural bolt standards
• Includes nut and washer for a complete fastener assembly
• Bright, uncoated finish suitable for interior structural applications
• Spline-end tension control design confirms proper preload upon installation

Compatibility

Designed as an OEM-style structural replacement or new-installation fastener for applications requiring ASTM A325-grade, 1-8 UNC tension control bolts in steel-to-steel connections.

Installation Notes

Tension control bolts must be installed by qualified iron workers or structural steel erectors following applicable code requirements, including AISC and RCSC bolt installation specifications. Power down or de-energize any adjacent systems before working in proximity to electrical infrastructure during steel erection. Use a calibrated TC wrench to drive the bolt until the splined tip shears, confirming that the required preload tension has been achieved. Do not reuse tension control bolts once the spline has been sheared.