Value Collection HCI31000400N-005BX Hex Head Bolt A325

Product Description

The VALUE COLLECTION HCI31000400N-005BX is a heavy hex head bolt designed for structural and industrial fastening applications. This fastener measures 4 inches in length under the head and carries an ASTM A325 structural steel designation, making it suitable for high-strength bolted connections. The shank is partially threaded with a 1-8 UNC thread form — coarse-thread series in the inch system — and the finish is bright uncoated steel. Structural ironworkers, millwrights, and general contractors specify A325-grade hardware where load-bearing joint integrity is a primary requirement.

This bolt is used in steel-to-steel structural connections including beam-to-column joints, base plate assemblies, and heavy equipment mounting applications. The coarse 1-8 UNC thread pitch is well-suited for assembly in field conditions where speed of installation and resistance to cross-threading matter. Partial threading leaves a smooth shank section in the grip length of the joint, which is standard practice for shear-loaded structural bolted connections. Sold individually.

Key Features

• ASTM A325 structural steel grade for high-strength bolted connections
• 1-8 UNC coarse thread series in the inch measurement system
• 4-inch length under head with partial threading for proper grip-length shank
• Bright uncoated finish — no coating buildup to affect thread fit or torque values
• Hex head drive accepts standard structural wrenching tools and impact sockets

Compatibility

Designed as a standard ASTM A325 structural hex bolt for use with compatible heavy hex nuts and hardened washers per ASTM F436 in steel structural assemblies requiring 1-8 UNC coarse-thread fasteners.

Installation Notes

Installation of ASTM A325 structural bolts should be performed by qualified ironworkers or structural mechanics in accordance with AISC and RCSC bolt installation specifications. Always power down or de-energize adjacent systems before working in proximity to energized equipment. Use calibrated torque wrenches or tension-control tooling as required by the applicable structural specification — do not substitute general-purpose impact tools without verifying that the required bolt pretension is achieved. Inspect threads and mating nut prior to installation to confirm clean engagement.