Value Collection HCI31120550NG-005BX Hex Head Bolt A325

Product Description

The VALUE COLLECTION HCI31120550NG-005BX is a heavy-duty hex head bolt designed for structural and industrial fastening applications. It features a 1-1/8-7 UNC thread size with a 5-1/2 inch length under head and is partially threaded, allowing the unthreaded shank to carry shear loads. Manufactured from steel to ASTM A325 specifications and finished with a hot-dipped galvanized coating, this bolt delivers both the tensile strength required for structural connections and corrosion resistance for demanding environments. Licensed tradespeople and contractors rely on this grade for high-strength structural steel connections.

This bolt is used in structural steel construction, heavy equipment assembly, and industrial fabrication where ASTM A325 compliance is specified. The hot-dipped galvanized finish makes it suitable for exterior and high-moisture environments. The partially threaded shank is appropriate for bolted connections where the bolt passes through multiple plies of steel and the threads engage only the nut side, which is standard practice in structural steel framing and beam connections.

Key Features

• ASTM A325 grade steel construction for high-strength structural fastening
• 1-1/8-7 UNC thread size with 5-1/2 inch length under head
• Partially threaded shank to carry shear loads in bolted connections
• Hot-dipped galvanized finish for corrosion resistance in exterior and wet environments
• Inch measurement system; compatible with standard UNC hex nuts and washers

Compatibility

Designed as an ASTM A325-compliant structural hex head bolt for use with standard 1-1/8-7 UNC heavy hex nuts and hardened washers in structural steel connections.

Installation Notes

Installation of ASTM A325 structural bolts should be performed by qualified ironworkers or structural tradespeople following AISC and RCSC specifications for structural bolting. Bolts must be tightened to the specified pretension using the turn-of-nut, calibrated wrench, direct tension indicator, or twist-off method as required by the project engineer. Always use hardened washers under the turned element. Inspect threads and galvanized coating for damage before installation.