Value Collection HCI31120450N-005BX Hex Head Bolt A325

Product Description

The VALUE COLLECTION HCI31120450N-005BX is a Grade A325 hex head bolt designed for structural and heavy-duty mechanical fastening applications. It features a 1-1/8-7 UNC thread size with a 4-1/2 inch length under head and a partially threaded shank. Constructed from uncoated steel meeting ASTM A325 standards, this bolt delivers the high-strength performance required in structural steel connections, heavy equipment assembly, and industrial framing work. Its bright, uncoated finish is suitable for applications where a secondary coating will be applied or where bare steel is acceptable for the environment.

This bolt is used in structural steel construction, bridge fabrication, heavy machinery assembly, and industrial fabrication where ASTM A325 high-strength fasteners are specified by engineers or building codes. The partially threaded shank provides a bearing surface in the grip zone, which is critical for shear-loaded joint applications common in steel-to-steel connections. It is typically installed by ironworkers, millwrights, and mechanical contractors working to structural specifications.

Key Features

• ASTM A325 high-strength structural bolt standard
• 1-1/8-7 UNC thread for compatibility with standard heavy-duty nuts and hardware
• Partially threaded shank provides a clean bearing surface in the grip zone
• 4-1/2 inch length under head accommodates thick material stack-ups
• Bright uncoated finish suitable for field-coating or bare steel applications
• Inch measurement system for use with standard imperial hardware

Compatibility

Designed as an ASTM A325-compliant structural hex head bolt for use with standard 1-1/8 inch heavy hex nuts and hardened washers in structural steel connections per applicable engineering specifications.

Installation Notes

Installation should be performed by qualified ironworkers or structural mechanics following AISC and RCSC specifications for high-strength bolted connections. Always use the appropriate heavy hex nut and hardened washer as required by the joint design. De-energize and lock out any associated equipment before working in the installation area. Do not use impact tools without verifying compatibility with the specified tightening method, whether snug-tight, pretensioned, or slip-critical.