Value Collection HCI31250375NG-005BX Hex Head Bolt A325

Product Description

The VALUE COLLECTION HCI31250375NG-005BX is a fully threaded hex head bolt designed for structural and heavy-duty fastening applications. It carries a 1-1/4-7 UNC thread size with a 3-3/4 inch length under the head, manufactured from steel to ASTM A325 structural bolt standards. The hot-dipped galvanized finish provides corrosion resistance for exterior, wet, or high-humidity environments. This bolt is used by ironworkers, structural contractors, millwrights, and mechanical contractors where high-strength, code-compliant fasteners are required.

This bolt is suited for structural steel connections, heavy equipment mounting, bridge and building framework, and industrial machinery assembly. The ASTM A325 grade designation makes it appropriate where engineering specifications call out high-strength structural bolts. Full threading along the shank allows engagement across a range of grip lengths and is compatible with heavy hex nuts and structural washers used in steel-to-steel connections.

Key Features

• ASTM A325 grade steel construction meets structural fastener strength requirements
• Fully threaded shank provides maximum thread engagement flexibility
• Hot-dipped galvanized finish for corrosion resistance in outdoor and wet conditions
• 1-1/4-7 UNC thread form for compatibility with standard heavy hex nuts
• 3-3/4 inch length under head suits a range of structural grip lengths
• Inch measurement system for standard US structural applications

Compatibility

Designed as a high-strength structural replacement or new-installation hex bolt for applications specifying ASTM A325 fasteners with a 1-1/4-7 UNC thread and 3-3/4 inch length under head.

Installation Notes

Installation should be performed by qualified ironworkers, structural mechanics, or contractors following applicable structural codes including AISC and RCSC specifications for high-strength bolted connections. Always shut down and de-energize any powered equipment before fastening or retorquing in mechanical installations. Use calibrated torque equipment appropriate for A325 structural bolts and do not substitute standard hex nuts where heavy hex nuts are specified. Inspect galvanized coating for damage before installation in corrosive environments.