Value Collection HCI31120375N-005BX Hex Head Bolt A325

Product Description

The VALUE COLLECTION HCI31120375N-005BX is a heavy structural hex head bolt designed for high-load bolted connections in steel construction and industrial applications. It features a 1-1/8-7 UNC thread size with a 3-3/4 inch length measured under the head. The bolt is manufactured from steel to ASTM A325 material grade standards, which classifies it as a high-strength structural bolt suitable for demanding structural steel connections. The uncoated, bright finish indicates no additional surface treatment. Partial threading leaves a grip section under the head, which is standard practice for bearing-type and slip-critical structural joints. Licensed contractors and structural ironworkers are the typical installers.

This bolt is used in structural steel framing, heavy equipment assembly, bridge construction, and similar applications where ASTM A325 high-strength fasteners are specified by engineers or project drawings. The 1-1/8-inch diameter and partial thread pattern make it appropriate for thick-material connections where full threading would reduce shear strength at the grip. It is sold individually and is suited for both new construction and retrofit structural work requiring code-compliant high-strength hardware.

Key Features

• ASTM A325 high-strength structural bolt grade for load-bearing connections
• 1-1/8-7 UNC thread size with 3-3/4 inch length under head
• Partially threaded shank preserves grip-section shear capacity
• Uncoated bright finish — no surface treatment applied
• Inch measurement system; conforms to ASTM A325 fastener standard

Compatibility

Designed as an OEM-style structural fastener for applications specifying ASTM A325 high-strength hex head bolts in the 1-1/8-7 UNC thread series.

Installation Notes

Installation of ASTM A325 structural bolts should be performed by qualified structural ironworkers or contractors following AISC and RCSC specification requirements for high-strength bolted connections. Torque or tension verification methods — such as turn-of-nut, direct tension indicator, or calibrated wrench — should be selected per the project structural drawings. Always de-energize and lock out any adjacent electrical systems and relieve load from the connection point before removing existing fasteners. Do not substitute A325 hardware with lower-grade fasteners where A325 is structurally specified.