Value Collection HCI31120750N-005BX Hex Head Bolt A325

Product Description

The VALUE COLLECTION HCI31120750N-005BX is a heavy-duty hex head bolt engineered for structural and high-strength bolted connections. Manufactured from A325-grade steel with a bright uncoated finish, this bolt features a 1-1/8-7 UNC thread pattern and measures 7-1/2 inches in length under the head. The partial thread configuration concentrates clamping force at the grip length, which is standard practice in structural steel connections. It meets ASTM A325 requirements, making it appropriate for use in structural steel fabrication, heavy equipment assembly, and industrial construction where load-rated fasteners are specified by engineering drawings or applicable codes.

This bolt is suited for use in structural steel framing, bridgework, heavy machinery mounting, and similar applications where ASTM A325 compliance is required by specification. The 1-1/8-7 UNC thread is a common heavy fastener size found in steel-to-steel connections, base plate anchoring, and beam splice assemblies. Installation is typically performed by ironworkers, structural welders, or millwrights working under engineered connection specifications. Compatible with standard heavy hex nuts and hardened washers of the same diameter and thread standard.

Key Features

• ASTM A325 structural bolt rating for high-strength bolted connections
• 1-1/8-7 UNC thread — heavy coarse-thread pattern for structural applications
• Partially threaded shank concentrates bearing load across the grip length
• Bright uncoated finish — suitable for painted, galvanized, or coated mating surfaces
• 7-1/2 inch length under head accommodates thick steel stack-ups and splice connections
• Inch measurement system; compatible with standard heavy hex nuts and F436 hardened washers

Compatibility

Designed as an ASTM A325 structural hex head bolt for use with standard 1-1/8 inch heavy hex nuts and hardened washers in structural steel assemblies per AISC and RCSC specification requirements.

Installation Notes

Installation of A325 structural bolts must be performed by qualified ironworkers or mechanics following the Research Council on Structural Connections (RCSC) Specification for Structural Joints and any applicable project engineering documents. Always verify that mating nuts, washers, and hole tolerances conform to the connection design before installation. Tighten to the snug-tight condition first, then proceed with the specified tensioning method — turn-of-nut, calibrated wrench, twist-off, or direct tension indicator — as called out in the connection specification. Do not reuse A325 bolts that have been fully pretensioned unless permitted by the engineer of record.