Value Collection HHCSI21000400-010BX Hex Head Bolt A307

Product Description

The VALUE COLLECTION HHCSI21000400-010BX is a 1-8 UNC hex head bolt designed for general structural and mechanical fastening applications. Manufactured from steel to ASTM A307 Grade A307 specifications, this bolt measures 4 inches under the head and features partial threading, leaving a smooth shank section near the head for shear-load applications. The uncoated bright finish means no coating to interfere with torque values or electrical grounding connections. At 1 pound, it is a heavy-duty fastener suited for connections requiring code-referenced structural fastener standards. Licensed trades including HVAC, plumbing, and electrical contractors routinely use A307 hex bolts for equipment mounting, structural steel connections, and equipment pad anchoring.

This hex head bolt is appropriate for residential and commercial applications where ASTM A307 fasteners are specified. Typical uses include securing HVAC equipment bases, conduit hangers, mechanical equipment frames, structural steel connections, and general-purpose bolted assemblies where a partially threaded heavy hex bolt is required. The 1-8 UNC thread form is the standard coarse-thread series for 1-inch diameter fasteners, ensuring broad compatibility with standard nuts, washers, and tapped holes in that size class.

Key Features

• ASTM A307 Grade A307 certified steel construction for structural fastening applications
• 1-8 UNC coarse thread form for broad compatibility with standard hardware
• 4-inch length under head with partial threading, providing a smooth shank for shear-load connections
• Uncoated bright finish for consistent torque values and no coating interference
• Inch measurement system for compatibility with standard US fastener specifications

Compatibility

Designed for use with standard 1-8 UNC nuts and washers in bolted assemblies requiring ASTM A307 fasteners. Compatible with structural and mechanical connections where inch-series coarse-thread hex bolts are specified.

Installation Notes

Installation should be performed by qualified tradespeople following applicable codes such as the AISC Steel Construction Manual or project-specific structural specifications. Always use a properly rated wrench or impact tool and confirm the mating nut and washer are rated for ASTM A307 service. Do not mix inch-series and metric hardware. Inspect threads for damage before installation and replace any fastener showing deformation or corrosion.