Value Collection C703804 Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION C703804 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical assemblies, structural connections, and industrial equipment. Manufactured from Grade 8 steel in an uncoated finish, this fastener meets ASME B18.2.1 dimensional standards. The 1-1/4-7 UNC thread size and 3-inch length under head make it suitable for demanding load-bearing joints where standard Grade 5 hardware is insufficient. Grade 8 steel provides significantly higher tensile and proof-load ratings than lower-grade alternatives. Sold in a package of 5 pieces, this screw is stocked for trade and maintenance use.

This cap screw is used in heavy-duty mechanical and structural applications including equipment mounting, machinery frames, and maintenance repair operations across industrial and commercial settings. The UNC thread form is the standard for inch-series fastening in North American mechanical systems. Fully threaded construction allows for consistent clamping force along the entire bolt length, making it well suited for through-bolting applications where a nut and washer are used. Licensed trades including millwrights, pipefitters, and industrial maintenance technicians commonly specify Grade 8 hardware for high-vibration and high-load environments.

Key Features

• Grade 8 steel construction for high tensile and proof-load performance
• Fully threaded shaft maximizes thread engagement in through-bolt applications
• 1-1/4-7 UNC thread standard for compatibility with standard inch-series nuts and tapped holes
• 3-inch length under head suits medium to heavy flange and plate connections
• Uncoated finish; suitable for dry or protected environments where coating is not required
• Meets ASME B18.2.1 dimensional standards for hex head cap screws

Compatibility

Designed for use with 1-1/4-7 UNC hex nuts and washers in standard inch-series bolted connections conforming to ASME B18.2.1 specifications.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson following applicable equipment manufacturer torque guidelines for Grade 8 fasteners. Ensure mating threads and seating surfaces are clean and free of debris before assembly. Do not substitute a lower-grade nut on a Grade 8 bolt in structural or high-load joints. Follow applicable industry codes and equipment service manuals for proper preload and fastener reuse policies.