Value Collection C703402 Hex Head Cap Screw 5/8-11 Grade 8

Product Description

The Value Collection C703402 is a fully threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Sized at 5/8-11 UNC thread with a 1-1/4 inch length under head, this screw meets ASME B18.2.1 standards and is manufactured from Grade 8 steel, which provides the high tensile strength required for demanding bolted joints. The uncoated finish makes it a straightforward choice where secondary treatment or galvanic considerations are handled by the installer. Each package contains 50 pieces. Licensed trades and industrial maintenance personnel routinely specify Grade 8 hardware for critical connection points where lower-grade fasteners are not acceptable.

This hex head cap screw is suited for heavy-duty mechanical assemblies, equipment mounting, structural steel connections, and industrial maintenance and repair work. The fully threaded shank allows maximum thread engagement across the clamped material, making it appropriate for applications where the fastener threads through both parts. It is commonly used in manufacturing environments, HVAC equipment mounting, pump and motor assemblies, and general plant maintenance where inch-series, high-strength fasteners are specified.

Key Features

• Grade 8 steel construction provides high tensile strength for demanding bolted joints
• Fully threaded shank allows complete thread engagement through the clamped material
• 5/8-11 UNC thread series conforms to standard inch fastener tooling and nuts
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• Uncoated finish for use where coating compatibility is managed separately
• Sold in a 50-piece package for bench stock and maintenance inventory

Compatibility

Designed for use with standard 5/8-11 UNC hex nuts, flat washers, and lock washers conforming to inch-series fastener standards. Suitable for any assembly calling out a Grade 8, 5/8-11 x 1-1/4 inch fully threaded hex head cap screw per ASME B18.2.1.

Installation Notes

Installation should be performed by qualified mechanical or maintenance personnel familiar with proper fastener torque practices for Grade 8 hardware. Always de-energize and de-pressurize the equipment being serviced before replacing or tightening fasteners. Use a calibrated torque wrench and consult the equipment manufacturer's torque specifications for the joint being assembled, as Grade 8 fasteners require higher clamp loads than lower-grade hardware. Inspect threads for damage or contamination before installation and ensure the mating nut or tapped hole is also rated for the application load.