Value Collection C703072 Hex Cap Screw 5/16-18 X 2-3/4 in Grade 8

Product Description

The VALUE COLLECTION C703072 is a Grade 8 steel hex head cap screw with a 5/16-18 UNC thread and a 2-3/4 inch length under head. It is partially threaded and left uncoated, making it suited for applications where an aftermarket coating will be applied or where bare steel is acceptable. Grade 8 fasteners deliver higher tensile strength than Grade 5 hardware, making this screw appropriate for structural and high-load mechanical assemblies. The hex drive head accepts standard wrenches and sockets. Meets ASME B18.2.1 dimensional standards for inch-series hex head cap screws.

This fastener is used in general industrial, mechanical, and equipment assembly applications where a high-strength inch-series UNC cap screw is required. Typical installation scenarios include machine frames, brackets, flanges, and structural connections in both light and heavy equipment. It is commonly specified by millwrights, maintenance mechanics, and fabricators working to inch-series fastener standards. Sold in packages of 50 units.

Key Features

• Grade 8 steel construction for high tensile strength in demanding mechanical assemblies
• 5/16-18 UNC thread form for compatibility with standard inch-series hardware
• 2-3/4 inch length under head, partially threaded for shank grip in structural joints
• Uncoated finish — suitable for painting, plating, or use as-is in dry environments
• Meets ASME B18.2.1 dimensional standard for hex head cap screws
• Packaged in quantities of 50 for shop stock and production use

Compatibility

Designed as a standard inch-series replacement or stock fastener for any application requiring a 5/16-18 UNC hex head cap screw with a 2-3/4 inch length under head at Grade 8 strength.

Installation Notes

Installation should be performed by qualified mechanics or tradespeople familiar with fastener torque requirements for Grade 8 hardware. Always use a calibrated torque wrench and follow the applicable equipment manufacturer torque specifications for the joint being assembled. Ensure mating threads are clean and free of debris before installation. Do not mix Grade 8 fasteners with lower-grade nuts or inserts, as this can compromise joint integrity.