Value Collection 3168CH5O Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 3168CH5O is a partially threaded hex head cap screw designed for general industrial and mechanical fastening applications. It measures 5/16-18 thread size with a 4.25-inch length under head and is manufactured from Grade 5 steel with a zinc-plated finish for corrosion resistance. The Unified National Coarse (UNC) thread form meets ASME B18.2.1 and SAE J429 standards, making it a reliable choice for structural and mechanical assemblies. This screw is driven with a 1/2-inch hex key or standard hex socket. Machinists, millwrights, maintenance technicians, and industrial assemblers commonly use this fastener across a wide range of equipment and fixture applications.

This hex head cap screw is suited for use in light to medium structural assemblies, machinery frames, equipment mounting, and general fabrication work where a partially threaded fastener is required to draw clamped materials together without threading the full grip length. The zinc plating provides a baseline level of corrosion protection appropriate for indoor and light-duty outdoor environments. The Grade 5 rating indicates a tensile strength of 120,000 psi, making it appropriate for moderate-load fastening scenarios in both residential and commercial settings.

Key Features

• Grade 5 steel construction with 120,000 psi tensile strength
• Zinc-plated finish provides corrosion resistance for general-purpose use
• Partially threaded shank allows clamping force without threading the full grip
• UNC thread form per ASME B18.2.1 and SAE J429 standards
• 1/2-inch hex drive compatible with standard sockets and wrenches

Compatibility

Designed as a standard UNC Grade 5 hex head cap screw compatible with 5/16-18 threaded holes and nuts in general industrial, mechanical, and fabrication assemblies.

Installation Notes

Installation requires a 1/2-inch hex socket or open-end wrench. Ensure the mating threaded hole or nut is clean and free of debris before driving. Do not exceed the rated tensile strength of the fastener for the intended joint load. Follow applicable industry standards and engineering specifications for torque and joint design.