Value Collection MS16997-86 Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION MS16997-86 is a partially threaded hex socket cap screw designed for high-strength fastening applications. It features a 5/16-18 UNC thread, a 2-1/2 inch length under the head, and accepts a 1/4 inch hex drive. Manufactured from alloy steel to material grade 4037, the fastener carries a yellow cadmium-plated finish that provides corrosion resistance in demanding environments. Conforming to ASME B18.3, this screw is suited for precision mechanical assemblies, machine components, and structural connections where torque capacity and dimensional accuracy are critical.

This screw is used across industrial, mechanical, and structural applications where a recessed hex drive is required for controlled torque installation. The partially threaded shank provides a clamping grip without thread engagement through the full fastener body, which is common in machine assemblies requiring a smooth shank bearing surface. Suitable for use in manufacturing equipment, tooling fixtures, and general mechanical assembly work performed by machinists, millwrights, and maintenance technicians.

Key Features

• 5/16-18 UNC thread for standard inch-series fastening applications
• 2-1/2 inch length under head with partial threading for smooth-shank clamping
• 1/4 inch hex socket drive for use with standard Allen keys and hex bit drivers
• Alloy steel grade 4037 construction for high tensile strength
• Yellow cadmium-plated finish for corrosion protection in harsh environments
• Meets ASME B18.3 dimensional and performance standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for 5/16-18 UNC threaded applications in industrial and mechanical assemblies requiring a 1/4 inch hex drive.

Installation Notes

Installation requires a 1/4 inch hex key or Allen-type socket driver. Always ensure the mating threaded hole or nut meets the same thread standard before driving the fastener. Power down and de-energize any equipment before replacing fasteners in live assemblies. Do not exceed the torque rating appropriate for the material grade and thread size as specified by the applicable engineering standard or equipment manufacturer.