Value Collection MS16997-84 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION MS16997-84 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling, and structural connections. Built from 4037 alloy steel with a yellow cadmium-plated finish, it offers corrosion resistance and durability under load. The screw features a 5/16-18 UNC thread size, a 2-inch length under head, and partial threading along the shank. Drive engagement is via a 1/4-inch hex socket. It meets ASME B18.3 standards, making it suitable for applications where dimensional and strength compliance is required.

This screw is used across a wide range of industrial and mechanical applications including machine frames, jigs, fixtures, brackets, and equipment assemblies. Partial threading provides a stronger shank section for applications requiring shear resistance or precise positioning. The yellow cadmium coating is common in aerospace-adjacent and general industrial environments where mild corrosion protection and a controlled friction coefficient are needed. It is typically installed by machinists, millwrights, maintenance technicians, and fabricators.

Key Features

• 5/16-18 UNC thread for reliable engagement with standard tapped holes
• 2-inch length under head with partial threading for shear-load applications
• 4037 alloy steel construction for high tensile strength
• Yellow cadmium-plated finish for corrosion and wear resistance
• 1/4-inch hex socket drive for positive torque transfer
• Meets ASME B18.3 dimensional standard

Compatibility

Designed as an OEM-style replacement or standard-service fastener for applications requiring 5/16-18 UNC hex socket cap screws per ASME B18.3.

Installation Notes

Installation requires a 1/4-inch hex key or socket driver. Ensure mating threads are clean and properly tapped to 5/16-18 UNC before installation. De-energize or lock out any equipment before servicing fasteners on powered assemblies. Do not use an impact driver without a torque-limiting adapter, as cadmium-plated fasteners can gall or strip if overdriven.