Value Collection 872219PR Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 872219PR is a hex socket cap screw designed for applications requiring a secure, recessed-drive fastener. Threaded to 5/16-18 UNC and measuring 3 inches in length under the head, this screw is partially threaded and driven with a 1/4-inch hex key. It is constructed from alloy steel with a zinc-plated finish, providing corrosion resistance suitable for general mechanical and structural assemblies. Licensed tradespeople and industrial maintenance technicians rely on this fastener type for machine frames, brackets, and equipment panels where a flush or recessed head profile is required.

This screw is suited for residential and commercial maintenance, fabrication, and repair work. The partially threaded shank allows the screw to draw mating parts together without threading through the full length of the joint, which is useful when clamping two workpieces or securing a component to a tapped hole of defined depth. It meets ASME B18.8 and ASTM A574 standards, making it appropriate for mechanical assemblies where dimensional and strength conformance is required.

Key Features

• 5/16-18 UNC thread size for broad compatibility with standard tapped holes
• 3-inch length under head with partial threading for clamping applications
• 1/4-inch hex drive for use with standard hex keys and socket drivers
• Alloy steel construction for high tensile strength
• Zinc-plated finish for corrosion resistance in general-use environments
• Meets ASME B18.8 and ASTM A574 standards

Compatibility

Designed as an OEM-style replacement or general-use fastener for any application requiring a 5/16-18 UNC hex socket cap screw with a 3-inch length under head and 1/4-inch drive.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated hex key or socket driver. Always ensure the receiving tapped hole is clean and free of debris before installation. Do not overtighten; consult applicable torque specifications from the equipment manufacturer or relevant fastener standards. Follow all applicable safety procedures when working on powered equipment.