Value Collection 581365PR Hex Socket Cap Screw 1/4-20 Unc

Product Description

The Value Collection 581365PR is a hex socket cap screw designed for high-strength fastening in mechanical, industrial, and trade applications. It features a 1/4-20 UNC thread size with full threading along a 5/16 inch length under the head. The recessed 3/16 inch hex drive requires an Allen key or hex bit driver, making it well suited for installations where clearance is limited or a low-profile fastener head is required. Made from alloy steel with a black oxide finish, this screw offers solid tensile strength and moderate corrosion resistance for dry or lightly protected environments. Machinists, maintenance technicians, and general contractors install this fastener type across a wide range of equipment assembly and repair tasks.

This cap screw is appropriate for use in general mechanical assemblies, machine guarding, fixture construction, tooling, and equipment fabrication. Its fully threaded shank and fine-tolerance UNC thread profile allow secure engagement in tapped holes where thread stripping resistance and consistent clamp load are priorities. The black oxide coating provides a matte finish that reduces light reflection in precision or optical equipment enclosures and offers mild surface protection compared to bare steel.

Key Features

• 1/4-20 UNC thread size for broad compatibility with standard inch-pattern tapped holes
• Fully threaded 5/16 inch length under the head for maximum thread engagement in shallow tapped bores
• 3/16 inch internal hex drive for use with Allen keys or hex bit drivers
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards for socket cap screws
• Black oxide coating provides mild corrosion resistance and a non-reflective matte finish

Compatibility

Designed as a standard inch-series socket cap screw for use in any application requiring a 1/4-20 UNC fully threaded fastener per ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation requires a 3/16 inch hex key or hex bit rated for the torque demands of the application. Ensure the mating tapped hole meets 1/4-20 UNC thread specifications and is free of debris before driving the screw. Power down or de-energize any equipment before accessing fastened assemblies in electrical or mechanical enclosures. Do not exceed the torque limits defined by the ASTM A574 standard for this screw size and grade.