Value Collection 872151PR Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 872151PR is a hex socket cap screw designed for secure, high-torque fastening in industrial, mechanical, and structural applications. It features a 1/4-20 UNC thread size with a 7/8-inch length under head and is fully threaded for maximum thread engagement along the entire shank. The 3/16-inch hex drive socket head accepts a standard Allen key or hex bit driver. Constructed from alloy steel with a zinc-plated finish for corrosion resistance, this fastener meets ASME B18.8 and ASTM A574 standards. Machinists, millwrights, and maintenance technicians install this type of screw in equipment assemblies requiring a flush or recessed fastener head.

This socket cap screw is suited for general manufacturing, machine building, jig and fixture work, and equipment maintenance across a wide range of industries. The 1/4-20 UNC thread is one of the most common unified coarse thread specifications, making this fastener compatible with standard tapped holes in metal housings, brackets, and assemblies. It is sold individually but is subject to a minimum order quantity of 100 pieces, making it appropriate for shop stock or production line replenishment.

Key Features

• 1/4-20 UNC thread for compatibility with standard unified coarse tapped holes
• Fully threaded shank provides maximum thread engagement and clamping force
• 3/16-inch hex socket drive accepts standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical requirements
• Zinc-plated finish provides baseline corrosion protection in dry or mildly humid environments
• Meets ASME B18.8 dimensional standard for socket cap screws

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any application requiring a fastener conforming to ASME B18.8 and ASTM A574 specifications.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or mechanical assemblers using a 3/16-inch hex key or Allen driver. Ensure the mating tapped hole is clean and free of debris before installation. Do not use impact drivers at full torque without a torque-limiting attachment, as over-torquing alloy socket cap screws can cause thread stripping or head failure. Follow the applicable equipment manufacturer torque specification for 1/4-20 fasteners in the specific joint material.