Value Collection 721140PR Flat Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION 721140PR is a flat socket cap screw designed for flush or countersunk fastening applications. It features an 82-degree flat head with a 5/32-inch hex socket drive and is fully threaded at a 1/4-20 UNC thread size with an overall length of 7/8 inches. Manufactured from alloy steel with a black oxide finish, it delivers solid mechanical strength while offering moderate corrosion resistance in protected indoor environments. This screw meets ASME/ANSI B18.3 and ASTM F835 dimensional and material standards, making it a reliable choice for precision assemblies, machinery, and structural fastening tasks performed by maintenance mechanics, machinists, and millwrights.

This flat socket cap screw is suited for applications where the fastener head must sit flush with or below the surface of the workpiece. Common uses include machine frames, jigs and fixtures, enclosures, and equipment panels in industrial, commercial, and light manufacturing settings. The hex socket drive requires an Allen wrench or hex key, allowing high torque installation in tight or recessed locations where standard wrenches cannot be used. Sold in multiples of 100 per order.

Key Features

• 82-degree flat head profile for flush or countersunk installation
• 5/32-inch hex socket drive for use with standard Allen or hex key tools
• Fully threaded 1/4-20 UNC for maximum thread engagement along the full length
• Alloy steel construction meets ASTM F835 mechanical requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 1/4-20 UNC fully threaded flat socket cap screw compatible with any tapped or through-hole application specifying an 82-degree countersink and ASME/ANSI B18.3 geometry.

Installation Notes

Installation is performed using a 5/32-inch hex key or Allen wrench driver. Ensure the mating countersink is machined to an 82-degree included angle to achieve full head seating and proper clamp load. Power down or de-energize any equipment before accessing fastener locations on live assemblies. Do not use impact drivers without a proper hex socket bit rated for socket head cap screws, as cam-out can damage the drive recess.