Value Collection 721254PR Flat Socket Cap Screw 1/2-20

Product Description

The VALUE COLLECTION 721254PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features a 1/2-20 UNF thread with an overall length of 2.25 inches and is fully threaded along its entire length. The 82-degree flat head seats flush with the mating surface, while the 5/16-inch hex socket drive accepts a standard hex key for installation and removal. Constructed from alloy steel with a black oxide finish, this screw is suited for moderate corrosion resistance and reduced light reflection in industrial and mechanical assemblies. Machinists, millwrights, and maintenance mechanics are the typical installers.

This flat socket cap screw is used in machine assemblies, fixture plates, jigs, tooling, and structural components where a flush fastener surface is required. The fully threaded 1/2-20 UNF shank allows full thread engagement across a range of material thicknesses. Black oxide finish is appropriate for interior or lightly protected environments. The screw conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards, making it a recognized fit for precision mechanical applications in both light manufacturing and maintenance settings.

Key Features

• 82-degree flat head profile for flush countersunk installations
• 5/16-inch hex socket drive for secure torque application with a standard hex key
• 1/2-20 UNF fully threaded shank, 2.25 inches overall length
• Alloy steel construction for high tensile strength in demanding assemblies
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNF flat socket cap screw for use in any tapped or through-hole application requiring a 1/2-20 thread pitch and an 82-degree countersunk seating surface.

Installation Notes

Installation is performed by machinists or maintenance mechanics using a 5/16-inch hex key or hex bit driver. Ensure the mating countersink is machined to an 82-degree included angle to achieve proper head seating. De-energize and lock out any machinery before fastener service in accordance with applicable OSHA lockout/tagout procedures. Do not substitute an incorrect hex key size, as rounding the socket drive can make removal difficult.