Value Collection 721160PR Flat Socket Cap Screw 1/4-28

Product Description

The VALUE COLLECTION 721160PR is a flat socket cap screw designed for precision fastening applications requiring a flush or countersunk head profile. With a 1/4-28 UNF thread and an overall length of 2.5 inches, this fastener is partially threaded and driven by a 5/32-inch hex socket. The 82-degree flat head seats flush with the work surface, reducing snag points in assemblies where clearance matters. Constructed from alloy steel with a black oxide finish, it delivers solid mechanical strength and moderate corrosion resistance. Installed by machinists, maintenance technicians, and industrial assemblers across a wide range of fabrication and mechanical applications.

This screw is suited for applications where a countersunk, low-profile fastener is required on metal assemblies, fixtures, and mechanical components. The 1/4-28 UNF fine thread provides tighter thread engagement and greater resistance to vibration loosening compared to coarse-thread equivalents. The partial threading allows the smooth shank to bear shear loads, making it appropriate for applications where shank strength and precise hole alignment are priorities. Typical use environments include machine shops, industrial maintenance, and mechanical assembly operations.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• 1/4-28 UNF fine thread for tight engagement and vibration resistance
• 5/32-inch hex socket drive for precise torque application
• Partially threaded shank supports shear load bearing and alignment
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 standards
• Black oxide finish provides surface protection and reduces light reflection

Compatibility

Designed as a standard 1/4-28 UNF flat socket cap screw conforming to ASME/ANSI B18.3 and ASTM F835, compatible with any application requiring an 82-degree countersunk hex socket fastener in that thread size and length.

Installation Notes

Installation is performed with a 5/32-inch hex key or hex socket driver. Ensure the mating countersink is machined to an 82-degree included angle for proper head seating. De-energize and lock out any equipment before fastener replacement or adjustment in powered machinery. Follow applicable torque specifications from your assembly drawings or engineering standards, as no product-specific torque value is provided with this fastener.