Value Collection 721501PR Flat Socket Cap Screw 1-72 Unf

Product Description

The VALUE COLLECTION 721501PR is a flat socket cap screw designed for precision fastening applications where a flush or countersunk installation is required. Featuring a No. 1-72 UNF thread and an overall length of 5/16 inches, this screw is fully threaded from head to tip. The 82-degree flat head profile seats flush in standard countersunk holes, and the hex socket drive allows torque to be applied with an Allen key or hex bit driver. Made from alloy steel with a black oxide finish, this fastener provides moderate corrosion resistance and reduced light reflection in finished assemblies. It meets ASME/ANSI B18.3 and ASTM F835 fastener standards.

This screw is suited for use in compact mechanical assemblies, precision instruments, electronics enclosures, and other applications where a low-profile head and fine-pitch thread control are critical. The UNF thread standard provides finer thread engagement than UNC, making it appropriate for thin-walled or tapped-hole applications where thread stripping must be minimized. Machinists, assembly technicians, and maintenance professionals working with small-scale hardware will find this fastener a reliable fit for tight-clearance countersunk installations.

Key Features

• 82-degree flat head profile for flush countersunk seating
• Hex socket drive for use with standard Allen keys or hex bit drivers
• No. 1-72 UNF fully threaded for fine-pitch thread engagement
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 standards
• Black oxide finish for reduced reflectivity and mild corrosion resistance
• Overall length of 5/16 inches suits compact and tight-clearance assemblies

Compatibility

Designed as a standard inch-series flat socket cap screw for use in any countersunk hole machined to accept an 82-degree flat head with a No. 1-72 UNF thread specification.

Installation Notes

Install using a correctly sized hex key or hex socket bit to avoid rounding the drive recess. Ensure the mating countersink is machined to an 82-degree angle for proper head seating. Apply appropriate thread-locking compound if vibration resistance is required in the assembly. Always verify that tapped hole depth and material are adequate for the UNF thread engagement before final torque.