Value Collection 721076PR Flat Socket Cap Screw 6-40x3/8 in

Product Description

The VALUE COLLECTION 721076PR is a flat socket cap screw designed for precision fastening applications where a flush or countersunk surface finish is required. Featuring a hex socket drive and fully threaded shank, this screw is manufactured from alloy steel with a black oxide finish that provides moderate corrosion resistance and reduces light reflection. The 6-40 UNF thread size and 3/8-inch overall length make it well suited for tight-tolerance assemblies in mechanical, industrial, and tooling applications. Installation requires a 5/64-inch hex key. This fastener meets ASME/ANSI B18.3 and ASTM A835 standards.

This flat socket cap screw is used in applications where a standard hex cap screw head would protrude beyond the mating surface. Common installation scenarios include machinery guarding, fixture plates, precision instrument housings, jigs, and tooling blocks. The countersunk flat head seats flush with or below the workpiece surface when installed into a properly machined countersink. Machinists, tool and die makers, and mechanical assembly technicians typically install this fastener in production and maintenance environments.

Key Features

• Flat countersunk head seats flush with mating surface for clean, snag-free assemblies
• Hex socket drive accepts a 5/64-inch Allen key for precise torque application in recessed spaces
• Fully threaded shank provides maximum thread engagement across the full fastener length
• Alloy steel construction delivers high tensile strength for demanding mechanical applications
• Black oxide finish reduces surface reflectivity and provides light corrosion protection
• Meets ASME/ANSI B18.3 and ASTM A835 dimensional and material standards

Compatibility

Designed as a standard UNF-thread flat socket cap screw for use in any application requiring a 6-40 thread and 3/8-inch overall length countersunk fastener machined to ASME/ANSI B18.3 specifications.

Installation Notes

Install into a properly machined 82-degree flat countersink to achieve a flush seating surface. Use a calibrated 5/64-inch hex key or bit driver to drive the fastener and avoid stripping the socket. Ensure the mating thread is clean and free of debris before installation. Do not exceed the torque capacity of the 6-40 thread to avoid fastener failure or thread damage.