Value Collection A997091 Flat Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION A997091 is a flat socket cap screw designed for flush or countersunk fastening applications in metal assemblies, fixtures, and mechanical components. It features an 82-degree flat head profile with a 5/32-inch hex socket drive and is fully threaded along its 7/8-inch overall length. The 1/4-20 UNC thread pattern is a widely used coarse-thread standard. Manufactured from alloy steel with a black oxide finish, this fastener delivers solid mechanical strength and moderate corrosion resistance in indoor or protected environments. It is typically installed by machinists, millwrights, and maintenance technicians using a standard hex key or Allen wrench.

This screw is suited for use in panel mounting, equipment enclosures, jig and fixture fabrication, and general mechanical assembly where a low-profile flush head is required. The black oxide finish reduces light reflection and provides a degree of surface protection against oxidation. The fully threaded shank maximizes thread engagement across the full fastened length, which is particularly useful in thin material applications or short blind holes.

Key Features

• 82-degree flat head profile for flush or countersunk seating in standard countersunk holes
• 5/32-inch hex socket drive compatible with standard Allen keys and hex bit drivers
• Fully threaded 7/8-inch overall length for maximum thread engagement
• 1/4-20 UNC coarse thread for broad tooling and hardware compatibility
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 fastener standards
• Black oxide finish provides mild corrosion resistance and a low-reflectance appearance

Compatibility

Designed for use in standard 82-degree countersunk holes sized for 1/4-20 UNC flat socket cap screws per ASME/ANSI B18.3. Suitable for tapped holes in steel, aluminum, and other metals in general mechanical and industrial assembly applications.

Installation Notes

Install using a 5/32-inch hex key or Allen driver; ensure the countersink angle matches the 82-degree head profile to achieve a proper flush seat. Verify that tapped hole thread engagement meets applicable mechanical design requirements before torquing. Black oxide finish does not provide significant outdoor corrosion protection — apply supplemental coating or lubricant if exposed to moisture. Follow applicable machine design codes and torque guidelines for 1/4-20 alloy steel fasteners based on joint requirements.