Value Collection 211105P Flat Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION 211105P is a 1/4-20 x 1/2 inch flat socket cap screw designed for flush or countersunk fastening applications in mechanical assemblies, fixtures, and fabricated components. The 82-degree flat head seats cleanly into countersunk holes, keeping the fastener profile at or below the work surface. Drive engagement is via a 5/32 inch hex socket. Constructed from alloy steel with a black oxide finish, this fastener delivers solid tensile strength and moderate corrosion resistance in indoor and protected environments. It is fully threaded along its 1/2 inch overall length and conforms to UNC thread standards. Typically installed by machinists, millwrights, equipment technicians, and general trade professionals.

This screw is suited for use in machine frames, jigs, tooling plates, panel assemblies, and any application requiring a low-profile flush fastener. The UNC 1/4-20 thread is one of the most common inch-series thread configurations in North American mechanical work, making this screw a frequent fit in both OEM and aftermarket assembly contexts. Minimum order quantity is 100 pieces. Each package contains 1 piece, so orders must be placed in multiples of 100.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 5/32 inch hex socket drive for precise torque application with standard Allen keys
• Fully threaded 1/2 inch overall length for maximum thread engagement in thin stock
• Alloy steel construction for high tensile load capacity
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in any countersunk application requiring a 1/4-20 UNC inch-series flat socket cap screw with an 82-degree head angle, conforming to ASME/ANSI B18.3 and ASTM F835 standards.

Installation Notes

Install using a 5/32 inch hex key or Allen driver; ensure the driver is fully seated in the socket before applying torque to avoid rounding the drive recess. Countersink the mating material to 82 degrees to achieve a proper flush-seat condition. Black oxide finish is not rated for outdoor or high-humidity exposure without additional protective coating. Follow applicable machine assembly standards and safety procedures when torquing fasteners in structural or load-bearing applications.