Value Collection 211301PR Flat Socket Cap Screw 1/2-13

Product Description

The VALUE COLLECTION 211301PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features a 1/2-13 UNC thread size, a 2-1/4 inch overall length, and a fully threaded shank. The 82-degree flat head seats flush with the mating surface when installed in a properly countersunk hole. Manufactured from alloy steel with a black oxide finish, this screw delivers solid mechanical strength and moderate corrosion resistance for general industrial and mechanical assembly work. A licensed machinist or maintenance technician typically installs this fastener using a 5/16 inch hex socket driver.

This flat socket cap screw suits a wide range of industrial, mechanical, and structural assembly applications where a low-profile countersunk fastener is required. Common install scenarios include machine frames, tooling fixtures, equipment housings, and mechanical assemblies where the fastener head must sit flush or below the surface of the workpiece. The fully threaded shank provides maximum thread engagement for the full grip length, making it well suited for thin-material applications or through-bolted assemblies with a nut.

Key Features

• 82-degree flat head seats flush in a standard countersunk hole
• 5/16 inch hex socket drive for positive torque transfer
• Fully threaded shank maximizes thread engagement across the grip length
• Alloy steel construction provides high tensile strength
• Black oxide finish offers mild corrosion resistance and reduced light reflection
• Conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard inch-series flat socket cap screw for use in any application requiring a 1/2-13 UNC countersunk fastener with an 82-degree head angle and a 5/16 inch hex socket drive.

Installation Notes

Installation is performed by machinists, millwrights, or general maintenance technicians. The mating hole must be countersunk to an 82-degree included angle to achieve a proper flush seat. Use a calibrated torque wrench and a 5/16 inch hex key or socket bit when torquing to specification. Always verify thread engagement and inspect the countersink geometry before final assembly.