Value Collection 211315PR Flat Socket Cap Screw 1/2-20

Product Description

The VALUE COLLECTION 211315PR is a flat socket cap screw designed for flush or countersunk fastening applications in precision mechanical assemblies. It features an 82-degree flat head profile and a 5/16-inch hex socket drive, allowing installation with a standard Allen wrench or hex bit. The screw measures 1/2-20 x 1-3/4 inches overall length, with fully threaded construction along the entire shank. Manufactured from alloy steel with a black oxide finish, it offers solid mechanical strength and moderate corrosion resistance suitable for indoor and controlled-environment use. Licensed mechanics, machinists, and maintenance technicians install this type of fastener across industrial, automotive, and equipment assembly applications.

This flat socket cap screw is suited for applications requiring a low-profile, countersunk head that sits flush with or below the mating surface. The 1/2-20 UNF thread pattern makes it compatible with fine-thread tapped holes in steel, aluminum, and other engineered materials. It is commonly installed in machine frames, fixture plates, tooling assemblies, and mechanical enclosures where head clearance is limited. The black oxide finish blends into dark or finished metal surfaces and provides light lubricity during installation. Fully threaded construction allows engagement across the full grip range for shorter fastening applications.

Key Features

• 82-degree flat head profile for flush or countersunk installations
• 5/16-inch hex socket drive for Allen wrench or hex bit installation
• 1/2-20 UNF fully threaded shank for fine-thread tapped hole compatibility
• Alloy steel construction for high tensile strength in demanding assemblies
• Black oxide finish provides light corrosion resistance and a low-profile appearance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard fastener for applications requiring a 1/2-20 UNF flat socket cap screw conforming to ASME/ANSI B18.3 and ASTM F835 specifications.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians using a properly sized 5/16-inch hex key or socket bit. Ensure the mating tapped hole is clean, correctly sized, and free of debris before installation. Apply appropriate thread lubricant or thread-locking compound per assembly requirements. Do not exceed the rated drive torque for the fastener size to avoid stripping the hex socket or damaging the mating threads.