Value Collection 211313PR Flat Socket Cap Screw 1/2-20

Product Description

The VALUE COLLECTION 211313PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head driven by a 5/16-inch hex socket, making it compatible with standard Allen wrenches and hex key sets. The screw is fully threaded with a 1/2-20 UNF thread and measures 1-1/2 inches in overall length. Constructed from alloy steel with a black oxide finish, it offers solid mechanical strength and moderate corrosion resistance. Machinists, millwrights, and maintenance technicians commonly install this type of fastener in precision assemblies, jigs, fixtures, and machine components where a low-profile head is required.

This flat socket cap screw is suited for industrial and mechanical applications where UNF fine-thread engagement is needed for tighter tolerances or vibration resistance. The 82-degree flat head seats flush with the mating surface when installed in a properly countersunk hole. It is appropriate for use in metalworking, manufacturing equipment, and general mechanical assemblies. The black oxide finish reduces light reflection and provides a degree of surface protection in dry or mildly humid indoor environments. This fastener meets ASME/ANSI B18.3 and ASTM F835 standards.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 5/16-inch hex socket drive accepts standard Allen wrenches
• 1/2-20 UNF fully threaded shank for fine-thread engagement
• Alloy steel construction for high tensile strength
• Black oxide finish for surface protection and reduced glare
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard fastener for mechanical assemblies requiring a 1/2-20 UNF flat socket cap screw with an 82-degree countersink angle and a 1-1/2-inch overall length.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians. The mating component must be drilled and countersunk to an 82-degree angle to achieve a flush seating surface. Use a calibrated torque wrench with a 5/16-inch hex bit to drive the fastener to the torque specification required by the assembly drawing. De-energize and lock out any equipment before replacing fasteners in live mechanical systems.