Value Collection 36821 Flat Socket Cap Screw 5/16-18 X 1/2 in

Product Description

The Value Collection 36821 is a flat socket cap screw designed for applications requiring a flush or countersunk fastening profile. It features an 82-degree flat head driven by a 3/16-inch hex socket, making it compatible with standard Allen wrenches and hex key sets. Manufactured from alloy steel with a black oxide finish, this screw offers good mechanical strength and moderate corrosion resistance in dry or lightly oiled environments. The 5/16-18 UNC thread is fully threaded along the 1/2-inch overall length. It meets ASME/ANSI B18.3 and ASTM F835 fastener standards. Installers in mechanical, HVAC, electrical, and industrial maintenance trades use this type of fastener when a low-profile head is required.

This screw is suited for use in machine assemblies, equipment panels, brackets, and structural components where a countersunk seating surface is present. The 5/16-18 UNC thread is one of the most common inch-series coarse thread specifications, making the 36821 a straightforward drop-in for general mechanical and trade service work. The black oxide finish blends into ferrous assemblies and provides a modest level of surface protection. It is sold individually but carries a minimum order quantity of 25 pieces.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 3/16-inch hex socket drive for Allen wrench or hex bit installation
• Alloy steel construction for high tensile strength
• Black oxide finish provides light corrosion resistance and low reflectivity
• Fully threaded 5/16-18 UNC along the full 1/2-inch length
• Meets ASME/ANSI B18.3 and ASTM F835 standards

Compatibility

Designed as a standard inch-series flat socket cap screw for use in any application requiring a 5/16-18 UNC countersunk fastener with a hex socket drive.

Installation Notes

Installation requires a 3/16-inch hex key or hex socket bit. Ensure the mating material has an 82-degree countersunk hole to achieve full flush seating. Power down or de-energize any equipment before fastener service in electrical or mechanical assemblies. Apply thread lubricant or thread-locking compound as required by the assembly specification.