Value Collection 211171P Flat Socket Cap Screw 5/16-18 X 2 in

Product Description

The VALUE COLLECTION 211171P is a flat socket cap screw designed for applications requiring a flush or countersunk fastening profile. Built from alloy steel with a black oxide finish, this screw features an 82-degree flat head and a 3/16-inch hex socket drive. The 5/16-18 UNC thread is fully threaded along the 2-inch overall length, making it suitable for through-bolting in metal, structural, and mechanical assemblies. It meets ASME/ANSI B18.3 and ASTM F835 standards. Machinists, millwrights, and maintenance technicians working in industrial and commercial settings regularly install this fastener type.

This flat socket cap screw is well-suited for applications where a raised head would interfere with mating surfaces or moving components. Common uses include machine frames, fixtures, tooling plates, and equipment panels where a flush seating surface is required. The hex socket drive allows access in recessed or tight clearance locations where a standard wrench cannot reach. The black oxide finish provides mild corrosion resistance and reduces surface glare in precision assemblies.

Key Features

• 82-degree flat head profile for countersunk, flush-mount installations
• 3/16-inch hex socket drive for use with standard Allen or hex key tools
• Fully threaded 5/16-18 UNC along the full 2-inch overall length
• Alloy steel construction for high tensile strength in demanding applications
• Black oxide finish provides mild corrosion resistance and a low-glare surface
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-service flat socket cap screw for machinery, fixtures, and structural assemblies requiring a 5/16-18 UNC fully threaded fastener with an 82-degree countersunk head.

Installation Notes

Installation is performed using a 3/16-inch hex key or Allen driver; ensure the driver is fully seated before applying torque to avoid cam-out and socket damage. Countersink the receiving hole to 82 degrees to achieve a proper flush seat. Power down and de-energize any equipment before fastener replacement on live machinery. Follow applicable ASME and facility maintenance codes for fastener installation in structural or load-bearing applications.