Value Collection 211169P Flat Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 211169P is a flat socket cap screw designed for countersunk fastening applications requiring a flush or recessed head profile. It features an 82-degree flat head with a 3/16-inch hex socket drive and a 5/16-18 UNC thread on a 1-3/4-inch overall length. The fastener is fully threaded and manufactured from alloy steel with a black oxide finish, providing moderate corrosion resistance and reduced light reflection. Machinists, millwrights, fabricators, and maintenance technicians install this style of fastener where a smooth, low-profile surface is required after assembly.

This flat socket cap screw is suited for use in machine components, fixtures, jigs, and mechanical assemblies where a protruding head is not acceptable. The 5/16-18 UNC thread is a common inch-series coarse thread, compatible with standard tapped holes and threaded inserts across a wide range of industrial and OEM applications. The black oxide finish makes it a practical choice in environments where glare reduction or a clean finished appearance is preferred alongside adequate surface protection.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• 3/16-inch hex socket drive for use with standard hex keys or Allen drivers
• 5/16-18 UNC fully threaded shank for maximum thread engagement
• Alloy steel construction provides high tensile strength for demanding fastening applications
• Black oxide finish offers mild corrosion resistance and low-glare appearance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in standard 5/16-18 UNC tapped holes and countersunk bores with an 82-degree included angle, as specified by ASME/ANSI B18.3 for flat socket cap screws in inch-series applications.

Installation Notes

Install using a properly sized 3/16-inch hex key or socket driver to avoid rounding the drive recess. Ensure the mating hole is countersunk to the correct 82-degree angle and depth to achieve a fully flush seating surface. De-energize and lock out any machinery before fastener replacement or removal in live equipment. Follow applicable torque guidelines from ASME or the equipment manufacturer for 5/16-18 alloy steel fasteners.