Value Collection 211161P Flat Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 211161P is a flat socket cap screw designed for flush or countersunk fastening applications in metal assemblies, fixtures, and machinery. It features an 82-degree flat head profile and a 3/16-inch hex socket drive, allowing installation with a standard hex key. Sized at 5/16-18 x 3/4 inches overall length and fully threaded, this screw is machined from alloy steel and finished with a black oxide coating that provides mild corrosion resistance and a low-reflectance appearance. It conforms to ASME/ANSI B18.3 and ASTM F835 standards. Machinists, millwrights, and maintenance technicians are the typical installers.

This fastener is suited for applications where a screw head must sit flush with or below the mating surface. Common uses include machine frames, tool fixtures, equipment enclosures, and structural assemblies that require a clean, snag-free surface. The UNC 5/16-18 thread pitch is one of the most common inch-series coarse thread sizes, making this screw broadly compatible with standard tapped holes in steel, aluminum, and similar materials. It is sold in a minimum order quantity of 100 pieces per order, with a package quantity of 1.

Key Features

• 82-degree flat head seats flush in standard countersunk holes per ASME/ANSI B18.3
• 3/16-inch hex socket drive for precise torque application with a hex key or hex bit driver
• Fully threaded 3/4-inch overall length for maximum thread engagement in thinner stock
• Alloy steel construction provides high tensile strength suitable for load-bearing fastening
• Black oxide finish reduces light reflection and offers light surface protection against corrosion
• Conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed for standard UNC 5/16-18 tapped holes in metal assemblies requiring a flush or countersunk fastening point. Suitable for use wherever ASME/ANSI B18.3 flat socket cap screws are specified.

Installation Notes

Install with a properly sized 3/16-inch hex key or socket bit driver to avoid rounding the drive recess. Ensure the countersink angle in the mating part matches the 82-degree flat head geometry before installation. De-energize or lock out any powered equipment before performing fastener work on live machinery per applicable safety protocols. Do not substitute this fastener in applications requiring metric thread standards or a different head angle.