Value Collection 211159PR Flat Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 211159PR is a flat socket cap screw designed for countersunk fastening applications where a flush or sub-flush head profile is required. It features an 82-degree flat head with a 3/16-inch hex socket drive, a 5/16-18 UNC thread, and a fully threaded 5/8-inch overall length. Manufactured from alloy steel with a black oxide finish, this fastener delivers strength and moderate corrosion resistance in mechanical, tooling, and industrial assemblies. It meets ASME/ANSI B18.3 and ASTM F835 standards. Installation requires a 3/16-inch hex key. This fastener is sold individually with a minimum order quantity of 100 pieces.

Flat socket cap screws of this type are commonly used in machine guarding, fixtures, jigs, and equipment panels where a smooth, recessed surface is needed. The black oxide finish reduces light reflection and provides light rust inhibition in dry or lightly oiled environments. The 5/16-18 UNC thread is a standard coarse pitch suited for general-purpose fastening into steel, aluminum, and other structural materials. Typical applications include manufacturing equipment, precision assemblies, and industrial maintenance work.

Key Features

• 82-degree flat head sits flush or below the mating surface for a clean, snag-free profile
• 3/16-inch hex socket drive for standard Allen key installation
• Fully threaded 5/8-inch overall length for maximum thread engagement in thin or shallow bores
• Alloy steel construction for high tensile and shear strength
• Black oxide finish provides light corrosion resistance and low-reflectance appearance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 5/16-18 UNC flat socket cap screw for use in countersunk holes machined to ASME/ANSI B18.3 specifications in steel, aluminum, and similar structural materials.

Installation Notes

Installation is performed with a 3/16-inch hex key or Allen-head bit driver. Ensure the mating countersink angle matches the 82-degree head geometry before installation to achieve proper seating. Power down or de-energize any equipment before servicing fastened assemblies. Do not exceed the rated torque capacity of the alloy steel fastener or the mating material, particularly when threading into softer substrates such as aluminum.