Value Collection 36866 Flat Socket Cap Screw 5/8-11

Product Description

The VALUE COLLECTION 36866 is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head with a 3/8-inch hex socket drive, accepting a standard hex key for installation and removal. The screw is manufactured from alloy steel with a black oxide finish that provides moderate corrosion resistance and reduces light reflection. The 5/8-11 UNC thread and 1-3/4-inch overall length are fully threaded, maximizing thread engagement in blind or through-hole applications. Machinists, millwrights, and maintenance technicians use this type of fastener in machinery, fixtures, and structural assemblies where a protruding head is not acceptable.

This flat socket cap screw is suited for industrial and mechanical applications where a countersunk seat is already machined or stamped into the mating part. Typical uses include machine frames, jigs, fixtures, conveyor components, and fabricated steel assemblies. The fully threaded configuration is particularly useful in thinner material stacks where partial threading would leave unthreaded shank in the grip area. The black oxide finish is appropriate for interior or low-moisture environments. Meets ASME/ANSI B18.3 and ASTM F835 fastener standards.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 3/8-inch hex socket drive for reliable torque transfer with a hex key or bit
• Fully threaded 5/8-11 UNC for maximum thread engagement
• Alloy steel construction for high tensile strength
• Black oxide finish reduces surface glare and provides light corrosion resistance
• Meets ASME/ANSI B18.3 and ASTM F835 standards

Compatibility

Designed as a standard-dimension replacement or stock fastener for any application calling for a 5/8-11 UNC flat socket cap screw with an 82-degree head angle per ASME/ANSI B18.3.

Installation Notes

Installation is performed with a 3/8-inch hex key or hex bit driver. Ensure the mating countersink is machined to an 82-degree included angle to achieve proper head seating before applying final torque. Power down or de-energize any machinery before fastener replacement or maintenance work. Follow applicable facility safety lockout/tagout procedures when servicing equipment.