Holo-krome 60076 Flat Socket Cap Screw 5/16-18 X 5/8 in

Product Description

The HOLO-KROME 60076 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 3/16-inch hex socket drive, allowing installation with a standard hex key. Manufactured from alloy steel with a black oxide finish, this screw delivers hardness in the 39-44 HRC range and meets the dimensional and performance requirements of ASME B18.3 and ASTM F835. The 5/16-18 UNC thread is fully threaded along the 5/8-inch overall length, conforming to Thread Fit Class 3A for precise engagement. It is typically installed by machinists, millwrights, and maintenance technicians in equipment assembly and structural fixture work.

This screw is suited for use in machine assemblies, jigs, fixtures, and structural components where a low-profile, flush-mount fastener is required. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it appropriate for tooling and precision equipment environments. The 5/16-18 coarse thread pattern is widely used in general industrial and mechanical applications.

Key Features

• 82-degree flat head profile for flush countersunk installation
• 3/16-inch hex socket drive for standard hex key use
• Alloy steel construction with 39-44 HRC hardness rating
• Black oxide finish for mild corrosion and glare resistance
• Fully threaded 5/16-18 UNC Thread Fit Class 3A along full 5/8-inch length
• Meets ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style and aftermarket replacement flat socket cap screw for industrial machinery, tooling fixtures, and mechanical assemblies requiring a 5/16-18 UNC countersunk fastener.

Installation Notes

Installation requires a 3/16-inch hex key or hex bit driver. Countersink the mating workpiece to match the 82-degree head angle before fastening. Always de-energize and lock out equipment before performing fastener service on live machinery. Follow applicable torque guidelines from the equipment manufacturer or relevant ASME standards for alloy steel fasteners of this size class.