Holo-krome 60158 Flat Socket Cap Screw 3/4-10 Alloy Steel

Product Description

The HOLO-KROME 60158 is a flat socket cap screw designed for flush or countersunk fastening applications in mechanical assemblies, tooling, and structural connections. It features an 82-degree flat head with a 1/2-inch hex socket drive, allowing installation with a standard hex key in recessed or tight-clearance locations. The fastener is manufactured from alloy steel with a black oxide finish and carries a hardness rating of 37-44 HRC, making it suitable for high-load, high-stress applications. The 3/4-10 UNC thread is fully threaded along the 1-1/2-inch body length. Installation and removal are handled with a 1/2-inch hex key. This screw conforms to ASME B18.3 and ASTM F835 standards.

This flat socket cap screw is used in industrial, manufacturing, and mechanical maintenance settings where a low-profile, flush-mount fastener is required. The countersunk head seats flush with or below the mating surface, making it appropriate for machine guards, fixtures, jigs, precision equipment, and assemblies where protruding fastener heads are not acceptable. Typically installed by machinists, millwrights, and maintenance technicians working on mechanical equipment and structural components.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 1/2-inch hex socket drive for torque application with a standard hex key
• Alloy steel construction with 37-44 HRC hardness for high-load service
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Fully threaded 3/4-10 UNC thread over entire 1-1/2-inch length
• Conforms to ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard inch-series flat socket cap screw for use in any application requiring a 3/4-10 UNC countersunk socket fastener per ASME B18.3.

Installation Notes

Installation is performed with a calibrated torque wrench and a 1/2-inch hex key or hex bit socket. Ensure the mating material is countersunk to the correct 82-degree angle before installation. Always de-energize or lock out equipment before working on any assembly. Thread fit class 3A indicates a standard close-tolerance thread - inspect threads and mating holes for damage or contamination before installation.