Holo-krome 72226 Hex Socket Cap Screw 1/2-13 Unc Alloy Steel

Product Description

The HOLO-KROME 72226 is a hex socket cap screw designed for high-strength fastening applications requiring a compact, recessed drive profile. Manufactured from alloy steel with a black oxide coating, it carries a 1/2-13 UNC thread and measures 1 inch in length under the head. The 3/8-inch hex drive accepts standard Allen keys and hex bit drivers. Fully threaded along its entire shank length, the fastener delivers consistent clamping force across the full engagement zone. It conforms to ASME B18.3 and ASTM A574, the standard specifications for high-strength socket cap screws. Mechanical, structural, and industrial maintenance professionals use this fastener where access is limited and a flush or countersunk drive is required.

This screw suits a wide range of industrial, mechanical, and maintenance applications including machine assembly, jig and fixture fabrication, tooling, and equipment mounting. The 1/2-13 UNC coarse thread is the most common unified thread series for this diameter, making it compatible with a broad selection of tapped holes and threaded inserts across general industrial environments. The black oxide finish provides mild corrosion resistance and reduces surface reflectivity in applications where that matters.

Key Features

• 1/2-13 UNC coarse thread for broad compatibility with standard tapped holes
• 1 inch length under head, fully threaded shank for maximum thread engagement
• 3/8-inch hex socket drive accepts standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide coating provides mild corrosion resistance and a low-reflectivity finish
• Conforms to ASME B18.3 dimensional standards for socket cap screws

Compatibility

Designed as a standard 1/2-13 UNC hex socket cap screw for use in any application requiring an ASME B18.3 and ASTM A574 compliant fastener with a 3/8-inch hex drive and 1-inch length under head.

Installation Notes

Installation requires a 3/8-inch hex key or Allen-style driver; use a calibrated torque wrench when specifications call for a precise clamp load. Ensure the mating tapped hole is clean and free of debris before driving the fastener. Follow applicable industry torque guidelines for 1/2-13 UNC alloy steel socket cap screws to avoid over-tightening or thread damage. De-energize and lock out any equipment before replacing fasteners in live assemblies.