Holo-krome 72234 Hex Socket Cap Screw 1/2-13 Unc Alloy Steel

Product Description

The HOLO-KROME 72234 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1/2-13 UNC thread size and a 2-inch length under head, with full threading along the shank. The drive is a 3/8-inch hex socket, compatible with standard Allen keys and hex drive tools. Constructed from alloy steel with a black oxide finish, the fastener offers corrosion resistance and reduced galling during installation. Licensed machinists, maintenance technicians, and assembly professionals commonly specify this type of fastener where a flush or low-profile cap-head profile is required.

This screw is suited for use in machine frames, tooling fixtures, jigs, and general mechanical assemblies where a recessed hex drive is preferred over an external hex head. The 1/2-13 UNC coarse thread pattern provides reliable engagement in standard tapped holes and threaded inserts. The black oxide coating makes it well suited for indoor industrial environments where moderate corrosion protection is acceptable. Fully threaded geometry is beneficial in shorter bolt applications where maximum thread engagement across the full grip length is needed.

Key Features

• 1/2-13 UNC coarse thread for standard tapped-hole compatibility
• 2-inch length under head, fully threaded shank
• 3/8-inch hex socket drive for Allen key or hex bit installation
• Alloy steel construction meets ASME B18.3 and ASTM A574 standards
• Black oxide finish provides moderate corrosion resistance and low reflectivity

Compatibility

Designed as a standard OEM-style replacement or direct-install hex socket cap screw for any application requiring a 1/2-13 UNC threaded fastener with a 3/8-inch hex drive and 2-inch grip length.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians using a calibrated hex key or hex socket driver sized to 3/8 inch. Verify that the receiving tapped hole meets the 1/2-13 UNC thread specification before fastener engagement. Apply thread lubricant or anti-seize compound if required by the assembly specification. Do not over-drive the fastener beyond the rated seating torque for the alloy steel grade and thread class.