Holo-krome 72220 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 72220 is a hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade environments. It features a 1/2-13 UNC thread size with full threading along a 5/8-inch length under the head. The drive is a 3/8-inch internal hex socket, requiring an Allen key or hex driver for installation. Constructed from alloy steel with a black oxide finish, the 72220 delivers corrosion resistance and a clean, low-reflectance appearance. It meets ASME B18.3 and ASTM A574 standards, making it suitable for structural and mechanical fastening where a flush or recessed cap head is required.

This screw is used across a wide range of commercial and industrial applications including machinery assembly, HVAC equipment mounting, plumbing fixture bracketing, and general fabrication work. The 1/2-13 UNC coarse thread pattern is well suited for use in steel and iron assemblies where fast engagement and reliable clamping force are priorities. The black oxide coating makes it a common choice in applications where light corrosion resistance and minimal surface reflectivity are needed alongside high tensile strength.

Key Features

• 1/2-13 UNC coarse thread for reliable clamping in steel and iron assemblies
• 5/8-inch length under head, fully threaded for maximum thread engagement
• 3/8-inch internal hex drive for torque application with Allen key or hex bit driver
• Alloy steel construction meets ASTM A574 high-strength socket cap screw standard
• Black oxide finish provides light corrosion resistance and reduced surface reflectivity
• Conforms to ASME B18.3 dimensional standards for socket cap screws

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for any assembly requiring a 1/2-13 UNC fully threaded socket head cap screw conforming to ASME B18.3 and ASTM A574 specifications.

Installation Notes

Installation is performed with a 3/8-inch hex key or Allen-style bit driver rated for the torque requirements of the application. De-energize or depressurize any equipment before fastener replacement or assembly work. Follow applicable mechanical and structural codes for fastener torque and preload in your jurisdiction. Do not substitute this fastener in applications requiring stainless steel or non-ferrous hardware where corrosion or galvanic compatibility is a concern.