Holo-krome 72260 Hex Socket Cap Screw 1/2-13 Unc Alloy Steel

Product Description

The HOLO-KROME 72260 is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial and mechanical assemblies. It features a 1/2-13 UNC thread size, a 7-inch length under head, and a 3/8-inch hex drive. Constructed from alloy steel with a black oxide finish, this screw delivers the tensile strength and corrosion resistance required in demanding service environments. It meets ASME B18.3 and ASTM A574 standards, making it a reliable choice for structural and machine assembly work where fastener performance is critical. Installation is performed using a 3/8-inch hex key or Allen-type driver.

This screw is suited for use in heavy equipment, industrial machinery, tooling fixtures, and structural mechanical assemblies. The 1/2-13 UNC coarse thread provides strong engagement in steel, cast iron, and other ferrous base materials. The partial threading and extended 7-inch length under head make it appropriate for through-bolt configurations and applications requiring a long grip length. Trades including millwrights, maintenance mechanics, and industrial assemblers commonly specify this type of fastener where high clamping force and standardized socket drive access are required.

Key Features

• 1/2-13 UNC coarse thread for strong engagement in ferrous and structural materials
• 7-inch length under head supports through-bolt and long-grip applications
• Partially threaded shank provides a smooth bearing surface in the grip zone
• 3/8-inch hex socket drive for precise torque application with standard tooling
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides mild corrosion resistance and a clean appearance

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for use in industrial machinery, structural assemblies, and mechanical fixtures requiring a 1/2-13 UNC partially threaded fastener with a 7-inch grip length.

Installation Notes

Installation should be performed by a qualified mechanic or industrial assembler using a calibrated torque wrench and the appropriate 3/8-inch hex key drive. Ensure the mating threaded hole or nut meets the ASME B18.3 and ASTM A574 requirements for this fastener grade. Clean and inspect all mating surfaces before assembly. Do not substitute a lower-grade fastener in any application that specifies ASTM A574 high-strength socket cap screws.