Holo-krome 72320 Hex Socket Cap Screw 3/4-10 Unc Alloy Steel

Product Description

The HOLO-KROME 72320 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 3/4-10 UNC thread with a 3-1/2 inch length under head and is partially threaded, making it suited for applications where grip length and thread engagement must be precisely controlled. The screw is machined from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. A 5/8 inch hex drive socket is required for installation. This fastener meets ASME B18.3 and ASTM A574 standards, ensuring dimensional accuracy and mechanical performance expected in professional trade and industrial environments.

The HOLO-KROME 72320 is used wherever a strong, reliable socket head cap screw is needed in mechanical assemblies, machinery, tooling fixtures, and structural connections. Partially threaded fasteners of this type are common in applications where the unthreaded shank must pass through a clearance hole before engaging a tapped bore, providing precise clamping without thread interference in the grip area. Suitable for both OEM assembly and field maintenance work performed by millwrights, machinists, pipefitters, and maintenance technicians.

Key Features

• 3/4-10 UNC thread size for high load capacity in coarse-thread applications
• 3-1/2 inch length under head with partial threading for controlled grip and engagement
• Alloy steel construction rated to ASTM A574 for tensile strength requirements
• Black oxide finish reduces surface corrosion and minimizes glare
• 5/8 inch hex socket drive for standard socket wrench or T-handle use
• Conforms to ASME B18.3 dimensional standards for consistent fitment

Compatibility

Designed as an OEM-style replacement or standard fastener for machinery, fixtures, and structural assemblies requiring a 3/4-10 UNC hex socket cap screw with a 3-1/2 inch length under head.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician using a 5/8 inch hex socket drive tool. De-energize and lock out all equipment before fastener replacement or removal per applicable OSHA lockout/tagout procedures. Verify that the mating tapped hole thread class and material are compatible with the alloy steel screw before installation. Do not use an impact driver at full torque without confirming the assembly torque specification from the equipment manufacturer.