Holo-krome 72268 Hex Socket Cap Screw 5/8-11 Unc Alloy Steel

Product Description

The HOLO-KROME 72268 is a hex socket cap screw designed for high-strength fastening in demanding mechanical and industrial assemblies. It features a 5/8-11 UNC thread with a 1-1/2 inch length under head and is fully threaded from the head to the end. The 1/2 inch internal hex drive accepts a standard Allen wrench or hex bit driver. Constructed from alloy steel with a black oxide finish, this screw provides solid corrosion resistance in moderate environments while maintaining the tensile strength required for heavy-duty bolted connections. It meets ASME B18.3 and ASTM A574 standards.

This screw is suited for use in mechanical equipment, machinery frames, tooling fixtures, and structural assemblies where a flush or recessed fastener head is required. The fully threaded design maximizes grip length across the full shaft, making it a practical choice for through-bolt applications and thinner material stacks. Trades including millwrights, pipefitters, and industrial maintenance technicians regularly use socket cap screws of this specification when working in confined spaces where a wrench swing is not practical.

Key Features

• 5/8-11 UNC thread for high-load coarse-thread engagement
• Fully threaded shaft provides maximum thread engagement across the clamped length
• 1/2 inch hex socket drive for use with standard Allen wrenches or hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for assemblies requiring a 5/8-11 UNC hex socket cap screw with a 1-1/2 inch length under head per ASME B18.3 and ASTM A574.

Installation Notes

Installation is performed with a 1/2 inch hex key or Allen bit driver. Ensure mating threads are clean and free of debris before installation. Apply thread lubricant or anti-seize compound where required by the equipment manufacturer to achieve accurate clamp load. De-energize and lock out all equipment before removing or installing fasteners in live mechanical assemblies.