Holo-krome 72374 Hex Socket Cap Screw 1-8 Unc Alloy Steel

Product Description

The HOLO-KROME 72374 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and trade settings. It features a 1-8 UNC thread size, a 2-3/4 inch length under head, and a 3/4 inch hex drive. The screw is fully threaded and manufactured from alloy steel with a black oxide finish for corrosion resistance. It conforms to ASME B18.3 and ASTM A574 standards, making it suitable for demanding structural and mechanical assemblies. Electricians, millwrights, pipefitters, and general contractors commonly use this fastener when assembling equipment panels, mounting brackets, and mechanical components that require a recessed drive and reliable clamp load.

This fastener is suited for residential and commercial mechanical assemblies where a high-strength, internally driven cap screw is required. The 1-8 UNC coarse thread pattern is appropriate for most standard steel tapped holes and through-bolt applications. Its fully threaded profile provides consistent engagement across the full grip length, making it a practical choice for flanged connections, equipment bases, and structural mounting points across HVAC, plumbing, electrical, and general mechanical service environments.

Key Features

• 1-8 UNC coarse thread for compatibility with standard tapped steel holes
• 2-3/4 inch length under head provides adequate grip for medium-depth fastening applications
• 3/4 inch hex socket drive for use with standard hex keys and socket drivers
• Fully threaded body for consistent thread engagement across the entire shank
• Alloy steel construction with black oxide coating for strength and moderate corrosion resistance
• Meets ASME B18.3 and ASTM A574 standards for dimensional and mechanical compliance

Compatibility

Designed as an OEM-style replacement or direct-use fastener for applications requiring a 1-8 UNC hex socket cap screw conforming to ASME B18.3 and ASTM A574 specifications.

Installation Notes

Installation requires a 3/4 inch hex key or Allen-style socket driver rated for the torque demands of alloy steel fasteners at this thread size. Verify that the mating tapped hole or nut meets the same thread standard before installation. De-energize any electrical equipment and depressurize or shut off any fluid systems before accessing fastener locations in live service panels or pipe assemblies. Do not substitute a smaller drive size, as rounding the socket will compromise the fastener and require extraction.