Holo-krome 73104 Hex Socket Cap Screw 3/8-24 Unf

Product Description

The HOLO-KROME 73104 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling, machinery, and industrial equipment. It features a 3/8-24 UNF thread size with a 7/8 inch length under the head and is fully threaded for maximum thread engagement. The 5/16 inch hex socket drive accepts a standard Allen or hex key wrench. Manufactured from alloy steel with a black oxide finish, this fastener delivers corrosion resistance and a clean, low-reflectance appearance. Licensed HVAC, mechanical, and industrial technicians reach for this screw when precise torque and tight tolerances are required in confined fastening locations.

This screw is suited for use in close-tolerance mechanical assemblies where a flush or recessed fastener head is required. Typical applications include machinery frames, bracket mounting, jigs and fixtures, and equipment panels where a fine thread pitch is specified for vibration resistance or precise clamping force. The 3/8-24 UNF fine thread pitch provides greater thread engagement per inch compared to coarse thread, making it a common choice in applications subject to dynamic loads or frequent adjustment.

Key Features

• 3/8-24 UNF fine thread for high vibration resistance and precise clamping
• Fully threaded shank maximizes thread engagement along the entire fastener length
• 5/16 inch hex socket drive for use with standard Allen wrenches or hex bits
• Alloy steel construction meets ASTM A574 mechanical requirements for high-strength cap screws
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 dimensional standards for socket head cap screws

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application specifying a 3/8-24 UNF fully threaded socket head cap screw with a 7/8 inch length under the head.

Installation Notes

Installation is performed using a 5/16 inch hex key or Allen drive bit. Always verify the mating tapped hole is clean and dimensionally correct for 3/8-24 UNF thread before installation. Follow applicable torque specifications from the equipment manufacturer or relevant mechanical standards. Black oxide finish is not a heavy-duty corrosion barrier - apply thread lubricant or anti-seize where moisture exposure is a concern.