Holo-krome 73100 Hex Socket Cap Screw 3/8-24 Unf Alloy Steel

Product Description

The HOLO-KROME 73100 is a hex socket cap screw designed for high-strength fastening applications where a low-profile, recessed-drive fastener is required. Manufactured from alloy steel with a black oxide finish, this screw meets ASME B18.3 and ASTM A574 standards, making it suitable for demanding mechanical and structural assemblies. The 3/8-24 UNF thread provides a fine-pitch engagement for applications where precise torque control and vibration resistance are priorities. A 5/16-inch hex drive allows installation with a standard hex key or Allen-type driver. Installed by mechanical assemblers, maintenance technicians, and trade professionals working in equipment fabrication, HVAC machinery, or industrial maintenance.

This fastener is suited for use in metalworking assemblies, machine frames, equipment enclosures, and mechanical sub-assemblies where a flush or recessed fastener head is required. The fine UNF thread series is commonly specified in applications involving thin materials, precision assemblies, or where frequent removal and reinstallation is anticipated. The black oxide coating provides mild corrosion resistance in controlled indoor environments. Each order is fulfilled in multiples of 100 pieces per minimum order quantity.

Key Features

• 3/8-24 UNF fine-pitch thread for precise torque control and vibration resistance
• Fully threaded along the 5/8-inch length under head for maximum thread engagement
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• 5/16-inch hex socket drive compatible with standard hex keys and driver bits
• Conforms to ASME B18.3 dimensional standards for consistent fitment

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for mechanical assemblies specifying a 3/8-24 UNF fully threaded socket head cap screw per ASME B18.3 and ASTM A574.

Installation Notes

Installation is performed with a 5/16-inch hex key or Allen driver of appropriate length for the application. De-energize and lock out all equipment before accessing fastener locations on live machinery. Ensure mating threads are clean and free of debris before installation. Thread engagement depth and torque requirements should be determined by the equipment manufacturer or a qualified engineer based on joint design.