Holo-krome 73108 Hex Socket Cap Screw 3/8-24 Unf Alloy Steel

Product Description

The HOLO-KROME 73108 is a hex socket cap screw designed for high-strength fastening in mechanical assemblies, industrial equipment, and trade applications. Manufactured from alloy steel with a black oxide coating, this screw provides solid corrosion resistance in typical indoor and light-exposure environments. It features a 3/8-24 UNF thread - a fine-pitch unified thread used where vibration resistance and precise load control are required. The drive is a 5/16 inch hex socket, and the length under head is 1-1/4 inches. The fastener is fully threaded along the shank. This screw meets ASME B18.3 and ASTM A574 dimensional and mechanical standards.

This cap screw is suited for applications where a flush or recessed fastener head is preferred over a hex-head bolt. Common uses include machine frames, bracket assemblies, HVAC equipment housings, pump and motor mounts, and general mechanical assemblies across residential and commercial service environments. The fine 3/8-24 UNF thread pitch makes it a reliable choice in applications requiring tight clamp load control. Installation requires a standard 5/16 inch hex key or Allen driver.

Key Features

• 3/8-24 UNF fine-thread profile for improved vibration resistance and precise torque control
• Alloy steel construction meets ASTM A574 mechanical strength requirements
• Black oxide finish provides mild corrosion protection for indoor and sheltered applications
• Fully threaded shank along the 1-1/4 inch length under head
• 5/16 inch hex socket drive for use with standard hex keys or socket drivers
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or service fastener for mechanical assemblies requiring a 3/8-24 UNF fully threaded hex socket cap screw meeting ASME B18.3 and ASTM A574 standards.

Installation Notes

Installation is performed with a 5/16 inch hex key or Allen-head driver; ensure the drive tool seats fully in the socket to avoid cam-out. De-energize or shut down any equipment before fastener removal or replacement. Follow applicable torque specifications from the equipment manufacturer for the 3/8-24 thread size. Inspect thread engagement in the receiving material to confirm adequate thread depth before applying final load.