Holo-krome 73008 Hex Socket Cap Screw 0-80 Unf 3/8 in

Product Description

The HOLO-KROME 73008 is a hex socket cap screw designed for precision fastening in tight-clearance applications. It features a 0-80 UNF thread size and a 3/8-inch length under head, with fully threaded construction along the entire shank. The drive is a 0.05-inch hex socket, requiring a matching hex key or Allen driver for installation. Built from alloy steel with a black oxide finish, the fastener offers improved corrosion resistance and reduced light reflection. This part meets ASME B18.3 and ASTM A574 standards, making it appropriate for applications where dimensional and mechanical compliance is required.

This screw is suited for precision mechanical assemblies, instrument work, and small-component fastening in applications where a fine-thread, small-diameter fastener is required. The 0-80 UNF thread is among the finest standard unified threads available, making it common in instrumentation, optics mounts, electronics enclosures, and similar precision trade or industrial work. Technicians working on HVAC control panels, electrical enclosures, or small mechanical components may encounter this fastener when servicing OEM assemblies.

Key Features

• 0-80 UNF thread - fine pitch for high-precision, low-clearance fastening
• Fully threaded shank along the entire 3/8-inch length under head
• 0.05-inch hex socket drive for compact installation access
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Conforms to ASME B18.3 dimensional standard

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 0-80 UNF fully threaded fastener with a 3/8-inch length under head.

Installation Notes

Install with a calibrated hex key or Allen driver sized to 0.05 inches to avoid rounding the socket. Do not overtighten small-diameter fasteners - fine-thread screws at this size have low torque thresholds and are susceptible to thread stripping. Ensure the mating threaded hole is clean and free of debris before installation. Follow applicable mechanical assembly codes and manufacturer torque guidance for the host assembly.