Holo-krome 72008 Hex Socket Cap Screw 2-56 Unc Alloy Steel

Product Description

The HOLO-KROME 72008 is a hex socket cap screw designed for precision fastening applications requiring a compact, high-strength fastener. Manufactured from alloy steel with a black oxide finish, this screw meets ASME B18.3 and ASTM A574 standards. It features a 2-56 UNC thread, a 1/2 inch length under head, and a 5/64 inch hex drive. The black oxide coating provides moderate corrosion resistance and reduces light reflection in service environments. Fully threaded along its length, it delivers consistent thread engagement from head to tip. Machinists, assemblers, and maintenance technicians working with small mechanical assemblies, precision instruments, or electronic enclosures are the primary installers of this fastener.

This screw is suited for light-duty mechanical assemblies, instrument panels, electronic housings, and small-bore fixture work where a low-profile socket drive is required. The 2-56 UNC thread is a standard fine-pitch designation common in precision machine work and instrumentation. The hex socket drive allows installation with a hex key or Allen driver in confined spaces where a slotted or Phillips driver cannot seat properly. Applications span general manufacturing, maintenance repair operations, and light industrial assembly.

Key Features

• 2-56 UNC thread for precision small-bore fastening
• Fully threaded body for maximum thread engagement along the full 1/2 inch length under head
• 5/64 inch hex socket drive for use with standard hex keys in tight spaces
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish for moderate corrosion resistance and low-glare appearance
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for tapped 2-56 UNC holes in metal, plastic, or composite assemblies requiring an alloy steel fastener with black oxide finish.

Installation Notes

Install using a 5/64 inch hex key or Allen driver; do not use an undersized key as it will round the drive socket. Verify the mating tapped hole is clean and free of debris before installation. Apply appropriate thread-locking compound if vibration resistance is required. Follow applicable torque guidelines for 2-56 alloy steel fasteners per your assembly specification.