Value Collection 581051PR Hex Socket Cap Screw 2-56 Unc

Product Description

The VALUE COLLECTION 581051PR is a hex socket cap screw designed for precision fastening in mechanical assemblies, fixtures, and equipment. It features a 2-56 UNC thread size with a 1 inch length under the head and is partially threaded. The 5/64 inch hex drive accepts a standard Allen key or hex bit driver. Constructed from alloy steel with a black oxide finish, it provides moderate corrosion resistance and reduces light reflection in applications where that matters. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding industrial and precision mechanical applications. It is typically installed by machinists, maintenance technicians, and assembly professionals.

This screw is suited for use in light-duty mechanical assemblies, instrument housings, jigs, fixtures, and machine components where a low-profile socket head fastener is required. The 2-56 UNC thread is a fine-pitch, small-diameter fastener commonly used in precision equipment, electronics enclosures, and tooling applications. The partial threading allows for controlled clamping and is standard practice for socket cap screws of this length.

Key Features

• 2-56 UNC thread size for precision small-diameter fastening applications
• 1 inch length under head with partial threading for controlled clamping
• 5/64 inch hex socket drive compatible with standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides moderate corrosion resistance and low-reflectance appearance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for use in any application accepting a 2-56 UNC partially threaded socket cap screw with a 1 inch length under head.

Installation Notes

Install using a calibrated 5/64 inch hex key or hex bit driver. Ensure the mating threaded hole is clean and correctly tapped to 2-56 UNC specification before installation. De-energize or power down any equipment before servicing fasteners on live assemblies. Do not exceed the torque capacity appropriate for a 2-56 alloy steel fastener to avoid thread stripping or screw failure.