Value Collection 581041PR Hex Socket Cap Screw 2-56 Unc

Product Description

The VALUE COLLECTION 581041PR is a hex socket cap screw designed for precision fastening in tight-clearance applications. It features a 2-56 UNC thread form and measures 5/16 inches in length under the head. The drive is a 5/64-inch hex socket, requiring an Allen key or hex bit for installation. Manufactured from alloy steel with a black oxide finish, this screw provides solid mechanical strength with moderate corrosion resistance in dry indoor environments. It is fully threaded along its entire length. Machinists, mechanical assemblers, and maintenance technicians typically install this fastener in light-duty mechanical assemblies, electronics enclosures, and precision equipment.

This screw is suited for applications requiring a fine thread pitch in small-diameter fastening situations. The 2-56 UNC designation makes it appropriate for use in instrument panels, small machine components, printed circuit board standoffs, and similar assemblies where space is limited and a low-profile cap head is preferred. The black oxide coating helps reduce light reflection and provides a degree of mild corrosion protection. These screws are sold individually but must be ordered in a minimum quantity of 100 units per order.

Key Features

• 2-56 UNC thread size for fine-thread, small-diameter fastening
• 5/16-inch length under head — fully threaded
• 5/64-inch hex socket drive for use with standard Allen keys or hex bits
• Alloy steel construction for high tensile strength relative to screw diameter
• Black oxide finish for mild corrosion resistance and reduced surface reflectivity
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed for use in standard 2-56 UNC threaded holes in mechanical assemblies, instrument housings, and precision equipment where a hex socket cap head fastener is required.

Installation Notes

Installation requires a 5/64-inch hex key or matching hex bit driver. De-energize and lock out any equipment before fastener removal or installation in powered assemblies. Avoid over-torquing small-diameter screws, as alloy steel at this size class can be susceptible to fastener damage if drive engagement is improper. Follow applicable ASME standards for torque class and preload requirements based on the specific assembly specification.