Value Collection 581061PR Hex Socket Cap Screw 2-56 Unc

Product Description

The VALUE COLLECTION 581061PR is a hex socket cap screw designed for precision fastening applications in mechanical assemblies, tooling, and machine components. It features a 2-56 UNC thread size with a 5/32-inch length under the head and is fully threaded from head to tip. The drive is a 5/64-inch internal hex, requiring an Allen wrench or hex key for installation. Manufactured from alloy steel with a black oxide coating, this fastener provides good tensile strength and moderate corrosion resistance. It is suited for close-tolerance work where a recessed drive head and clean profile are required. Licensed machinists, maintenance technicians, and precision assembly workers are the typical installers.

This screw is appropriate for use in light mechanical assemblies, instrument panels, jig-and-fixture builds, and small-component mounting where a low-profile socket head and fine UNC threading are necessary. The 2-56 thread is a standard fine fastener size commonly found in electronics enclosures, optical equipment mounts, and precision tooling fixtures. The black oxide finish reduces surface reflectivity and provides light rust inhibition in dry or mildly humid indoor environments. This part is sold individually but requires a minimum order quantity of 100 units per order.

Key Features

• 2-56 UNC thread for precise engagement in fine-threaded tapped holes
• 5/32-inch length under head, fully threaded for maximum thread engagement
• 5/64-inch internal hex drive for use with standard Allen wrenches or hex keys
• Alloy steel construction for high tensile strength relative to fastener size
• Black oxide coating reduces light reflection and provides light corrosion inhibition
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-stock hex socket cap screw for applications requiring a 2-56 UNC fully threaded alloy steel fastener with a 5/64-inch hex drive.

Installation Notes

Installation requires a calibrated 5/64-inch hex key or Allen wrench; do not use an undersized or worn driver, as this can strip the socket recess at this fastener size. Verify that the mating tapped hole is clean, correctly sized for 2-56 UNC, and free of debris before installation. Apply thread-locking compound if vibration resistance is required, following the compound manufacturer's guidance. Always de-energize or depressurize any assembly before removing or replacing fasteners on active equipment.