Value Collection 721020PR Flat Socket Cap Screw 2-56 1 in

Product Description

The VALUE COLLECTION 721020PR is a flat socket cap screw designed for precision fastening applications where a flush or countersunk surface finish is required. This partially threaded fastener features a 2-56 UNC thread with an 82-degree flat head profile and an internal hex socket drive. Manufactured from alloy steel with a black oxide finish, the 721020PR provides corrosion resistance and reduced light reflection in close-tolerance assemblies. It measures 1 inch in overall length and weighs approximately 0.01 pounds. Installation requires a standard hex key or Allen wrench sized for #2 socket cap screws.

This screw is suited for light mechanical assemblies, instrument panels, electronics enclosures, and precision machine components where a low-profile flush-mounted fastener is needed. The black oxide finish makes it a common choice in applications requiring minimal surface glare or a uniform dark appearance. The 2-56 UNC thread size is typical in miniature and instrument-grade fastening scenarios encountered by machinists, assembly technicians, and equipment repair professionals.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• Internal hex socket drive for precise torque application in confined spaces
• 2-56 UNC thread form per ASME/ANSI B18.3 and ASTM F835
• Partially threaded shank for positive clamping in through-hole applications
• Alloy steel construction with black oxide finish for corrosion and glare resistance
• 1 inch overall length accommodates moderate-depth fastening needs

Compatibility

Designed as a standard inch-series flat socket cap screw conforming to ASME/ANSI B18.3 and ASTM F835, suitable for any application calling for a #2-56 UNC partially threaded flat socket cap screw in alloy steel.

Installation Notes

Installation is performed by machinists or assembly technicians using a properly sized hex key. The mating countersink should be machined to an 82-degree included angle to ensure correct head seating. Power down or de-energize any equipment before fastener replacement in electrical or electronic assemblies. Avoid overtightening, as the small thread size has limited torque capacity.