Value Collection 581039PR Hex Socket Cap Screw 2-56 Unc

Product Description

The VALUE COLLECTION 581039PR is a hex socket cap screw designed for precision fastening in applications requiring a compact, high-strength threaded fastener. Built from alloy steel with a black oxide coating, this screw meets ASME/ANSI B18.3 and ASTM A574 standards. It features a 2-56 UNC thread, a 1/8 inch length under head, and is driven with a 5/64 inch hex key. The black oxide finish provides mild corrosion resistance and reduces light reflection in finished assemblies. Fully threaded along its entire shank length, it is suited for use in tight clearance applications where torque transfer and thread engagement are critical.

This screw is used in precision mechanical assemblies, instrumentation, electronics enclosures, and light-duty machine components where fine threads and small fastener profiles are required. The 2-56 UNC thread size is common in miniature assemblies encountered in manufacturing, maintenance, and equipment repair. Installation is typically performed by machinists, assembly technicians, or maintenance mechanics working with small-format hardware. Sold in multiples of 100 units per order.

Key Features

• 2-56 UNC fully threaded shank for reliable thread engagement in thin or shallow bosses
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide coating provides mild corrosion resistance and low-glare appearance
• 5/64 inch hex drive accepts standard hex keys and ball-end drivers
• Conforms to ASME/ANSI B18.3 dimensional standards for socket cap screws
• Minimum order quantity of 100 pieces suits production and maintenance stocking

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw in 2-56 UNC thread for use in any tapped hole or threaded insert of the same thread form and pitch.

Installation Notes

Installation is performed using a 5/64 inch hex key or ball-end driver. Ensure the mating tapped hole is clean and free of debris before threading the fastener. Power down or de-energize any equipment before accessing fastened assemblies. Do not exceed the rated torque range for the 2-56 thread size as specified in applicable ASME standards.