Value Collection 701301PR Button Socket Cap Screw 2-56

Product Description

The VALUE COLLECTION 701301PR is a button socket cap screw designed for precision fastening in tight, low-clearance assemblies. It features a 2-56 UNC thread, a 1/8-inch length under the head, and a hex socket drive. Manufactured from alloy steel with a black oxide coating, it delivers corrosion resistance and a clean, low-profile appearance. Hardness is rated at 36-43 HRC, and the thread fit class is 3A, meeting ANSI/ASME B18.3 and ASTM F835 standards. The fully threaded shank ensures consistent grip across the entire fastened length. This screw is installed by machinists, assembly technicians, and trades professionals working with small-gauge mechanical assemblies.

This fastener is suited for applications requiring a low-profile head with high torque-transmission capability through a hex socket drive. Common uses include precision instrument assemblies, electronic enclosures, small mechanical fixtures, and other applications where a standard hex head would interfere with mating components. The black oxide finish makes it a practical choice in environments where light corrosion inhibition and a non-reflective surface are preferred. This item is sold individually but requires a minimum order quantity of 100 pieces.

Key Features

• 2-56 UNC fully threaded alloy steel construction for consistent thread engagement
• Button head profile provides low clearance over mating surfaces
• Hex socket drive allows torque application in confined spaces
• Black oxide coating for light corrosion resistance and non-reflective finish
• Hardness of 36-43 HRC meets ASTM F835 mechanical requirements
• Thread fit class 3A per ANSI/ASME B18.3 for precise fitment

Compatibility

Designed as a standard 2-56 UNC button socket cap screw conforming to ANSI/ASME B18.3 and ASTM F835, suitable for use in any application requiring a right-hand, 3A thread-fit class fastener in this size.

Installation Notes

Install and remove using the correct hex key or hex socket driver sized for the small-gauge drive recess to avoid rounding. Ensure mating tapped holes are clean and meet the 2-56 UNC thread specification before installation. Follow applicable mechanical or equipment service procedures when fastening into precision assemblies. Do not exceed the torque rating for the assembly material, and verify the fully threaded shank engages fully within the tapped depth.