Value Collection 40887 Button Socket Cap Screw 1/2-13

Product Description

The VALUE COLLECTION 40887 is a button socket cap screw designed for applications where a low-profile head is required alongside high clamping strength. Sized at 1/2-13 x 1-1/2 inches with a fully threaded shank, it is manufactured from alloy steel and finished with a black oxide coating for moderate corrosion resistance. The 5/16-inch hex socket drive accepts a standard Allen key or hex bit. Hardness is rated at 36-43 HRC, conforming to ASME B18.3 and ASTM F835 standards. This fastener is installed by machinists, maintenance technicians, and mechanical assemblers across industrial, OEM, and fabrication environments.

The 40887 button socket cap screw is suited for mechanical assemblies where a domed, low-profile head must sit flush or near-flush against a mating surface without protruding significantly. Typical applications include machine guards, brackets, enclosures, and structural panels where clearance is limited. The UNC thread form and Class 3A thread fit ensure consistent engagement in standard tapped holes. The black oxide finish provides a clean, non-reflective appearance and light surface protection in dry or mildly humid indoor environments.

Key Features

• Low-profile button head design for clearance-sensitive assemblies
• Alloy steel construction rated at 36-43 HRC hardness
• Black oxide coating for light corrosion resistance and non-reflective finish
• 5/16-inch hex socket drive compatible with standard Allen keys and hex bits
• Fully threaded 1/2-13 UNC shank with Class 3A thread fit and right-hand direction
• Meets ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard replacement or new-installation button socket cap screw for any application requiring a 1/2-13 UNC fully threaded fastener in an alloy steel grade conforming to ASME B18.3 and ASTM F835.

Installation Notes

Installation requires a 5/16-inch hex key or hex socket bit. Ensure the mating tapped hole is clean and free of debris before threading. Power down or de-energize any equipment before accessing fastened assemblies in live systems. Follow applicable mechanical and structural codes for fastener preload and torque procedures relevant to the specific assembly.