Value Collection 40886 Button Cap Screw 1/2-13 Alloy Steel 25pk

Product Description

The VALUE COLLECTION 40886 is a fully threaded button socket cap screw designed for mechanical fastening applications requiring a low-profile head and high clamping strength. Sized at 1/2-13 thread with a 1-1/4 inch length under head, it is driven by a 5/16 inch hex socket. Constructed from alloy steel with a black oxide finish, this fastener meets ANSI/ASME B18.3 and ASTM F835 standards and carries a hardness rating of 36-43 HRC. Each package contains 25 screws. Machinists, millwrights, and mechanical contractors install this type of fastener in structural assemblies, machine frames, and equipment mounting applications.

This button socket cap screw is suited for industrial and commercial mechanical assemblies where a low-profile button head is required to clear adjacent components or where flush-style fastening is preferred. The UNC thread standard makes it compatible with standard inch-series tapped holes at 1/2-13 thread pitch. Right-hand thread direction follows standard installation practice. The black oxide finish provides mild corrosion resistance in dry or lightly lubricated environments.

Key Features

• 1/2-13 UNC fully threaded, right-hand thread, Thread Fit Class 3A
• Button head profile with 5/16 inch hex socket drive for low-clearance installations
• Alloy steel construction rated at 36-43 HRC hardness for high-strength fastening
• Black oxide finish for mild corrosion resistance
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards
• Sold in a package of 25 screws

Compatibility

Designed as an OEM-style replacement or standard fitment fastener for inch-series 1/2-13 UNC tapped holes in mechanical assemblies, machine frames, and structural mounting applications.

Installation Notes

Installation is performed with a 5/16 inch hex key or socket driver. Ensure the mating tapped hole is clean and free of debris before driving the screw. De-energize or lock out any equipment before fastener service per applicable OSHA lockout/tagout procedures. Do not exceed the fastener's rated hardness range by substituting with lower-grade hardware in high-load applications.