Value Collection -40866-3 Button Socket Cap Screw 50 Pack

Product Description

The VALUE COLLECTION -40866-3 is a button socket cap screw designed for precision fastening applications in mechanical assemblies, tooling, and equipment fabrication. Sized at 10-32 x 5/8 inch, it features a low-profile button head and a 1/8 inch hex socket drive. Manufactured from alloy steel with a black oxide coating, this fastener meets ANSI/ASME B18.3 and ASTM F835 standards and carries a hardness rating of 36-43 HRC. It is fully threaded with a UNF thread standard and a Class 3A thread fit. This package contains 50 pieces, making it suitable for stocking or project-level use.

This button socket cap screw is commonly used in applications where a low-profile head is required, such as machine guards, fixtures, panels, and enclosures. The black oxide finish provides moderate corrosion resistance and reduces light reflection, which is useful in optical, machine tool, and industrial environments. Suitable for use by machinists, millwrights, and mechanical contractors working with close-tolerance assemblies where a standard hex cap head would interfere with adjacent components.

Key Features

• Low-profile button head reduces interference in tight clearance assemblies
• 1/8 inch hex socket drive for use with standard Allen keys or hex drivers
• Alloy steel construction with 36-43 HRC hardness for high-strength fastening
• Black oxide coating for moderate corrosion resistance and reduced glare
• Fully threaded 10-32 UNF thread with Class 3A fit for precision engagement
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards
• Packaged in a 50-piece quantity for bench stock or project use

Compatibility

Designed as a standard UNF 10-32 button socket cap screw compatible with any tapped hole or threaded insert conforming to ANSI/ASME B18.3 specifications at this thread size and pitch.

Installation Notes

Installation should be performed by a qualified machinist or mechanical technician using a calibrated 1/8 inch hex key or socket driver. Ensure the mating threaded hole is clean and free of debris before installation. Do not exceed the rated torque range for the thread size and material combination. Apply thread lubricant or thread-locking compound as required by the assembly specification.