Value Collection 40858 6-32 Button Cap Screw 50-pack

Product Description

The VALUE COLLECTION 40858 is a fully threaded button socket cap screw designed for fastening applications that require a low-profile head with high torque capacity. Sized at 6-32 with a 3/8-inch length under head, this screw features a hex socket drive accepting a 5/64-inch hex key. Manufactured from alloy steel with a black oxide finish, it meets ANSI/ASME B18.3 and ASTM F835 standards. With a hardness rating of 36-43 HRC and a Class 3A thread fit, it suits applications where consistent clamping force and dimensional precision matter. This listing covers a package of 50 screws.

These button cap screws are suited for light to medium-duty mechanical assemblies, machine components, fixtures, and fabrication work where a rounded, low-clearance head profile is preferred over a standard socket head. The UNC thread form and right-hand thread direction make them compatible with standard tapped holes. They are commonly installed by machinists, maintenance technicians, and fabricators in both production and field service settings.

Key Features

• 6-32 UNC thread with right-hand direction and Class 3A fit for consistent engagement
• 3/8-inch length under head, fully threaded
• Button head profile provides low clearance with a smooth, rounded top surface
• 5/64-inch hex socket drive for standard hex key installation
• Alloy steel construction with 36-43 HRC hardness for dependable strength
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNC replacement or stock button socket cap screw for any application requiring a 6-32 thread size and 3/8-inch length under head in alloy steel.

Installation Notes

Installation requires a 5/64-inch hex key or matching bit driver. Ensure the mating tapped hole is clean and free of debris before driving. Do not exceed the torque capacity appropriate for a 6-32 alloy steel fastener as defined by applicable assembly specifications. Follow ANSI/ASME B18.3 guidelines for proper installation and inspection of socket cap screws.