Value Collection 40888 Button Socket Cap Screw 1/2-13

Product Description

The VALUE COLLECTION 40888 is a button socket cap screw designed for fastening applications that require a low-profile head and high-strength clamping force. Sized at 1/2-13 with a 2-inch length under head, this screw features a hex socket drive requiring a 5/16-inch hex key. Manufactured from alloy steel with a black oxide finish, it meets ANSI/ASME B18.3 and ASTM F835 standards and carries a hardness rating of 36-43 HRC. The thread fit is Class 3A with right-hand UNC threading. Each package contains 25 screws.

This button socket cap screw is suited for machine assembly, fixture building, and panel-mount applications where a flush or reconditioned head profile is needed. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it common in industrial, mechanical, and fabrication environments. Licensed mechanics, millwrights, and maintenance technicians typically work with fasteners of this specification. The fully threaded shank provides consistent engagement throughout the length of the fastener.

Key Features

• 1/2-13 UNC thread with Class 3A fit for precise, reliable engagement
• 2-inch length under head, fully threaded for maximum thread engagement
• 5/16-inch hex socket drive for standard hex key installation
• Alloy steel construction rated 36-43 HRC for high-strength applications
• Black oxide finish for mild corrosion resistance and low-glare surface
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNC button socket cap screw compatible with tapped holes or threaded inserts sized for 1/2-13 thread in industrial and mechanical assembly applications.

Installation Notes

Installation requires a 5/16-inch hex key or socket driver. Power down or de-energize any equipment before accessing fastened assemblies. Follow applicable torque guidelines for 1/2-13 alloy steel fasteners as specified by the equipment manufacturer or relevant ASME standards. Avoid over-driving, which can damage the button head or the receiving thread.