Value Collection 40877 Button Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION 40877 is a 1/4-20 button socket cap screw designed for applications requiring a low-profile head and strong clamping force. Manufactured from alloy steel with a black oxide finish, this fastener is fully threaded along its 3/4-inch length under head. The hex socket drive accepts a 5/32-inch hex key for installation. With a hardness rating of 36-43 HRC and a Thread Fit Class 3A designation, it meets the dimensional and mechanical requirements of ANSI/ASME B18.3 and ASTM F835. It is suited for machine assembly, tooling fixtures, and general mechanical fabrication work where a flush or recessed head profile is needed.

This fastener is used in light to medium-duty mechanical assemblies across manufacturing, maintenance, and fabrication environments. The button head profile reduces protrusion and distributes load over a wider bearing surface compared to a standard socket head cap screw. The black oxide finish provides mild corrosion resistance and reduces surface reflectivity, making it appropriate for both indoor machinery and controlled-environment applications. Installers working in HVAC equipment assembly, electrical enclosures, pump mounting, and similar trade applications will find this screw a common-size replacement or assembly fastener.

Key Features

• Button head profile with low-protrusion design for flush or near-flush installations
• 5/32-inch hex socket drive for standard hex key or Allen wrench installation
• Fully threaded 3/4-inch length under head for maximum thread engagement
• Alloy steel construction with 36-43 HRC hardness for reliable clamping strength
• Black oxide finish for mild corrosion resistance and reduced surface glare
• Meets ANSI/ASME B18.3 and ASTM F835 standards for dimensional and mechanical conformance

Compatibility

Designed as a standard UNC Thread Fit Class 3A fastener compatible with any 1/4-20 threaded hole conforming to ANSI/ASME B18.3 specifications.

Installation Notes

Installation requires a 5/32-inch hex key or Allen driver. Ensure the mating threaded hole is clean and free of debris before installation. Do not exceed the torque capacity appropriate for the alloy steel grade and thread size per applicable ASME standards. Minimum order quantity is 50 pieces per order.