Value Collection -40889-1 Button Socket Cap Screw 5/8-11

Product Description

The VALUE COLLECTION -40889-1 is a 5/8-11 button socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling fixtures, and structural components. Machined from alloy steel with a black oxide finish, this fastener meets ANSI/ASME B18.3 and ASTM F835 standards. The low-profile button head reduces interference in tight clearance situations while the hex socket drive allows precise torque application with standard tooling. A hardness rating of 36-43 HRC provides the clamping strength required in demanding industrial and trade environments. Fully threaded along its 1-1/4 inch length under head, this screw is sold in a package quantity of 25.

This button socket cap screw is suited for applications where a flush or near-flush head profile is needed alongside high tensile strength. Common installation scenarios include machine frames, jigs, guard assemblies, and industrial equipment panels. The UNC thread form and Class 3A thread fit ensure consistent engagement in standard tapped holes. Machinists, millwrights, and maintenance technicians working in manufacturing, HVAC equipment assembly, and mechanical contracting environments will find this fastener appropriate for a range of general-purpose bolted joint requirements.

Key Features

• Alloy steel construction with 36-43 HRC hardness for high-strength fastening
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Low-profile button head minimizes protrusion in clearance-critical assemblies
• 3/8 inch hex socket drive compatible with standard hex keys and socket drivers
• Fully threaded 5/8-11 UNC Class 3A right-hand thread for consistent fit in standard tapped holes
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in standard 5/8-11 UNC tapped holes. Suitable for general industrial, mechanical, and structural fastening applications requiring a button head cap screw profile.

Installation Notes

Installation is performed using a 3/8 inch hex key or socket driver. Verify that the mating tapped hole meets 5/8-11 UNC Class 3A tolerances before installation. Ensure mating surfaces are clean and free of debris to achieve proper seating of the button head. Follow applicable ASME or project-specific torque specifications for 5/8-11 alloy steel fasteners when determining final torque values.