Value Collection 581671BR Hex Socket Cap Screw 5/8-11 Unc

Product Description

The VALUE COLLECTION 581671BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assembly work. It carries a 5/8-11 UNC thread and a 16-inch length under head, making it well suited for long-reach clamping situations where standard-length fasteners fall short. The alloy steel construction with a black oxide finish delivers solid corrosion resistance and maintains dimensional integrity under load. Installation is driven by a 1/2-inch hex socket. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, confirming its suitability for demanding mechanical applications. Machinists, millwrights, and industrial maintenance technicians are the typical installers.

This screw is used wherever a heavy-duty, socket-driven cap screw is needed in fabrication, machine assembly, jig and fixture construction, or maintenance repair operations. The partial threading allows the unthreaded shank to act as a precision locating body in close-tolerance bores. The long 16-inch under-head length accommodates thick workpieces or stacked assemblies that require extended fastener reach. It is sold individually.

Key Features

• 5/8-11 UNC thread for compatibility with standard coarse-thread tapped holes
• 16-inch length under head for long-reach and thick-stack fastening applications
• Partially threaded shank provides a smooth locating surface in precision bores
• Alloy steel construction for high tensile strength under heavy load
• Black oxide finish provides moderate corrosion resistance and low light reflectance
• 1/2-inch hex drive for use with standard hex keys and socket drive tools
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style hex socket cap screw for use in standard 5/8-11 UNC tapped holes in industrial machinery, fabricated structures, and mechanical assemblies requiring a long partially threaded alloy steel fastener.

Installation Notes

Installation is typically performed by machinists, millwrights, or industrial maintenance technicians using a 1/2-inch hex key or socket driver. Ensure the mating tapped hole is clean and free of debris before threading the fastener. Apply appropriate thread lubricant or anti-seize compound as required by the application to achieve accurate clamping force. Follow torque specifications defined by the assembly engineer or equipment OEM for the fastener grade and material being joined.