Value Collection 581659BR Hex Socket Cap Screw 5/8-11 Unc

Product Description

The VALUE COLLECTION 581659BR is a partially threaded hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. It features a 5/8-11 UNC thread size and a 9-inch length under head, making it suitable for deep-reach bolting situations where standard-length fasteners fall short. The alloy steel construction delivers the tensile strength required for demanding load-bearing connections, while the black oxide coating provides corrosion resistance and reduces surface reflectivity. A 1/2-inch hex drive accepts standard hex keys and hex bit sockets for installation and removal.

This screw is used in general industrial maintenance, machine assembly, structural fabrication, and heavy equipment repair. The 5/8-11 UNC thread is a coarse-thread standard commonly found in steel plates, tapped holes, and threaded inserts across a wide range of industrial machinery. Its partial threading allows the unthreaded shank to bear shear loads, which is an advantage in applications where lateral forces are present alongside axial clamping load. Maintenance technicians, millwrights, and fabricators regularly specify this fastener configuration for jigs, fixtures, brackets, and structural joints.

Key Features

• 5/8-11 UNC coarse-thread form for broad compatibility with standard tapped holes and nuts
• 9-inch length under head for deep-reach and thick-stack fastening applications
• Partially threaded shank to handle shear and axial load simultaneously
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish for mild corrosion resistance and reduced light reflection
• 1/2-inch hex socket drive compatible with standard hex keys and impact-rated hex bits

Compatibility

Designed as an ASME/ANSI B18.3 and ASTM A574 compliant hex socket cap screw for use in standard 5/8-11 UNC tapped holes in steel, cast iron, and compatible structural assemblies.

Installation Notes

Installation requires a 1/2-inch hex key or hex socket bit; confirm the drive tool rating is appropriate for the fastener size before applying torque. Verify the tapped hole depth accommodates the full thread engagement needed for the joint strength required by the application. Clean threads and apply thread lubricant or anti-seize compound as appropriate for the service environment and material. Follow applicable industry standards and engineering specifications for torque requirements on alloy steel fasteners of this size class.