Value Collection 581670BR Hex Socket Cap Screw 5/8-11 Unc

Product Description

The VALUE COLLECTION 581670BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assembly work. It features a 5/8-11 UNC thread size and a 15-inch length under head, making it well suited for heavy-duty clamping and bolted joint applications where a long grip length is required. The screw is manufactured from alloy steel and finished with a black oxide coating, which provides mild corrosion resistance and reduces light glare on the fastener surface. Installation is performed using a 1/2-inch hex drive key or hex bit. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards.

This socket cap screw is used across a broad range of industrial and trade applications including machine assembly, fixture building, tooling, and structural bolting. The partial thread configuration provides a bearing shank for accurate hole alignment and load transfer, which is preferred in through-bolt and dowel-adjacent installations. It is commonly installed by machinists, millwrights, maintenance technicians, and mechanical contractors working with heavy equipment, jigs, or steel-to-steel assemblies requiring a flush or low-profile fastener head.

Key Features

• 5/8-11 UNC thread size for compatibility with standard coarse-thread tapped holes
• 15-inch length under head for long-reach or thick-stack fastening applications
• Partially threaded shank provides a bearing surface for accurate alignment and shear load transfer
• Alloy steel construction delivers high tensile and yield strength per ASTM A574
• Black oxide finish offers mild corrosion resistance and a low-reflectance surface
• 1/2-inch hex drive for use with standard Allen keys or hex socket bits
• Meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any 5/8-11 UNC tapped hole application requiring a partially threaded alloy steel fastener with a 1/2-inch hex drive.

Installation Notes

Installation is typically performed by machinists or mechanical technicians using a calibrated torque wrench and the appropriate 1/2-inch hex key or hex bit. Ensure mating threads are clean and free of debris before installation. Apply thread lubricant or anti-seize as required by the joint specification. Do not exceed the recommended torque value specified by the joint designer or applicable engineering standard for ASTM A574 alloy steel fasteners.