Value Collection 581763BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 581763BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Sized at 7/8-9 UNC with a 10-inch length under head, this fastener is partially threaded and driven by a 3/4-inch hex key. The alloy steel construction and black oxide finish provide strength and corrosion resistance suitable for demanding service conditions. At 9.93 pounds, this is a substantial fastener intended for heavy-duty mechanical work. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming compliance with recognized fastener specifications for strength and dimensional accuracy.

This screw is used in applications requiring a recessed drive fastener with a high-strength shoulder and clamping force. Typical installations include machinery frames, structural bolted connections, tooling fixtures, and equipment assemblies where a flush or countersunk head profile is needed alongside significant load-bearing capacity. The partially threaded shank provides a smooth bearing surface that resists shear forces at the joint interface, making it a practical choice for precision-fit applications across manufacturing and maintenance environments.

Key Features

• 7/8-9 UNC thread size for compatibility with standard inch-series tapped holes
• 10-inch length under head provides generous grip range for thick stack assemblies
• Partially threaded shank improves shear resistance at the joint interface
• 3/4-inch hex drive for use with standard hex keys or Allen-style socket tooling
• Alloy steel construction meets ASTM A574 high-strength cap screw requirements
• Black oxide finish offers mild corrosion resistance and reduces surface reflectivity

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 compliant hex socket cap screw for use in any application requiring a 7/8-9 UNC partially threaded fastener with a 10-inch length under head.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a properly sized 3/4-inch hex key or socket driver. Ensure the mating tapped hole is clean, free of debris, and cut to the correct 7/8-9 UNC thread specification before installation. Apply thread lubricant or anti-seize compound as required by the application to achieve accurate clamp load. Always de-energize and lock out equipment before removing or replacing structural fasteners.