Value Collection 581861BR Hex Socket Cap Screw 1-1/8-7 Unc

Product Description

The VALUE COLLECTION 581861BR is a hex socket cap screw designed for high-strength bolted connections in structural, mechanical, and industrial assemblies. It features a 1-1/8-7 UNC thread and is fully threaded along its 2-inch length under head. Drive engagement is through a 7/8-inch internal hex socket, requiring an appropriately sized hex key or Allen driver. Manufactured from alloy steel with a black oxide finish, this fastener provides good corrosion resistance in moderate environments and meets ASME/ANSI B18.3 and ASTM A574 standards. The black oxide coating reduces friction during installation and maintains dimensional integrity across the thread profile.

This screw is suited for heavy-duty industrial, manufacturing, and maintenance applications where high tensile strength is required. Full threading from the bearing surface to the tip allows maximum thread engagement in through-hole or tapped applications. It is commonly installed in machine frames, fixtures, tooling plates, hydraulic manifolds, and other precision assemblies that demand consistent clamp load and dimensional reliability.

Key Features

• 1-1/8-7 UNC thread size for heavy-duty bolted connections
• 2-inch length under head, fully threaded for maximum engagement
• 7/8-inch hex socket drive for high-torque installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides moderate corrosion resistance and reduces galling
• Conforms to ASME/ANSI B18.3 socket screw dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-use fastener for industrial assemblies requiring 1-1/8-7 UNC fully threaded hex socket cap screws per ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a correctly sized 7/8-inch hex key or socket driver. Always ensure mating tapped holes are clean and free of debris before installation. Apply thread lubricant or anti-seize as appropriate for the application environment. Do not mix inch and metric fasteners in the same assembly, and verify thread engagement depth meets design requirements before applying final torque.