Value Collection 581885BR Hex Socket Cap Screw 1-1/8-7 Unc

Product Description

The VALUE COLLECTION 581885BR is a partially threaded hex socket cap screw engineered for high-strength bolted assemblies requiring precise torque application through a recessed drive. Sized at 1-1/8-7 UNC with a 10-inch length under head, this fastener is made from alloy steel and finished with a black oxide coating that provides mild corrosion resistance and reduces light reflection on the fastener head. The 7/8-inch hex drive accepts a standard hex key or socket drive tool. It conforms to ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for structural and mechanical applications where tensile strength requirements are clearly defined.

This screw is used in heavy industrial, manufacturing, and mechanical assembly environments where large-diameter socket cap screws are required. The partially threaded shank provides a bearing surface that resists shear loads, making it appropriate for flanged connections, machinery frames, press fixtures, and similar load-bearing joints. Installers in fabrication shops, maintenance crews, and mechanical contractors working on heavy equipment are the primary users of this fastener size and grade.

Key Features

• 1-1/8-7 UNC thread form for heavy-duty bolted connections
• 10-inch length under head with partial threading for shear-load resistance
• 7/8-inch hex socket drive for high-torque application with standard tools
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides mild corrosion resistance and reduced surface reflectivity
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style and aftermarket replacement socket cap screw for heavy mechanical assemblies requiring a 1-1/8-7 UNC thread and a 10-inch length under head in alloy steel construction.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with large-diameter fastener torque procedures. Always confirm thread engagement depth and hole preparation before driving the screw. A calibrated torque wrench with the appropriate 7/8-inch hex bit is required to achieve specified clamp load without overloading the fastener. Follow the applicable equipment manufacturer specifications and relevant ASME standards for final torque values and fastener preload requirements.