Value Collection 581900BR Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The VALUE COLLECTION 581900BR is a heavy-duty hex socket cap screw designed for high-strength bolted assemblies requiring precise torque application through an internal hex drive. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3 and ASTM A574 standards. The 7/8-inch hex drive accommodates a standard hex key or socket for reliable installation in tight or recessed fastener locations. With a 1-1/4-7 UNC thread and 14-inch length under head, it is suited for demanding structural and mechanical applications across industrial, heavy equipment, and fabrication environments.

This screw is used in applications where a low-profile, high-clamp-load fastener is required. The partial threading leaves a smooth shank section for shear load resistance, which is common in machinery frames, jigs, fixtures, and structural steel assemblies. Licensed millwrights, machinists, ironworkers, and maintenance technicians typically install these fasteners in industrial and manufacturing settings.

Key Features

• 1-1/4-7 UNC coarse thread for broad material compatibility and strong thread engagement
• 14-inch length under head accommodates thick stack-ups and deep through-bolt applications
• 7/8-inch internal hex drive for high-torque installation with standard hex keys or socket tooling
• Partially threaded shank provides shear load resistance in critical joints
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide coating provides mild corrosion resistance and reduces galling during installation

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 hex socket cap screw suitable for any application requiring a 1-1/4-7 UNC coarse thread fastener with a 14-inch length under head and 7/8-inch hex drive.

Installation Notes

Installation should be performed by qualified trades familiar with ASME fastener standards and proper bolting procedures. Always verify thread engagement depth and joint material specifications before torquing. Use calibrated torque tooling appropriate for the joint design; do not use impact tools without proper torque control. Clean threads and mating surfaces before installation to ensure accurate clamp load.