Value Collection 581875BR Hex Socket Cap Screw 1-1/8-7 Unc

Product Description

The VALUE COLLECTION 581875BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1-1/8-7 UNC thread size and a 5-1/2 inch length under head, providing substantial grip for heavy-duty connections. The 7/8 inch hex drive socket interface allows torque application with a standard hex key or Allen wrench. Constructed from alloy steel with a black oxide finish coating, this fastener resists corrosion and surface wear under demanding service conditions. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming dimensional and mechanical compliance for safety-critical installations.

This socket cap screw is suited for machinery assembly, industrial equipment mounting, fixture fabrication, and general structural fastening where a recessed drive and high clamping load are required. The partial thread design concentrates clamping force and provides a smooth shank section, making it appropriate for clearance hole applications and shear-loaded joints. Machinists, millwrights, maintenance mechanics, and fabricators typically install this fastener in production and field service environments.

Key Features

• 1-1/8-7 UNC thread for high-load fastening in standard unified coarse applications
• 5-1/2 inch length under head accommodates thick material stackups
• Partial threading provides a shank section for shear resistance and precise hole alignment
• 7/8 inch hex socket drive allows high-torque installation with standard tooling
• Alloy steel construction delivers superior tensile and yield strength over carbon steel alternatives
• Black oxide finish coating reduces surface corrosion and minimizes light reflection in industrial settings
• Meets ASME/ANSI B18.3 and ASTM A574 standards for dimensional accuracy and mechanical performance

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 1-1/8-7 UNC partially threaded fastener with a 7/8 inch hex drive.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance mechanics using a calibrated torque wrench and a 7/8 inch hex key or bit. De-energize and lock out equipment before fastener installation or removal in accordance with applicable OSHA lockout/tagout procedures. Verify mating thread condition and clearance hole diameter before assembly. Do not substitute a fastener of lower grade or different thread specification in applications governed by engineered drawings or equipment manufacturer requirements.