Value Collection 581893BR Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The VALUE COLLECTION 581893BR is a fully threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1-1/4-7 UNC thread size and measures 2.75 inches in length under the head. The screw is machined from alloy steel and finished with a black oxide coating, which provides moderate corrosion resistance and reduces light reflection on exposed hardware. A 7/8-inch hex drive socket is required for installation. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it a code-compliant choice for demanding fastening applications.

This cap screw is suited for heavy-duty mechanical assemblies, machinery, and industrial equipment where high clamping force and precision threading are required. The 1-1/4-7 UNC coarse thread pattern offers reliable engagement in both tapped holes and threaded inserts. It is a common choice for maintenance technicians, machinists, and millwrights working on presses, frames, gearboxes, and similar equipment requiring large-diameter fasteners.

Key Features

• 1-1/4-7 UNC thread size for coarse-thread engagement in heavy-duty assemblies
• 2.75 inches length under head — fully threaded for maximum thread engagement
• Alloy steel construction meets ASTM A574 for high tensile strength requirements
• Black oxide finish provides moderate corrosion resistance and surface hardness
• 7/8-inch hex socket drive for use with standard impact or torque drive tools
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard UNC coarse-thread hex socket cap screw for use in tapped holes or threaded assemblies requiring a 1-1/4-7 thread specification per ASME/ANSI B18.3.

Installation Notes

Installation requires a 7/8-inch hex socket driver or Allen key of adequate length and strength for the fastener size. De-energize and lock out all equipment before servicing any mechanical assembly. Apply thread lubricant or anti-seize compound as appropriate for the mating material to achieve accurate torque loading. Follow applicable equipment manufacturer specifications and industry standards for required clamping force.