Value Collection 581983BR Hex Socket Cap Screw 1-3/4-5 Unc

Product Description

The VALUE COLLECTION 581983BR is a hex socket cap screw designed for heavy-duty fastening applications requiring high clamping strength and precise torque delivery. This screw features a 1-3/4-5 UNC thread size with a 10-inch length under head and a 1-1/4-inch hex drive. Constructed from alloy steel with a black oxide finish, it provides corrosion resistance and a non-reflective surface suitable for demanding industrial and structural applications. The partially threaded shank allows for improved shear load performance in bolted joints. Licensed tradespeople and maintenance professionals working on heavy equipment, structural assemblies, or machinery use this fastener where large-diameter, high-strength hardware is required.

This screw is suited for industrial, commercial, and heavy-equipment applications where large-diameter UNC fasteners are specified. Its partially threaded design is commonly selected for through-bolt and structural connections where the unthreaded shank must bear shear loads. The black oxide coating makes it appropriate for applications where minimal surface corrosion resistance is needed and dimensional integrity is the priority. Machinists, millwrights, and maintenance mechanics typically install this type of fastener in steel fabrications, press frames, machinery bases, and similar assemblies.

Key Features

• 1-3/4-5 UNC thread form for compatibility with standard large-diameter UNC tapped holes
• 10-inch length under head accommodates thick structural members and deep joint stacks
• 1-1/4-inch hex socket drive for use with standard hex keys or socket tooling
• Partially threaded shank provides shear load resistance in bolted connections
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 fastener standards
• Black oxide finish reduces surface oxidation and provides a non-reflective appearance

Compatibility

Designed for use in standard 1-3/4-5 UNC tapped holes per ASME/ANSI B18.3 specifications. Confirm thread engagement depth and hole tolerance before installation.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using a calibrated torque wrench and a 1-1/4-inch hex key or socket driver. Ensure the tapped hole is clean, free of debris, and properly sized to the 1-3/4-5 UNC specification before driving the fastener. Apply appropriate thread lubricant or anti-seize compound as required by the joint specification. Do not impact-drive socket cap screws, as this can damage the drive socket or compromise thread integrity.