Value Collection 318450BR Heavy Hex Nut 1-3/4-5 Unc

Product Description

The VALUE COLLECTION 318450BR is a heavy hex nut designed for large-diameter fastening applications in structural, mechanical, and industrial assemblies. Manufactured from Grade 2 steel with a bright uncoated finish, this nut meets the ANSI ASME B18.2.2 fastener standard. It accepts a 1-3/4-5 UNC right-hand thread and measures 2.75 inches across the flats with a height of 1.7188 inches. The heavy hex profile provides a larger bearing surface than standard hex nuts, making it suitable for high-load connections where torque distribution across the joint is critical. Maintenance technicians, pipefitters, millwrights, and structural tradespeople commonly specify this configuration.

This heavy hex nut is used in commercial and industrial settings where large-diameter threaded fasteners are required. Typical applications include structural steel connections, pipe flange assemblies, heavy equipment mounting, and machinery foundations. The 1-3/4-5 UNC thread series is a coarse-thread designation suited for joints that are assembled and disassembled in the field or where thread engagement in lower-strength base materials is needed.

Key Features

• Heavy hex profile per ANSI ASME B18.2.2 for larger bearing surface and higher torque capacity
• 1-3/4-5 UNC right-hand thread for compatibility with standard coarse-thread fastener systems
• Grade 2 steel construction provides adequate strength for general industrial use
• Bright uncoated finish — suitable for use as-is or for post-installation coating by the installer
• 2.75-inch width across flats for use with standard heavy hex wrench and impact socket sizes

Compatibility

Designed for use with 1-3/4 inch diameter UNC coarse-thread bolts and threaded rod in heavy hex fastener assemblies conforming to ANSI ASME B18.2.2 dimensional standards.

Installation Notes

Installation is typically performed by millwrights, ironworkers, pipefitters, or mechanical contractors using appropriately rated heavy hex impact sockets or open-end wrenches. Always verify thread engagement depth and ensure mating bolt or rod thread class is compatible before torquing. Follow applicable AISC, ASME, or project specification torque requirements for the joint design. Do not use this uncoated nut in environments requiring corrosion resistance without applying an appropriate protective finish or selecting a coated alternative.