Value Collection 314790BR Heavy Hex Nut 2-1/2-4 Unc

Product Description

The VALUE COLLECTION 314790BR is a heavy hex nut manufactured from A194 Grade 2H steel with a bright, uncoated finish. Designed for large-diameter bolted assemblies, this nut features a 2-1/2-4 UNC thread size with a right-hand thread direction and a 2B thread fit class per ASME B1.1. The wider, thicker profile of a heavy hex nut provides greater bearing surface and load distribution compared to a standard hex nut, making it well-suited for high-load structural and industrial fastening applications. Licensed trades and industrial maintenance professionals select this nut when joint integrity and clamping force under sustained load are critical requirements.

This heavy hex nut is used in structural bolting, pressure vessel assembly, flange connections, and heavy equipment fabrication where ASME B18.2.2 compliant fasteners are specified. Its A194 Grade 2H designation makes it a common choice for high-temperature and high-pressure bolted joint applications such as those found in industrial piping, petrochemical, and power generation systems. It is sold individually and is intended for professional installation contexts requiring verified grade and dimensional compliance.

Key Features

• A194 Grade 2H steel construction with hardness range of 95 HRB to 35 HRC for high-load applications
• 2-1/2-4 UNC right-hand thread with 2B fit class per ASME B1.1
• Heavy hex profile at 3-7/8 inches across flats and 2-29/64 inches height for increased bearing area
• Bright uncoated finish suitable for environments where post-installation coating or galvanizing will be applied
• Meets ASME B18.2.2 dimensional standards for heavy hex nuts

Compatibility

Designed as a heavy hex nut replacement or new-installation fastener for 2-1/2-4 UNC threaded rod, stud bolt, or bolt applications requiring ASME B18.2.2 compliance and A194 Grade 2H material specification.

Installation Notes

Installation is typically performed by millwrights, pipefitters, ironworkers, or mechanical contractors working on bolted flange or structural connections. Always de-energize, depressurize, and isolate the system before disassembling or reassembling any bolted joint. Use calibrated torque tooling and follow the applicable joint assembly specification for the mating fastener and gasket system. Do not mix grades or thread standards within the same bolted assembly.