Value Collection 318540BR Hex Nut 2-1/2-4 Grade 2 Steel

Product Description

The VALUE COLLECTION 318540BR is a heavy-duty hex nut threaded to a 2-1/2-4 UNC specification in Grade 2 steel with a bright, uncoated finish. It features a right-hand thread with a 2B fit class, measuring 3.875 inches across the flats and 2-29/64 inches in height. Manufactured to ASME B1.1 and ASME B18.2.2 standards, this nut is built for structural and mechanical fastening applications where a large-diameter, coarse-thread fastener is required. Installers working with heavy structural assemblies, industrial equipment, or large-diameter threaded rod will find this nut meets standard dimensional and tolerance requirements without supplemental coating or plating.

This hex nut is suited for use in general-purpose mechanical and structural applications across industrial, commercial, and trade environments. Its large 2-1/2-4 UNC thread size makes it appropriate for heavy equipment assembly, structural steel connections, large pipe flanges, and similar high-load fastening scenarios. It is typically installed by millwrights, pipefitters, ironworkers, and general contractors working with oversized threaded fasteners. The bright uncoated finish is appropriate for dry or controlled indoor environments where corrosion protection is not a primary requirement.

Key Features

• 2-1/2-4 UNC right-hand thread for coarse-thread heavy-duty fastening
• Grade 2 steel construction with hardness range of 68 HRB to 32 HRC
• Bright uncoated finish suitable for indoor and controlled-environment use
• 3.875 inches across flats and 2-29/64 inches in height for standard hex wrench fit
• Conforms to ASME B1.1 and ASME B18.2.2 dimensional and tolerance standards
• 2B thread fit class ensures reliable engagement with mating threaded components

Compatibility

Designed as a standard UNC hex nut for use with 2-1/2-4 UNC threaded bolts, studs, and threaded rod conforming to ASME B1.1 thread standards.

Installation Notes

Installation should be performed by qualified tradespeople familiar with large-diameter fastener torque requirements for the specific application and load rating. Always confirm thread engagement and fit class compatibility before assembly. Do not install on damaged or cross-threaded fasteners. Follow applicable ASME or project engineering specifications for torque and preload requirements.