Value Collection 314500BR Heavy Hex Nut 1-1/2-8 A194 2H

Product Description

The VALUE COLLECTION 314500BR is a heavy hex nut designed for high-strength bolted connections in structural, pressure vessel, and industrial piping applications. Manufactured from A194 Grade 2H steel with a bright, uncoated finish, this nut meets the dimensional and mechanical requirements of ASME B18.2.2 and the thread standard ASME B1.1. The 1-1/2-8 UN thread size with a 2B fit class provides reliable engagement on heavy-duty fastener assemblies. Hardness is rated at 24 to 35 HRC, making it appropriate for high-load and high-temperature service environments. Installers, millwrights, pipefitters, and structural ironworkers commonly use this nut when assembling flanged joints, structural steel connections, and pressure-rated equipment.

This heavy hex nut is suited for use in industrial construction, pressure vessel fabrication, structural steel erection, and process piping work. The 1-1/2-8 thread size is common in large-diameter flange bolt assemblies and anchor bolt applications. The A194 Grade 2H designation is widely specified in ASME and ASTM-referenced fastener standards for bolting materials used in pressure and temperature service. This nut ships individually and is available in single-unit quantities, making it practical for replacement or low-volume maintenance work.

Key Features

• A194 Grade 2H steel construction for high-strength bolted joint service
• Hardness range of 24 to 35 HRC for consistent mechanical performance
• Right-hand, UN thread form per ASME B1.1 with 2B fit class tolerance
• Heavy hex profile per ASME B18.2.2 for increased wrench bearing surface
• Bright, uncoated finish — no additional coating or plating applied
• Width across flats of 2-3/8 inches for standard heavy hex tooling

Compatibility

Designed as a heavy hex nut replacement or new-installation fastener for 1-1/2-8 UN threaded bolt assemblies requiring A194 Grade 2H material compliance per ASME B18.2.2.

Installation Notes

Installation is typically performed by pipefitters, millwrights, or structural ironworkers using heavy hex wrenches or hydraulic torquing equipment sized for 2-3/8-inch across-flats geometry. Always verify thread engagement and cleanliness before assembly. Follow applicable code requirements, such as ASME PCC-1 for pressure boundary bolted flange joint assembly, for proper torque sequencing and lubrication practices. Do not mix with nuts of different grade or thread class in a shared bolt assembly.