Value Collection 289114BR Heavy Hex Nut 2-4-1/2 Unc

Product Description

The VALUE COLLECTION 289114BR is a heavy hex nut designed for large-diameter threaded fastener applications in structural, mechanical, and industrial assembly work. Manufactured from Grade 2 steel with a bright, uncoated finish, this nut carries a 2-4-1/2 UNC thread size and conforms to ASME B1.1 and ASME B18.2.2 dimensional standards. The heavy hex profile provides a larger bearing surface and greater wrenching area compared to standard hex nuts, making it well suited for high-load connections. Thread fit class is 2B, indicating a standard internal thread tolerance for general-purpose fastening. Right-hand thread direction is standard. Hardness runs from 68 HRB to 32 HRC.

This heavy hex nut is used across a wide range of applications including structural steel connections, heavy equipment assembly, pipe flange bolting, and general industrial maintenance. Its large across-flats dimension of 3-1/8 inches and height of 1-3/32 inches accommodate heavy-duty bolt patterns common in commercial and industrial settings. Tradespeople in plumbing, mechanical contracting, pipefitting, and general construction will encounter this size in flange and pipe assembly work where ASME standards govern the connection.

Key Features

• Heavy hex profile with 3-1/8 inches across flats for increased bearing surface and wrenching clearance
• 2-4-1/2 UNC right-hand thread, 2B fit class per ASME B1.1
• Grade 2 steel construction, hardness range 68 HRB to 32 HRC
• Bright, uncoated finish suitable for dry or indoor environments
• Conforms to ASME B18.2.2 dimensional standard for heavy hex nuts
• Sold individually — minimum order quantity of 1

Compatibility

Designed as a standard heavy hex nut for use with 2-inch nominal diameter, 4-1/2 threads-per-inch UNC bolts and threaded rod in structural and mechanical applications meeting ASME B18.2.2 requirements.

Installation Notes

Installation is typically performed by millwrights, pipefitters, structural ironworkers, or mechanical contractors using appropriately sized open-end or box-end wrenches and impact tooling rated for large fasteners. De-energize, depressurize, or isolate any system before removing or installing fasteners on live assemblies. Follow applicable torque specifications from the bolt or flange manufacturer and relevant codes such as AISC or ASME standards for the application. Inspect threads on both the bolt and nut for damage or contamination before assembly.