Value Collection 36657 Hex Nut 5/8-11 A194 Grade 2H

Product Description

The VALUE COLLECTION 36657 is a heavy hex nut manufactured from A194 Grade 2H steel with a bright, uncoated finish. It carries a 5/8-11 UNC thread designation with a right-hand thread direction and a 2B thread fit class per ASME B1.1 and ASME B18.2.2. Hardness is rated at 24-35 HRC, making this nut suitable for high-strength bolting applications where torque retention and structural integrity are critical. It measures 1.0625 inches across the flats and 39/64 inch in height. Maintenance technicians, pipefitters, millwrights, and structural tradespeople specify this grade for demanding service conditions.

This hex nut is used in heavy industrial, structural, and pressure-flange bolting applications where A194 Grade 2H specifications are required. Common install scenarios include pipe flange assemblies, structural steel connections, pressure vessel service, and general mechanical fastening in environments with elevated load or vibration. The uncoated finish suits indoor or protected environments or applications where a specific coating will be field-applied after assembly.

Key Features

• A194 Grade 2H steel construction rated at 24-35 HRC hardness for high-strength bolting service
• 5/8-11 UNC right-hand thread, 2B fit class per ASME B1.1
• Dimensions conform to ASME B18.2.2 heavy hex nut standards
• 1.0625 inches across the flats, 39/64 inch height for standard wrench compatibility
• Bright uncoated finish — suitable for field coating or protected-environment use

Compatibility

Designed as a standard-dimension replacement or new-installation hex nut for 5/8-11 UNC threaded fastener systems conforming to ASME B18.2.2 and A194 Grade 2H material requirements.

Installation Notes

Installation is typically performed by millwrights, pipefitters, or structural ironworkers using calibrated torque wrenches appropriate for the fastener grade and joint specification. Power down or depressurize any system before servicing fasteners on live mechanical or pressure assemblies. Follow applicable code requirements, including ASME standards for pressure-boundary bolting, and verify thread engagement and nut seating before applying final torque. Do not mix A194 Grade 2H nuts with incompatible bolt grades without confirming joint design requirements.