1-5/8-8 Heavy Hex Nuts | Grade 2H Steel | ASTM A194 (25 / Pkg.)

Heavy Hex Nuts Grade 2H Steel Plain ASTM A194 1-5/8-8 are engineered for secure, high-strength bolting in piping, structural, and machinery assemblies. Made from durable carbon steel with a plain, unplated finish, these nuts deliver reliable performance in indoor or protected environments.

Size and standard: 1-5/8-8 thread size; designed to pair with ASTM A194 Grade 2H bolts for consistent, high-strength fastening.

Key Features

• Material: Carbon steel, Grade 2H, heat-treated for strength and durability
• Finish: Plain (unplated) finish for coatings or indoor use
• Design: Heavy hex nut geometry for larger contact area and improved torque distribution
• Standards: Meets ASTM A194 requirements for high-strength bolting
• Size: 1-5/8 in diameter, 8 threads per inch (1-5/8-8)
• Applications: Suitable for piping systems, structural assemblies, and machinery where Grade 2H bolting is specified

Applications and Compatibility

These heavy hex nuts are designed to work with matching Grade 2H bolts and other components in ASTM A194 compliant assemblies. The plain finish makes them ideal for situations where an additional coating will be applied on-site, or where clean, uncoated hardware is preferred for assembly and disassembly.

Specifications

• Product Type: Heavy hex nut
• Material: Carbon steel
• Grade: 2H
• Finish: Plain
• Standards: ASTM A194
• Size: 1-5/8-8