The nut is a piece with a central hole that features an internal thread to fit onto a bolt, either fixed or sliding, in order to fasten and secure detachable joints. In some cases, a washer is incorporated to reinforce the assembly.

The thread of the nut and the bolt must have the same geometric characteristics to achieve a proper fit. Generally, nuts are tightened with wrenches or torque wrenches, adjusted to the dimensions across their flats.

Characteristics of the Heavy Hex Nut A194 Grade 2H

The heavy hex nut 2H is manufactured under the ASTM A194 standard, grade 2H, using medium carbon steel. Available finishes include: black oxide, zinc-plated, or galvanized.
Hardness: 24 to 35 HRC.
Application: for fastening elements with ASTM A193 grade B7 bolts.