Nut is a part that is screwed together with a bolt or screw for fastening.

The size of the nut is different, and the thread is divided into different specifications. Generally, the national standard and the German standard are represented by M (for example, M8, M16), while the American system and the British system are represented by fractions or # for specifications (such as 8#, 10#, 1/4, 3/8) Fasteners, nuts are parts that tightly connect mechanical equipment. They can only be connected through the inner thread, nuts and screws of the same specification.

Nuts mainly include hexagonal nuts, hexagonal flange nuts, hexagonal lock nuts, welding nuts, wing nuts, Eye nuts, round nuts, cap nuts, four-claw nuts,

According to relevant standards, the performance grades of carbon steel and alloy steel nuts are divided into grades 4, 6, 8, 10, and 12.

Stainless steel mainly includes SS201, SS304, SS304L, SS316, SS316L