Main Classifications Of Nuts

Nuts are classified based on their application and structure. Common types include hex nuts, square nuts, and round nuts, while specialized types include nuts with integrated seal-testing ports, locking bolt-and-nut assemblies, and anti-loosening rivet nuts.

In terms of material, nuts are primarily made from carbon steel, stainless steel, high-strength alloy steel, copper, and aluminum.

Regarding strength grades, high-strength nuts used in the automotive industry typically fall into classes 8.8, 9.8, 10.9, and 12.9; fasteners in these categories require heat treatment to achieve the specified tensile strength and yield-to-tensile strength ratio.

Common thread specifications for automotive nuts include M6, M8, M10, M12, M14, and M16, with the choice depending on the specific application. For load-bearing components such as suspension and chassis systems, high-strength nuts (Grade 8.8 or higher) must be used, and anti-loosening designs are essential.