Hex Nut is used in conjunction with bolts and screws to connect and tighten parts. Among them, I-type carbon steel hexagonal nuts are widely used, C-grade nuts are used for machines, equipment or structures with rough surfaces and low precision requirements; A-grade and B-grade nuts are used for relatively smooth surfaces and high precision requirements. machine, equipment or structure. Type II carbon steel hexagon nuts have a thicker thickness m, and are mostly used in occasions where assembly and disassembly are often required. The thickness m of Hex Nut is relatively thin, and it is mostly used in occasions where the surface space of the connected parts is limited. Carbon steel hex nuts are fasteners with internal threads and used in conjunction with bolts, and mechanical parts with internal threads and used in conjunction with screws to transmit motion or power. According to different materials, the processing of carbon steel hexagonal nuts is divided into several types such as carbon steel, high strength, stainless steel, and plastic steel. Carbon steel hexagon nut processing is divided into general, non-standard, national standard, new national standard, American, British, and German standard according to the product characteristics corresponding to different national standard numbers. Processing process of carbon steel hexagon nut: After the steel is heated, the hole is punched and cut, and then the thread is processed, and then the nut is processed.