A bolt is usually a threaded, cylindrical part with a head at one end and a sharp point at the other that mounts directly to the workpiece, while a nut is a helical part with a hole that screws into the bolt In the thread, a firm connection is formed. Bolts and nuts are often used together to connect two or more components.
Typically, passing a bolt through one part and tightening a nut onto the other will hold the two parts together. This type of connection is usually used on parts that need to be separated and disassembled because the connection can be disassembled by simply loosening the nut.
Selecting the correct bolts and nuts is very important to ensure the strength and stability of the connection. Different types and sizes of bolts and nuts can be selected according to needs. Usually, when selecting bolts and nuts, it is necessary to consider the load of the connection and the factors of the application environment to ensure that the connection has sufficient strength and that both bolts and nuts are essential parts of mechanical connections. Although they each have different shapes and functions, in actual use, they usually need to be used together to exert the greatest effect.