A coaxial connector is a part used to connect the ends of two shafts so that the center lines of both shafts are on the same axis. It is often used to connect the driving shaft and and transfer the rotating motion of the driving shaft to the driven shaft. Coaxial connectors are usually divided into general coaxial connectors, dual coaxial connectors, three coaxial connectors, high voltage coaxial connectors and PCB coaxial connectors. The technical parameters of coaxial connectors are determined by electrical, mechanical and environmental characteristics.