A coaxial connector is a connector that is attached to an end of a coaxial cable, and is a component that connects a device to the cable. By using a coaxial connector, high-frequency signals flowing through the cable can be transmitted and received without loss. There are several shapes of coaxial connectors, which are determined by international standards. A typical shape is a BNC connector, which can be fixed by only a half turn and is easy to remove. TNC connectors and N-type connectors, which are screw-type BNC connectors, have stable connections and are suitable for use in high-frequency bands. SMA connectors are for microwaves. SMB connectors, etc. are small parts and are suitable for use in applications where insertions and removals are less frequent, such as use on a circuit board. Since the characteristics differ depending on the type, it is necessary to select a connector according to the application.