The
BNC (Bayonet Neill–Concelman) connector is a miniature quick connect/disconnect
radio frequency connector used for
coaxial cable. It features two bayonet lugs on the female connector; mating is fully achieved with a quarter turn of the coupling nut. BNC connectors are used with miniature-to-subminiature coaxial cable in radio, television, and other
radio-frequency electronic equipment, test instruments, and video signals. The BNC was commonly used with
10BASE2 computer networks. BNC connectors are made to match the
characteristic impedance of cable at either 50 ohms or 75 ohms. They are usually applied for frequencies below 4 GHz and voltages below 500 volts.