BNC is a miniature version of the Type C. BNC (Bayonet Navy Connector) has a twist-snap connection. It is available in 50 Ohm and 75 Ohm impedance versions. The BNC product line is a miniature quick connect/disconnect RF connector. It features two bayonet lugs on the female connector; mating is achieved with only a quarter turn of the coupling nut. BNC connector ideally suited for cable termination for miniature to subminiature coaxial cable(RG-58,RG-316,etc.) Interface dimensions conformable to the Standards: IEC 169-8 CECC 22120 MIL-C-39012，BNC interface MIL-STD-348A/301 BS 9210 N 004