The 122372 is a RF Connector, TNC series, TNC straight Crimp Plug and gold-plated brass contacts. Body made up of brass with nickel-plated finish and Delrin insulator. The TNC connector series is a miniature, threaded weatherproof series with a constant 50ohm impedance and a frequency range of DC-11GHz. TNC connector is produced with standard polarity. This RF connector is designed for RG-142, RG-223, RG-400 and RG-55 cable.