TNC Connectors or Threaded Neill Concelman connectors are 50 Ohm RF Coaxial connectors that operate up to 11 GHz. These connectors are similar to BNC connectors, but they have a screw-type coupling mechanism that ensures uniform contact thereby minimizing reflections and attenuation. TNC connectors are widely used in antennas, avionics, defense, communications, and general industrial markets.