The tnc series is a commonly used coax connector the same size as bnc connectors but with a threaded coupling mechanism this connector can be used up to 11 ghz both 50 and 75 impedances are available connector styles are available for flexible conformable and semi rigid cable types versions of the tnc connector are available for mounting to printed circuit boards using both through hole soldered and through hole press fit techniques both crimp and clamp cable termination processes ar