The TNC (Threaded Neill-Concelman) connector is a prevalent RF coaxial connector with a 50-ohm impedance, operating from DC up to 11GHz or even 18GHz in high-quality models. Similar to BNC but featuring a threaded connection, it ensures reliable, vibration-resistant electrical links. Widely applied in military, wireless comms, testing, and more, it balances performance with relatively high costs.