The PL-259 plug is widely used as an HF cable connector;The PL-259 plug is called a "UHF" connector for historical reasons: "UHF" was redefined to be a higher range, but the plugs kept the older meaning of the name; the actual practical range is shortwave and below, or low-VHF and lower. it is a shielded form of a 4 mm banana plug.
