CX2 series gas-sealed irradiation-resistant circular connectors adopt bayonet quick-connect, which is easy and quick to operate, and can realize quick plugging and unplugging, and at the same time ensure reliable connection, anti-vibration and shock resistance. Equipped with a five-key positioning system with blind plug and anti-misplugging functions, it can ensure the correct mating of plugs and sockets to avoid damage caused by misplugging.