RS PRO Circular Connector, 4 Contacts, Panel Mount, Miniature Connector, Socket, Female, IP68

From RS PRO, these threaded sockets are serious contenders for your application. This particular model has a bigger and stronger shell. That coupled with the IP68 rating excels in harsh environments. Typical applications include outdoor security, medical devices, communications and marine equipment. When choosing a female connector, this version should really be one you consider.