The 97-3106A-20-4S from Amphenol Industrial Operations is cable mount circular connector, plug with female sockets, 4 position, shell size-insert 20-4 and solder cup termination. This connector has threaded fastening, solid backshell and coupling nut. The 97-3106A-20-4S has copper alloy contacts with silver finish, diallyl phthalate (DAP) insert and aluminum alloy shell with olive drab chromate over cadmium finish. Operating temperature range is from -55°C to 125°C.