The MS3122E12-10S is a box mounting receptacle from the MIL-C-26482 Series I family of miniature circular connectors. It features a size 12 aluminum alloy shell with an olive drab chromate over cadmium finish and a 12-10 insert arrangement containing 10 size-20 socket contacts. This Class E connector includes a grommet seal and utilizes crimp snap-in contacts. The connector is designed for an operating temperature range of -55°C to +125°C and features a five-keyway, three-point bayonet coupling for secure mating. It is ideal for industrial and general-purpose military applications requiring an environmentally resistant, panel-mounted interconnect solution.