MS3102R18-1S is a MIL-DTL-5015 Series I circular connector designed as a box mounting receptacle with threaded coupling. It features shell size 18 with contact arrangement 18-1, incorporating 10 size 16 socket contacts with solder cup termination and hard silver plating. The connector is rated for 22 A at +20°C with a contact resistance of 6 mO, test voltage of 1600 Vrms, and operates within an ambient temperature range of -55°C to +125°C. The aluminum alloy shell with olive drab chromate coating over cadmium plating provides IP65 protection and 500 hours salt spray resistance. This connector is ideal for military, aerospace, and industrial applications requiring robust, reliable interconnect solutions in harsh environments.