MS3106F20-19S is a MIL-DTL-5015 Series I circular connector featuring a straight plug shell style with threaded coupling mechanism. This connector includes 3 size 8 socket contacts with solder cup termination and hard silver plating, housed in a shell size 20 with contact arrangement 20-19. Key electrical specifications include a contact rating of 74 A at +20°C, contact resistance of 1 mO, and test voltage of 1600 Vrms. The connector features an aluminum alloy shell with olive drab chromate coating over cadmium plating, neoprene insulator and grommet material, and operates within an ambient temperature range of -55°C to +125°C. With IP65 protection rating, 500 hours salt spray resistance, and minimum 500 mating cycles, this connector is well-suited for demanding military, aerospace, and industrial applications requiring reliable environmental sealing and rugged performance.