MS3106F20-15S is a MIL-DTL-5015 Series I circular connector plug designed for rugged military and industrial applications. It features a straight shell style with threaded coupling, socket gender contacts, and shell size 20 with contact arrangement 20-15 providing 7 solder cup contacts (size 12) with hard silver plating. The connector offers a contact rating of 41 A at +20°C, contact resistance of 3 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 demanding environments requiring reliable electrical connections with high durability and environmental sealing.