The 121571-1116 is a box mounting receptacle from the Cannon MIL-DTL 5015 Series I, designed for robust circular connections. It features a size 10SL aluminum alloy shell with an olive drab chromate finish over cadmium plating for durability. This connector contains three size 16S pin contacts with hard silver plating, terminated via solder cups, and is rated for 22 A. It operates reliably across a wide ambient temperature range of -55°C to +125°C and is rated for a test voltage of 1600 Vrms. With an IP65 rating, 500 hours of salt spray resistance, and a minimum of 500 mating cycles, it is suitable for demanding applications requiring secure and durable connections.