The HD36-24-21PN is a metal-shell circular plug from the DEUTSCH HD30 series, designed for rugged connections in the truck, bus, and off-highway industries. It features a size 24 aluminum shell with a bayonet coupling mechanism for quick connection and disconnection. The connector holds 4 size 12 and 17 size 16 contacts and is environmentally sealed with silicone grommets to an IP68 rating. Its robust construction ensures reliable performance in harsh environments with extreme temperatures, moisture, and high vibration.