The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering multiple plating options including electroless nickel and cadmium finishes, they ensure durability and performance. Meeting MIL-DTL-38999 II specifications, these connectors are ideal for military and industrial applications requiring rugged and reliable electrical connections.