MIL-DTL-38999 Series II connectors offer high performance in harsh environments, with up to 128 contacts in an environmentally sealed insert. Designed for durability, they can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile and reliable. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Crafted from aluminum, they come with plating options such as gold, electroless nickel, and cadmium finishes. Meeting stringent military specifications, these connectors ensure secure and efficient electrical connections in demanding applications.