The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in an insert that provides reliable connectivity. These connectors are environmentally sealed and 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, they offer flexibility for different applications. With 52 insert arrangements available, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Made from aluminum, the connectors come with a choice of plating options, including cadmium-free finishes. Meeting MIL-DTL-38999 II military specifications, they ensure performance and durability in demanding settings.