The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for secure connections. With an operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. The connectors come in aluminum shells with plating options such as electroless nickel and cadmium finishes, with RoHS certified cadmium-free options available. Using M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 12. Ideal for military and industrial use, these connectors meet stringent MIL-DTL-38999 II specifications, guaranteeing durability and performance in demanding conditions.