MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles such as front wall, rear wall, jam nut, and box mount receptacles, they offer versatility in applications. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating choices including gold, electroless nickel, and cadmium finishes, they ensure reliable performance. Meeting MIL-DTL-38999 II specifications, these connectors are ideal for military and aerospace applications requiring durability and high performance in demanding conditions.