MIL-DTL-38999 Series II connectors feature up to 128 contacts and are designed for harsh environments, with an operating temperature range of -65 °C to 200 °C. These connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles, with options for straight, RFI grounding, and standard plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells, they offer plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available. The MIL-DTL-38999 II connectors are ideal for applications requiring durability and reliability in demanding environments.