MIL-DTL-38999 Series II connectors, featuring up to 128 contacts in an insert, are designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. These connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles, with plugs available in straight, RFI grounding, and 90-degree cable clamp options. Compliant with military specification MIL-DTL-38999 II, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, offering reliable connectivity. Constructed with aluminum shells and available in different plating options – such as cadmium-free finishes – these connectors ensure durability and performance in demanding applications requiring environmental resistance.