MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in a sealed insert with an operating temperature range of -65 °C to 200 °C. These connectors come in various styles including front wall mount, rear wall mount, jam nut, and box mount receptacles, with options for straight, RFI grounding, and 90-degree cable clamp plugs. Compliant with military specification MIL-DTL-38999 II, they utilize M39029 rear release crimp contacts and are available in aluminum shells with plating options such as cadmium and nickel. Offering reliable performance, these connectors are ideal for applications requiring durability and environmental resilience.