MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, suitable for harsh environments with an operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating such as cadmium and nickel. They offer reliable connectivity with M39029 rear release crimp contacts and are designed for front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Meeting military specification MIL-DTL-38999 I, they are ideal for applications requiring durability and performance in demanding conditions.