MIL-DTL-38999 Series I 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. Offering front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, they come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts in various sizes. These connectors boast high strength aluminum shells with plating options including cadmium and nickel finishes, ensuring durability and reliability. RoHS certified options are available, meeting environmental standards. Perfect for military and industrial applications requiring secure and robust electrical connections.