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. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connectivity. Constructed with high-strength aluminum shells, they come with plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse industrial needs. RoHS compliant finishes are also available, making them suitable for a wide range of applications requiring durability and performance in demanding conditions.