MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for extreme temperature ranges from -65 °C to 200 °C. This harsh environment connector family includes front and rear wall mount receptacles, as well as jam nut receptacles with RFI grounding plugs. With options for 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. These connectors are crafted from high-strength aluminum shells, available in plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also offered, ensuring compliance with environmental standards. Perfect for military and industrial applications, these connectors deliver reliable performance in challenging environments.