MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These environmentally sealed connectors come in various configurations including front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs. Offering versatility, they are available in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Perfect for military applications, these connectors ensure reliable performance in demanding conditions.