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, as well as RFI grounding plugs, these connectors come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they cater to various contact sizes including 22D, 22M, 22, 20, 16, and 8. Constructed with high strength aluminum shells, they are available in 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 and industrial applications, these connectors ensure reliable connectivity in demanding settings.