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, this connector family comes in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they are available in various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Constructed with high strength aluminum shells, these connectors are RoHS compliant and suitable for applications requiring reliable performance in demanding conditions.