MIL-DTL-38999 Series I connectors offer rugged versatility with up to 128 contacts in an environmentally sealed insert. Operating in temperatures ranging from -65 °C to 200 °C, these connectors come in various mounting options including front wall, rear wall, and jam nut receptacles with RFI grounding plugs. Featuring 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, plating options include electroless nickel, olive drab cadmium, and black anodized aluminum, with RoHS certified cadmium-free finishes available. Suitable for harsh environments, these connectors meet MIL-DTL-38999 I specifications, ensuring reliability in demanding applications.