MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts housed in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65°C to 200°C. Available in various mounting options including front wall, rear wall, and jam nut receptacles, they offer reliable RFI grounding. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 for versatile connectivity. Constructed with high-strength aluminum shells, they come in plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. These connectors, meeting MIL-DTL-38999 I specifications, ensure durable performance in demanding applications.