MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Compliant with military specification MIL-DTL-38999 I, they utilize M39029 rear release crimp contacts in various sizes. Available in 9 shell sizes and 52 insert arrangements, they come in high-strength aluminum shells with plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available. Suitable for aerospace, defense, and other demanding applications, these connectors provide reliable performance in rugged conditions.