The MIL-DTL-38999 Series I connectors, featuring up to 128 contacts, are designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors come with M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. They offer front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, all housed in high-strength aluminum shells. Plating options include light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free finishes. Suitable for military applications, these connectors ensure reliable performance with 500 mating cycles.