MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors are made of high strength aluminum shells with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Meeting military specification MIL-DTL-38999 I, they ensure reliable connectivity in demanding applications, with RoHS certified finishes available for environmental compliance.