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 configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for enhanced performance. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, accommodating a wide range of applications. Constructed with high-strength aluminum shells and offering multiple plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, they ensure durability in demanding conditions. These MIL-DTL-38999 I connectors, with RoHS certified finishes available, are ideal for military, aerospace, and industrial applications requiring reliable performance in extreme environments.