MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert that is environmentally sealed. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. The connectors come in high-strength aluminum shells with options for plating, including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to different application requirements. Offering RoHS certified cadmium-free finishes, these connectors are suitable for military and industrial applications where durability and performance are crucial.