MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount receptacles, as well as jam nut receptacles, they offer versatility for different applications. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, these connectors ensure reliable connections. With 9 shell sizes and 52 insert arrangements, they cater to diverse connectivity needs. Constructed from high-strength aluminum, they come in plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. Ideal for military and industrial use, these connectors provide durability and performance in demanding conditions.