MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in a sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, as well as jam nut receptacles, they offer RFI grounding options. 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, including coax and twinax. Crafted from high-strength aluminum, they come in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. Suitable for military and industrial applications, these connectors ensure reliable performance in demanding conditions.