The MIL-DTL-38999 Series I connectors feature up to 128 contacts enclosed in an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they cater to diverse connectivity needs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come in multiple plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS certified cadmium-free finishes. Ideal for military and industrial applications, the MIL-DTL-38999 I connectors ensure reliable performance in demanding conditions.