The MIL-DTL-38999 Series I connectors boast up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Featuring front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs, this connector family offers versatility. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they come with various plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available, ensuring compliance with environmental standards. Ideal for military and industrial applications, these connectors provide reliable performance in demanding conditions.