MIL-DTL-38999 Series I connectors offer reliable connectivity with up to 128 contacts in an insert. Designed for harsh environments, they are environmentally sealed and capable of operating in temperatures ranging from -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs available. With 9 shell sizes and 52 insert arrangements, they accommodate various applications, utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells, they come in a range of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors are ideal for military and industrial use, offering RoHS certified cadmium-free finishes for environmental compliance.