MIL-DTL-38999 Series I connectors, part of the military specification, are designed for harsh environments with up to 128 contacts in an insert. These connectors are front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Offering a wide range of shell sizes and insert arrangements, they feature M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come with plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, available in RoHS certified cadmium-free finishes. With an operating temperature range from -65°C to 200°C, these connectors are built to withstand extreme conditions, making them ideal for demanding applications in military and industrial settings.