MIL-DTL-38999 Series II connectors boast up to 128 contacts within their environmentally sealed inserts, designed for extreme temperatures ranging from -65 °C to 200 °C. These harsh environment connectors offer various mounting options including front wall, rear wall, jam nut, rear box, and front box receptacles, featuring straight, RFI grounding, and standard plugs with 90-degree cable clamps. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offered in multiple plating options such as cadmium and nickel, these connectors ensure reliable performance. Suitable for military and industrial applications, they guarantee durability with RoHS compliant finishes available.