MIL-DTL-38999 Series II connectors feature up to 128 contacts, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These environmentally sealed connectors come in various mounting options including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells, they offer plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Perfect for military applications, these connectors ensure reliable performance and durability in demanding conditions.