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