MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering robust environmental sealing and an extensive operating temperature range of -65 °C to 200 °C. These connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells, they are offered in plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Designed for durability and reliability, these connectors meet MIL-DTL-38999 II specifications, making them ideal for demanding military and industrial applications.