MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These connectors come in various styles including front and rear wall mount, jam nut, and box mount receptacles, with options for straight and 90-degree cable clamp plugs. Utilizing M39029 rear release crimp contacts, they offer reliable connectivity in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and available in different plating options such as electroless nickel and cadmium finishes, these connectors meet stringent military specifications for durability and performance in demanding applications.