MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts housed in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors meet stringent military specifications. They come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. Featuring bayonet coupling and gold-plated removable crimp contacts, these connectors guarantee secure and efficient electrical connections. Suitable for applications requiring high performance in demanding environments, they are a reliable choice for military, aerospace, and industrial use.