MIL-DTL-38999 Series II connectors, known for their durability in harsh environments, feature up to 128 contacts housed in an environmentally sealed insert. Designed for a wide range of applications, these connectors offer reliable performance with an operating temperature spanning from -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in different sizes. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they ensure both strength and corrosion resistance. Ideal for military and industrial use, these connectors meet stringent MIL-DTL-38999 II specifications, providing a secure and efficient electrical connection in demanding environments.