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 from -65 °C to 200 °C. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts in multiple sizes, they provide reliable connectivity. Constructed with aluminum shells and offered in different plating options including gold, electroless nickel, and cadmium-free finishes, these connectors ensure durability and performance. Suitable for military and industrial use, they meet MIL-DTL-38999 II specifications for quality and reliability in demanding environments.