MIL-DTL-38999 Series II connectors boast up to 128 contacts within an environmentally sealed insert, capable of withstanding a wide operating temperature range from -65 °C to 200 °C. These harsh environment connectors, in various mounting configurations like front and rear wall mount, jam nut, and box mount, offer versatility for demanding applications. Featuring straight and 90-degree cable clamp plugs, they come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and available in different plating options including electroless nickel and cadmium finishes, these connectors ensure durability and performance in military and industrial settings.