The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert and operating efficiently in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, ensuring reliable connectivity. Crafted from aluminum, they come with plating options including electroless nickel and cadmium finishes, meeting RoHS compliance standards. Ideal for military and industrial applications, these connectors guarantee durability and performance in demanding settings.