The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer versatile installation options. Operating efficiently at temperatures ranging from -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Made of aluminum with plating options including Electroless Nickel and Iridescent Yellow Cadmium, they ensure durability. Meeting military specification MIL-DTL-38999 II, these connectors are ideal for applications requiring high reliability in demanding environments.