MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With an operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with plating options including cadmium and nickel, meeting RoHS compliance standards. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Ideal for military and aerospace applications, these connectors provide durability and conductivity in demanding settings.