MIL-DTL-38999 Series II connectors offer robust performance in harsh environments, featuring up to 128 contacts in an insert with environmental sealing. These connectors, designed for temperatures ranging from -65 °C to 200 °C, come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering multiple plating options, such as electroless nickel and cadmium finishes, these connectors ensure durability and corrosion resistance. Compliant with RoHS regulations, they are ideal for military and aerospace applications requiring secure, high-performance electrical connections.