The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert with superb environmental sealing. Operating between -65 °C and 200 °C, these connectors 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 secure connections. Constructed with aluminum shells and offering plating options such as gold and electroless nickel, these connectors ensure reliable performance in demanding applications. RoHS certified finishes are also available.