The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for extreme operating temperatures ranging from -65 °C to 200 °C. These harsh environment 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 use M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, these connectors ensure durability and performance in demanding military and aerospace applications.
