The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. These thin-walled, restricted length connectors come in various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells with multiple plating options, they offer reliable connectivity with M39029 rear release crimp contacts. With 52 insert arrangements and sizes ranging from 22D to 12, these connectors are ideal for military and aerospace applications, ensuring durability and performance in demanding conditions.