MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, with an operating temperature range of -65 °C to 200 °C. These harsh environment connectors come in various mounting options, 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. Constructed with aluminum shells and offering multiple plating options, such as gold and electroless nickel, these connectors ensure reliable performance in demanding applications. Meeting MIL-DTL-38999 II military specifications, they are ideal for use in environments requiring durability and resilience.