The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, with an impressive operating temperature range of -65 °C to 200 °C. Designed for harsh environments, these connectors come in various mounting options such as 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. With options for gold contact plating and finishes like electroless nickel, these connectors ensure optimal performance and durability. RoHS compliant versions are also offered, making them ideal for a wide range of applications requiring rugged and reliable connectivity.