MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65°C to 200°C. These connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Offering versatility, they are available in 9 shell sizes and 52 insert arrangements, with M39029 rear release crimp contacts. Constructed with aluminum shells and plated with options such as gold and electroless nickel, they ensure reliable performance in harsh environments. Compliant with MIL-DTL-38999 II standards, these connectors are ideal for military, aerospace, and industrial applications requiring durability and high-temperature resistance.