MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert and environmental sealing. Operating between -65 °C and 200 °C, they offer durability in extreme conditions. Available in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors feature aluminum shells with plating options such as gold and electroless nickel, ensuring reliable conductivity. With M39029 rear release crimp contacts in different sizes, they provide flexibility in contact arrangements. These connectors, compliant with military specification MIL-DTL-38999 II, are suitable for applications requiring rugged performance and environmental resistance.