MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in harsh conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating such as gold and electroless nickel. They meet military specifications for durability and reliability, making them ideal for applications requiring secure electrical connections in demanding settings.