MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors are environmentally sealed, operating efficiently in temperatures ranging from -65 °C to 200 °C. Compliant with military specifications, they offer reliable connectivity with M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells and available in multiple plating options, including RoHS-certified finishes, they ensure durability and performance in demanding applications. Suitable for both wall and jam nut mounting, these connectors provide secure and efficient electrical connections, making them ideal for military, aerospace, and industrial use.