MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, this connector family is ideal for rugged applications. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, they ensure reliable connectivity. Constructed with high-strength aluminum shells and available in different plating options including cadmium-free finishes, these connectors meet stringent military specifications for durability. Suited for aerospace, defense, and industrial use, they provide secure and efficient electrical connections in demanding environments.