The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range from -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS-certified cadmium-free coatings. Offering front wall mount, rear wall mount, and jam nut receptacles, they provide versatility for different installation needs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and efficient connections. The environmentally sealed design and RFI grounding plugs make them ideal for military and industrial applications requiring durability and reliability.