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, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they come in high strength aluminum shells with options for plating including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they ensure secure connectivity. Utilizing M39029 rear release crimp contacts, these connectors are ideal for military and aerospace applications requiring durability and reliability.