MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer versatility with M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in different plating options, including gold, electroless nickel, and cadmium-free finishes. With options for front wall mount, rear wall mount, and jam nut receptacles, they provide flexibility for different mounting needs. The Series I connectors are ideal for military and aerospace applications, offering reliable performance in demanding conditions.