The MIL-DTL-38999 Series I connectors are designed for harsh environments, offering up to 128 contacts in an environmentally sealed insert. Operating between -65°C and 200°C, they provide reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with high-strength aluminum shells, they come in a range of plating options, including electroless nickel and cadmium finishes. With RoHS certified cadmium-free options, these connectors are ideal for military and aerospace applications requiring durability and reliability.