MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections in military and aerospace applications. Constructed with high strength aluminum shells and plated with options like electroless nickel and cadmium finishes, they provide reliable conductivity. RoHS certified cadmium-free variants are also offered, catering to diverse industrial needs.