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, these connectors come in front wall mount, rear wall mount, and jam nut receptacle options, with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections, with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Constructed with high strength aluminum shells, they offer durability and reliability in demanding applications, with RoHS certified cadmium-free finishes available. Perfect for military and industrial use, these connectors provide excellent conductivity and ingress protection, meeting stringent performance requirements.