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 from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells, they come with a choice of plating options including cadmium and nickel. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and reliable connections for military and industrial applications.