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. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, offering versatility in installation. With 9 shell sizes and 52 insert arrangements available, they accommodate various contact sizes, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in multiple plating options such as cadmium and nickel, ensuring durability. RoHS-certified finishes are also offered for environmental compliance. Designed for military specifications, these connectors provide reliable electrical connections in demanding applications.