MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, these connectors offer versatile connectivity options. Operating in temperatures ranging from -65 °C to 200 °C, they are environmentally sealed for reliable performance. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come in plating options such as cadmium and nickel for durability. Ideal for military and industrial applications, these connectors ensure secure and efficient electrical connections in demanding conditions.