MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65°C to 200°C, these connectors offer reliability in extreme conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts, including coax and twinax options. The high-strength aluminum shells come in a range of plating options, from cadmium to electroless nickel, ensuring durability and performance. These connectors, compliant with military specification MIL-DTL-38999 I, are ideal for applications requiring secure and efficient electrical connections in demanding settings.