MIL-DTL-38999 Series I connectors are specifically designed for harsh environments, featuring up to 128 contacts in an insert for robust connectivity. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in different sizes, including coax and twinax. With options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they offer versatility in installation. Constructed with high-strength aluminum shells, the connectors come in a range of plating options, from cadmium finishes to RoHS-certified alternatives, ensuring reliable performance in diverse applications.