The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they offer versatility in installation. 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 with a choice of plating options, including cadmium-free finishes. Designed to meet military specifications, these connectors ensure reliable performance in demanding applications.