MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, these connectors come in various shell sizes and insert arrangements, utilizing M39029 rear release crimp contacts. Available in front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding options. Constructed with high strength aluminum shells, they come in plating options like cadmium and nickel. With RoHS certified finishes, these connectors ensure reliability in demanding applications.