The 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, accommodating M39029 rear release crimp contacts. With options for wall mount, jam nut receptacles, and RFI grounding plugs, they offer versatility for different applications. Constructed with high-strength aluminum shells and available in multiple plating options, including RoHS-certified finishes, these connectors ensure reliable performance in demanding conditions.