MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and an operational temperature range of -65 °C to 200 °C. This harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. 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 plating options such as cadmium and nickel. RoHS compliant finishes are also available. These connectors, meeting military specification MIL-DTL-38999 I, ensure reliable performance in demanding applications.