MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range of -65 °C to 200 °C. This harsh environment connector family includes front and rear wall mount as well as jam nut receptacles, with RFI grounding plugs available. With 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, these connectors come in multiple plating options, such as cadmium and nickel, including RoHS certified finishes. Suitable for military and industrial applications, they ensure reliable performance in demanding environments.