MIL-DTL-38999 Series I connectors feature up to 128 contacts, sealed for environmental protection and suitable for extreme temperatures ranging from -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 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 offer multiple plating options such as cadmium and electroless nickel. Meeting military specification MIL-DTL-38999 I, these connectors are reliable for demanding applications, with RoHS compliant finishes also available.