MIL-DTL-38999 Series I connectors offer durable connectivity solutions with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. With 52 insert arrangements available, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. The high-strength aluminum shells come in a range of plating options, from cadmium finishes to RoHS-certified alternatives, ensuring reliability in extreme conditions. Operating between -65 °C and 200 °C, these connectors, meeting military specification MIL-DTL-38999 I, are ideal for demanding applications that require secure and efficient electrical connections.