MIL-DTL-38999 Series I connectors offer rugged performance 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 with RFI grounding plugs. With a wide range of shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells and available in RoHS-certified finishes, including cadmium-free options, these connectors ensure reliable connectivity in demanding applications. Operating temperature ranges from -65 °C to 200 °C, making them ideal for military and industrial use.