MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. Operating between -65 °C and 200 °C, they offer reliable connectivity. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. The high strength aluminum shells come with plating options including cadmium and nickel, meeting RoHS compliance. With a bayonet coupling and gold contact plating, these connectors ensure durability and performance in military and industrial applications.