MIL-DTL-38999 Series I connectors are engineered for high-performance in harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With a wide operating temperature range from -65 °C to 200 °C, these connectors offer reliable connectivity in extreme conditions. Available in various shell sizes and insert arrangements, they boast M39029 rear release crimp contacts in multiple sizes, including coax and twinax options. Constructed with high strength aluminum shells, they come with a selection of plating options, from cadmium finishes to RoHS certified alternatives. The connector family includes front and rear wall mount, as well as jam nut receptacles and RFI grounding plugs, offering versatility for different mounting needs. Ideal for military and aerospace applications, these connectors ensure durable performance with features like bayonet coupling, gold contact plating, and a service rating of I. With a focus on environmental resistance and conductivity, they meet stringent quality standards for demanding use cases.