MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. This connector family includes front and rear wall mount options, as well as jam nut receptacles, all offering RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high strength aluminum shells, these connectors come with plating options like cadmium and nickel, with RoHS compliant alternatives. Ideal for military and industrial use, they ensure reliable connectivity in harsh environments.