MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for rugged applications with an operating range from -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offering versatility in installation. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in various sizes, including 22D, 22M, 22, 20, 16, and 8 for coax and twinax applications. Constructed with high-strength aluminum shells, these connectors come with a range of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS compliant finishes. The MS27467 connectors, specified by MIL-DTL-38999 I, ensure reliable performance in demanding environments, making them ideal for military and industrial use.