MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations, including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for added protection. With nine shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Constructed with high-strength aluminum shells, they come with different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, some of which are RoHS certified. Designed for military applications, these connectors provide reliable electrical connectivity in demanding conditions.