MIL-DTL-38999 Series I connectors offer exceptional performance in harsh environments, featuring up to 128 contacts within an environmentally sealed insert. Designed for durability, these connectors operate reliably in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, this connector family caters to diverse application needs. Constructed with high-strength aluminum shells and offering plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors ensure robust connectivity solutions. Meeting MIL-DTL-38999 I specifications, they provide a secure and efficient connection in military and industrial settings.