The MIL-DTL-38999 Series I connectors offer robust connectivity solutions in harsh environments, featuring up to 128 contacts enclosed in a sealed insert. With an impressive operating temperature range of -65°C to 200°C, these connectors are ideal for rugged applications. 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. The connectors, made of high-strength aluminum, come in different plating finishes such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. With RoHS-certified options, they meet environmental standards. The MIL-DTL-38999 I connectors, with options for front wall mount, rear wall mount, and jam nut receptacles, ensure reliable performance in demanding settings.