MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C. Available in various mounting options such as front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in connectivity solutions. The connector family meets military specification MIL-DTL-38999 I and includes 52 insert arrangements, utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Constructed with high-strength aluminum shells, they come with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors are known for their reliability, with RoHS certified cadmium-free finishes available. Perfect for applications requiring rugged and durable electrical connections, they ensure performance even in demanding environments.