MIL-DTL-38999 Series I connectors are engineered for demanding environments, boasting up to 128 contacts sealed for optimal protection. With a wide operating temperature range from -65 °C to 200 °C, these connectors deliver reliable performance in extreme conditions. 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. Constructed with high-strength aluminum shells, they offer a choice of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free finishes available. Whether for front wall mount, rear wall mount, or jam nut receptacles, these connectors comply with MIL-DTL-38999 I series standards, ensuring robust and secure electrical connections in military and industrial applications.