MIL-DTL-38999 Series I connectors, designed for rugged environments, feature up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors, compliant with military specifications, offer reliable performance in extreme conditions, with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connectivity. The high-strength aluminum shells come with options for plating, including cadmium-free finishes, ensuring durability and environmental compliance. With gold-plated contacts and bayonet coupling, these connectors provide efficient electrical connections with a service life of 500 cycles. Suitable for M, Twinax, and other applications, they guarantee conductivity and ingress protection in demanding settings.