MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts within a durable insert. With a wide operating temperature range of -65°C to 200°C, these circular receptacles are ideal for demanding applications. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in rugged aluminum shells with options for different platings, including cadmium-free finishes for RoHS compliance. Designed for military specifications, they ensure reliable performance with features like front wall mount, rear wall mount, and jam nut receptacles. Perfect for back panel and box mounting, these connectors provide a mating type of bayonet coupling and offer enhanced protection against environmental factors. With gold-plated contacts and a service rating of I, they guarantee conductivity and durability, making them suitable for a wide range of industrial and military applications.