MIL-DTL-38999 Series I connectors feature up to 128 contacts sealed for harsh environments, with an operating range from -65°C to 200°C. Available in front wall mount, rear wall mount, and jam nut receptacles, these connectors offer versatility with 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Crafted from high-strength aluminum, they come in various plating finishes such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free choices available. Ideal for military and industrial applications, these connectors provide reliable performance with gold-plated removable crimp contacts, bayonet coupling, and N-keyway polarization. Meeting MIL-DTL-38999 I standards, they guarantee durability with 500 mating cycles and environmental resistance, making them suitable for use in demanding scenarios.