MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert for high-density connectivity. These connectors are environmentally sealed with an operating temperature range from -65 °C to 200 °C, ensuring reliable performance in extreme conditions. Available in various mounting options such as front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. Utilizing M39029 rear release crimp contacts, these connectors come in nine shell sizes and 52 insert arrangements, accommodating different configurations. Made of high-strength aluminum with options for plating finishes like cadmium, electroless nickel, and anodized aluminum, they meet diverse industrial needs. With gold contact plating for optimal conductivity, they ensure secure connections with a mating life of 500 cycles. Suitable for military and industrial applications, these connectors provide reliable performance in demanding environments.