MIL-DTL-38999 Series I connectors, featuring up to 128 contacts in an insert, are designed for harsh environments with an operating temperature range from -65 °C to 200 °C. These environmentally sealed connectors, available in various shell sizes and insert arrangements, are built for durability and reliability. With options for front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. Utilizing M39029 rear release crimp contacts, including sizes 22D, 22M, 22, 20, 16, and 8, these connectors ensure secure connections. The high strength aluminum shells come in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to various application needs. RoHS compliant finishes are also available, making them suitable for a wide range of industries. With a mating life of 500 cycles and a service rating of M for environment resistance, these connectors guarantee long-lasting performance in demanding conditions.