MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts securely housed within an insert. These connectors are fully sealed for environmental protection and can operate in temperatures ranging from -65 °C to 200 °C. With options for front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax configurations. The high-strength aluminum shells come in various plating options, such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, meeting different application needs. RoHS compliant finishes are available for environmentally conscious requirements. These connectors, compliant with MIL-DTL-38999 I specifications, provide the durability and performance required in demanding military and industrial applications.