The MIL-DTL-38999 Series I connectors are designed for harsh environments, offering reliable performance with up to 128 contacts in an insert. These connectors feature front wall mount, rear wall mount, and jam nut receptacles, providing versatility in installation. With a wide operating temperature range of -65°C to 200°C, they are suitable for various applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Constructed with high-strength aluminum shells and available in different plating options such as electroless nickel and cadmium finishes, they meet stringent military specifications for durability. The connectors are environmentally sealed and come in a wall-mounting flange receptacle design, ideal for demanding environments. RoHS compliant options are also available, making them suitable for a wide range of industrial applications.