The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 I, are sealed for environmental protection and can operate in temperatures ranging from -65°C to 200°C. Constructed with high-strength aluminum shells, they come in various plating options, including cadmium-free finishes. Utilizing M39029 rear release crimp contacts, they ensure secure connections in applications requiring reliability. With 52 insert arrangements and 9 shell sizes available, these connectors are suitable for a wide range of industrial and military uses.