MIL-DTL-38999 Series I connectors are designed for harsh environments, with up to 128 contacts housed in an insert for secure connectivity. Featuring 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 environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. With 9 shell sizes and 52 insert arrangements available, they accommodate various connection needs. Constructed with high-strength aluminum shells and offering plating options like electroless nickel and cadmium finishes, they ensure durability and reliability. Suitable for applications requiring RoHS compliance, these connectors provide a robust solution for critical electrical connections in demanding settings.