MIL-DTL-38999 Series I connectors offer a robust solution for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors, compliant with military specification MIL-DTL-38999 I, ensure reliable performance in extreme conditions, with an operating temperature range from -65 °C to 200 °C. Constructed with high-strength aluminum shells and available in various plating options such as gold, electroless nickel, and cadmium-free finishes, they provide excellent durability and conductivity. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors offer versatility for different applications. Ideal for box mounting installations, they are designed for 500 mating cycles and meet stringent environmental resistance standards.