The MIL-DTL-38999 Series I connectors boast up to 128 contacts within a durable insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Featuring a variety of receptacles including front wall mount, rear wall mount, and jam nut options, they ensure secure connections in demanding settings. With 9 shell sizes and 52 insert arrangements, these connectors accommodate M39029 rear release crimp contacts in various sizes, offering versatility in applications. Constructed with high-strength aluminum shells and available in different plating options such as cadmium and nickel, they guarantee reliable performance. Meeting military specification MIL-DTL-38999 I, these connectors are ideal for aerospace, defense, and industrial applications requiring rugged and dependable connectivity.