MIL-DTL-38999 Series I connectors offer robust performance in harsh environments, featuring up to 128 contacts sealed for environmental protection. With an operating temperature range from -65 °C to 200 °C, these connectors are designed for reliability in extreme conditions. Available in various configurations including front and rear wall mount, as well as jam nut receptacles, they meet stringent military specifications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they offer durability and longevity. Plating options include cadmium and nickel finishes, with RoHS-certified alternatives available. Suitable for a wide range of applications, these connectors ensure reliable performance in demanding environments.