MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a broad operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, as well as jam nut receptacles, these connectors are designed for harsh environments. They come in 9 shell sizes and 52 insert arrangements, using M39029 rear release crimp contacts for reliable connectivity. Constructed with high-strength aluminum shells, they offer plating options such as cadmium and nickel, with RoHS-certified cadmium-free finishes available. Ideal for military and industrial applications, these connectors ensure dependable performance in demanding settings.