MIL-DTL-38999 Series I connectors feature up to 128 contacts in a sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount receptacles, and jam nut receptacles, they meet stringent military specifications. These connectors come in 9 shell sizes and 52 insert arrangements, using M39029 rear release crimp contacts in different sizes. Constructed with high-strength aluminum shells, they offer a choice of plating options such as cadmium and nickel finishes. With RoHS compliant variants, these connectors ensure reliable performance in demanding applications.