MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer reliable performance. These connectors come in 9 shell sizes and 52 insert arrangements, with M39029 rear release crimp contacts in different sizes. Constructed with high-strength aluminum shells, they are offered in a range of plating options including cadmium and nickel for durability. RoHS certified finishes are also available, ensuring compliance with environmental regulations. Suitable for military and industrial applications, these connectors provide secure electrical connections in demanding conditions.