MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65°C to 200°C. Offering front wall mount, rear wall mount, and jam nut receptacles, this connector family ensures secure connections in harsh environments. With 9 shell sizes and 52 insert arrangements available, they accommodate various contact sizes, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, these connectors come in a range of plating options, from cadmium finishes to RoHS-compliant alternatives, ensuring reliable performance in demanding conditions. Suitable for military and industrial use, these connectors provide durable and efficient connectivity solutions.