MIL-DTL-38999 Series I connectors offer a rugged solution for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors are environmentally sealed and operate efficiently in temperatures ranging from -65 °C to 200 °C. Designed for military specifications, they come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they are available in different plating options, including cadmium-free finishes. Ideal for applications requiring durability and reliability, these connectors ensure secure electrical connections in demanding conditions.