MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors, meeting military specification MIL-DTL-38999 I, offer reliable performance in temperatures ranging from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells and offering a choice of plating options including electroless nickel and cadmium finishes, these connectors ensure durability and versatility. With RoHS certified cadmium-free options, they are ideal for a wide range of applications requiring secure and efficient electrical connections in demanding environments.