MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Constructed with high-strength aluminum shells, they come with a choice of plating options, including gold, electroless nickel, and cadmium finishes. Suitable for military applications, these connectors provide reliable connectivity with removable crimp contacts, ensuring a mating life of 500 cycles. RoHS compliant options are available, making them ideal for a range of industrial and defense systems.