The MIL-DTL-38999 Series I connectors offer a robust solution for harsh environments, featuring up to 128 contacts contained in an insert. Designed for durability, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, providing versatile installation options. With 9 shell sizes and 52 insert arrangements available, they accommodate various connectivity needs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections with sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Crafted from high-strength aluminum shells, they come in a range of plating options, including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. The connectors are RoHS compliant, offering cadmium-free finishes for environmentally conscious applications. Ideal for military and industrial use, the MIL-DTL-38999 Series I connectors guarantee reliable performance in demanding conditions.