MIL-DTL-38999 Series I connectors are designed for harsh environments, offering up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatility in installation. With 9 shell sizes and 52 insert arrangements available, they accommodate various connectivity needs. Utilizing M39029 rear release crimp contacts in different sizes, including coax and twinax, these connectors ensure secure and reliable connections. Constructed with high-strength aluminum shells, they come in a range of plating options, from cadmium finishes to RoHS-certified alternatives. Suitable for military and industrial applications, MIL-DTL-38999 Series I connectors guarantee durability and performance in demanding settings.