MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS-certified cadmium-free coatings. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, all utilizing M39029 rear release crimp contacts. Meeting military specification MIL-DTL-38999 I, these connectors are ideal for applications requiring durability and secure connections in demanding environments.