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 from -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, along with RFI grounding plugs, all utilizing M39029 rear release crimp contacts. Perfect for military and industrial applications, these connectors ensure secure and durable electrical connections with their bayonet coupling and removable crimp contacts.