The 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 plating including cadmium-free finishes. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs for added functionality. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections, making them ideal for military and aerospace applications.