The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, they provide versatile options for different applications. Encased in high-strength aluminum shells with plating choices including cadmium-free finishes, they ensure reliable performance in extreme conditions. Operating between -65 °C and 200 °C, these connectors are ideal for military and aerospace applications requiring durability and environmental sealing.