MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in harsh conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with plating options including cadmium-free finishes. The jam nut mounting receptacles and bayonet coupling ensure secure connections, while M39029 rear release crimp contacts provide efficient wiring. Meeting military specification MIL-DTL-38999 I, these circular connectors are ideal for applications requiring durability and conductivity.