MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they come in high strength aluminum shells with options for plating including gold, electroless nickel, and cadmium finishes. The Series I connectors are MIL-DTL-38999 certified and suitable for military and industrial applications requiring secure and durable connectivity.