The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range from -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 different plating finishes, including RoHS certified cadmium-free options. These connectors, compliant with military specification MIL-DTL-38999 I, come in receptacle form with jam nut mounting and bayonet coupling, suitable for a wide range of applications requiring secure and durable electrical connections.