MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts sealed for environmental protection. With a wide operating temperature range of -65 °C to 200 °C, these circular receptacles come in various configurations, including front and rear wall mount options, as well as jam nut receptacles. Compliant with military specification MIL-DTL-38999 I, they ensure reliability in demanding applications. Constructed with durable aluminum shells and available in different plating options, such as gold and electroless nickel, these connectors guarantee optimal conductivity and longevity. Suitable for box mounting with a bayonet coupling, they are ideal for aerospace, defense, and industrial settings requiring rugged and secure electrical connections.