MIL-DTL-38999 Series I connectors offer robust performance in harsh environments, featuring up to 128 contacts housed in an insert. With a wide operating temperature range from -65 °C to 200 °C, these circular receptacles are sealed for environmental protection. Available in various mounting options like front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections. The connectors, compliant with military specification MIL-DTL-38999 I, boast durable aluminum shells with options for different plating finishes like electroless nickel and cadmium. Utilizing M39029 rear release crimp contacts, they guarantee reliable conductivity, ideal for demanding applications.