MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments. Featuring up to 128 contacts, these circular receptacles are designed for front wall mount, rear wall mount, and jam nut installations, providing versatility in application. With a wide operating temperature range of -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Utilizing M39029 rear release crimp contacts, available in various sizes, these connectors guarantee secure and efficient connections. Constructed with durable aluminum shells and offered in multiple plating options including gold and electroless nickel, they meet stringent military specifications for conductivity and environmental resistance. Suitable for box and bulkhead mounting, they are ideal for aerospace, defense, and industrial applications requiring rugged and reliable connectivity.