MIL-DTL-38999 Series I connectors offer high-performance connectivity in demanding environments with up to 128 contacts sealed for protection. Operating between -65 °C and 200 °C, these connectors feature various mounting options, including front and rear wall mount and jam nut receptacles, ensuring versatile installation. With 52 insert arrangements and M39029 rear release crimp contacts, they provide reliable signal transmission in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with durable aluminum shells and available in different plating options, such as electroless nickel and cadmium-free finishes, they meet stringent military specifications for performance and reliability. Perfect for aerospace, defense, and other critical applications, these connectors guarantee secure connections in harsh operating conditions.