MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, providing reliable performance in harsh environments. These circular connectors, featuring front wall mount, rear wall mount, and jam nut receptacles, meet stringent military specifications for durability. With a wide operating temperature range from -65 °C to 200 °C, they ensure functionality in extreme conditions. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating various applications. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. Constructed with high-strength aluminum shells and available in different plating options including cadmium-free finishes, they offer excellent corrosion resistance. Whether it's for aerospace, defense, or industrial use, MIL-DTL-38999 Series I connectors provide a reliable solution for demanding environments.