MIL-DTL-38999 Series I connectors boast exceptional durability with up to 128 contacts in a secure insert, offering reliable performance in harsh environments. These circular connectors, featuring various mounting options like front and rear wall mount, and jam nut receptacles, are designed for military applications. With a wide operating temperature range from -65 °C to 200 °C, they ensure consistent connectivity in extreme conditions. The connectors, available in 9 shell sizes and 52 insert arrangements, feature M39029 rear release crimp contacts for efficient installation. Constructed with high-strength aluminum shells and offering multiple plating options including cadmium and nickel finishes, they guarantee long-lasting functionality. RoHS certified options are also available, meeting environmental standards. Ideal for aerospace, defense, and industrial use, MIL-DTL-38999 Series I connectors are the top choice for demanding applications.