MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts sealed for protection. With an operating temperature range of -65°C to 200°C, these connectors meet rigorous standards for aerospace and defense applications. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility in installation. The aluminum shells come with plating options such as gold, electroless nickel, and cadmium finishes, ensuring durability. Utilizing M39029 crimp contacts, these connectors guarantee secure connections with a mating life of 500 cycles. RoHS compliant options are also available, making them environmentally friendly choices for critical systems.