MIL-DTL-38999 Series II connectors offer high-performance connectivity for harsh environments, featuring up to 128 contacts in an insert. These circular connectors are environmentally sealed, with a wide operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they provide versatile installation options. Constructed with aluminum shells and offering multiple plating choices, such as electroless nickel and cadmium finishes, these connectors ensure durability and reliability. Utilizing M39029 rear release crimp contacts, they guarantee secure connections in applications requiring up to 500 mating cycles. Ideal for military and industrial use, these connectors meet MIL-DTL-38999 II specifications, delivering exceptional performance in demanding environments.