The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts sealed within an insert. With an operating temperature range of -65 °C to 200 °C, these connectors are reliable in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and compliance. Utilizing M39029 rear release crimp contacts, they provide secure connections in sizes 22D, 22M, 22, 20, 16, and 12. The Series II connectors, with features like bayonet coupling and gold contact plating, meet stringent military specifications for performance and reliability in demanding applications.