The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors meet stringent military specifications. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering multiple plating options, such as electroless nickel and cadmium finishes, they provide durability and corrosion resistance. RoHS compliant options are also available. Ideal for applications requiring high reliability, these connectors are suitable for use in aerospace, defense, and other demanding industries.