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 of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. The connectors come in aluminum shells with plating options including electroless nickel and cadmium finishes. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Suitable for military and industrial use, these connectors meet stringent performance standards for conductivity and ingress protection.