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 of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse mounting needs. The connectors, made of aluminum, come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Plating options such as electroless nickel and cadmium finishes ensure durability, with RoHS-certified cadmium-free alternatives available. Perfect for military and industrial applications, these connectors meet stringent MIL-DTL-38999 II standards for quality and performance.