MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a single insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. With various mounting options such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they provide flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. The connectors, made of aluminum, come with plating options including cadmium finishes and electroless nickel, meeting RoHS certification standards. Perfect for military and industrial applications, these connectors ensure durability and performance in demanding conditions.