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, these connectors offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors, made with aluminum shells, come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Plating options such as cadmium and nickel ensure durability, with RoHS compliant finishes available. Ideal for military and industrial use, these connectors meet stringent quality and performance standards.