MIL-DTL-38999 Series II connectors are designed for harsh environments with up to 128 contacts, offering secure connectivity in extreme conditions. Featuring environmentally sealed construction and an operating temperature range of -65 °C to 200 °C, these connectors are reliable in demanding applications. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. With 52 insert arrangements and gold-plated removable crimp contacts, they ensure efficient signal transmission. Constructed with aluminum shells and offering a range of plating options, including electroless nickel and cadmium-free finishes, these connectors prioritize durability and compliance. Suitable for military and industrial use, they provide a high level of performance with 500 mating cycles and environment-resistant features.