The MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts housed within an environmentally sealed insert. Designed for durability, these connectors have an operating temperature range from -65°C to 200°C. Available in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, they ensure versatility in installation. With nine shell sizes and 52 insert arrangements, they accommodate a wide range of applications. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, these connectors prioritize performance and compliance. RoHS certified for environmental responsibility, they are ideal for military and industrial applications requiring rugged and dependable connectivity.