MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles including front wall, rear wall, jam nut, and box mount receptacles, they offer versatility in installation. Featuring 9 shell sizes and 52 insert arrangements with M39029 rear release crimp contacts, these connectors ensure reliable connections. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they are suitable for diverse applications. With a contact gender of male and a contact style of pin, these connectors provide efficient electrical connectivity. Meeting MIL-DTL-38999 II specifications, they are ideal for military and aerospace applications requiring rugged and durable components.