MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a single insert. With front and rear wall mount options, as well as jam nut and box mount receptacles, they provide versatile connectivity solutions. These connectors, meeting military specification MIL-DTL-38999 II, are built for durability, with an operating temperature range from -65 °C to 200 °C. Featuring thin-walled construction and various plating options including gold, electroless nickel, and cadmium finishes, they ensure reliable performance in demanding conditions. The connectors, available in 9 shell sizes and 52 insert arrangements, utilize M39029 rear release crimp contacts, making them suitable for a wide range of applications. Made of aluminum, they offer a lightweight yet rugged design, with RoHS compliant options for environmentally conscious operations. Suitable for use in environments where reliability is critical, these connectors are ideal for military, aerospace, and industrial applications.