MIL-DTL-38999 Series II connectors with up to 128 contacts offer durable, environmentally sealed performance in harsh environments, with an extensive operating temperature range from -65 °C to 200 °C. Featuring various mounting options including front wall, rear wall, jam nut, and box mount receptacles, these connectors are versatile for different applications. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts, ensuring reliable connectivity. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they meet stringent military specifications for performance and durability. With RoHS certified options available, these connectors are ideal for demanding electronic systems that require secure and high-quality connections.