The MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts and environmental sealing, ideal for harsh environments. These connectors, compliant with military specification MIL-DTL-38999 II, feature various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options including cadmium and nickel, these connectors ensure reliable performance in temperatures ranging from -65 °C to 200 °C. With RoHS compliant finishes available, they are suitable for diverse applications requiring durable and high-performance circular connectors.