MIL-DTL-38999 Series II connectors are rugged and versatile, featuring up to 128 contacts sealed for environmentally demanding applications. Operating in temperatures ranging from -65 °C to 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options such as cadmium and nickel, these connectors ensure reliable performance in harsh environments. RoHS compliant finishes are also available, making them suitable for a wide range of applications in military and industrial settings.