The MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments, featuring up to 128 contacts in an environmentally sealed insert. Designed for durability, they can operate 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. With options for straight, RFI grounding, and standard plugs, they cater to diverse connectivity needs. Compliant with military specification MIL-DTL-38999 II, these circular receptacles are constructed with aluminum shells and gold-plated contacts for optimal conductivity. Offering RoHS compliant finishes, such as electroless nickel coating, they ensure both performance and environmental responsibility. Perfect for demanding applications, these connectors guarantee 500 mating cycles and reliable service in challenging conditions.