MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering reliable performance in temperatures ranging from -65 °C to 200 °C. These environmentally sealed connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles. With options like straight, RFI grounding, and 90-degree cable clamp plugs, they cater to diverse connectivity needs. Compliant with military specification MIL-DTL-38999 II, these circular connectors boast durability and versatility. Featuring gold-plated removable crimp contacts, they ensure excellent conductivity and mating reliability. The connectors are housed in aluminum shells with plating options such as electroless nickel and cadmium finishes, including RoHS-compliant alternatives. Suitable for demanding applications, they offer a service rating of I and ingress protection, making them ideal for use in challenging environments.