MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts with environmental sealing and a wide operating temperature range 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 90-degree cable clamp plugs, they offer versatility in connection setups. Compliant with military specification MIL-DTL-38999 II, these circular receptacles are constructed with aluminum shells and offer multiple plating options such as gold and electroless nickel. Suitable for demanding applications, they ensure reliable performance with features like removable crimp contacts and bayonet coupling. Meeting stringent standards for conductivity and ingress protection, these connectors are ideal for use in environments requiring durability and resilience.