An air adapter, also known as an air fitting or air connector, is a device used to connect different types of pneumatic components or tools together. It serves as an interface that enables the seamless integration of various air tools, hoses, or accessories in a pneumatic system.

Air adapters come in various shapes, sizes, and configurations, depending on the specific connection requirements. They can have different thread sizes, types (such as NPT, BSP, or metric), and designs to accommodate the diverse range of pneumatic components available.