Our Metric plug adapters are fittings commonly used in fluid power systems, particularly in Europe, where metric threads are standard. These adapters use millimeter-based measurements, with the thread size denoted by the letter "M" followed by the outside diameter (OD) in millimeters and the thread pitch. For example, an M22x1.5 plug indicates a male adapter with a 22mm outside diameter and a 1.5mm thread pitch. Metric plug adapters are designed to create secure, leak-free connections in hydraulic, pneumatic, and other fluid systems, providing a reliable seal by mating with compatible female threaded ports. Their precision and wide availability make them essential components in international fluid power applications.