M22-15mm Thread to 3/8″ Quick Connect Pressure Washer Adapter Brass 5000 PSI Set by | Jul 31, 2026Valve Parts. Oxygen Sensor. Adapter 2(Convert M22-15mm to 3/8″). Windshield Wiper Motor. Air Fuel Ratio Sensor. Universal Adaptation:Professional adapters are used for the connections of power washer gun, hose, and pump.