Forney 75109 Pressure Washer Accessories, Male Screw Coupling, M22F to 3/8-Inch Male NPT Used anywhere high pressure connections are frequently assembled and disassembled Couplers are easily hand tightened and are ideal for connecting hoses together These screw couplers connect to all of the most common 1/4-Inch and 3/8-Inch pressure washer equipment in the industry Also converts M22 metric thread size to standard thread size