Female Screw Coupling, M22F to 1/4" Female NPT. Used anywhere high pressure connections are frequently assembled and disassembled. Easily hand tightened; ideal for connecting hoses together. Connects to all of the most common 1/4" (6.35mm) pressure washer equipment in the industry and converts M22 metric thread size to standard thread size. 300° F (148.9° C) and 5,800 PSI.