Forney 75117 Pressure Washer Accessories, Male Screw Nipple, M22M-by-3/8-Inch Male NPT Used in combinations with the screw couplers Used anywhere high pressure connections are frequently assembled and disassembled These screw nipples connect to all of the most common pressure washer equipment in the industry They connect to both male and female fitting in 1/4-Inch and 3/8-Inch sizes Converts M22 metric thread size to standard thread size