Hercules Dust Extractor Threading

Threading for the Hercules Dust Extractor sold at Harbor Freight. This is just the threaded end for the usage of modeling an adapter onto the end. One end of the adapter is a smooth internal wall, and the other is completely threaded up to the end of the cylinder. The hose is meant to be inserted into the smooth end, with the adapter side being on the side with the threading all the way to the face. The Connection will be an internal diameter of 44mm, with 2mm walls.