Is there a way to add a thread feature in an assembly file? The part and assembly drawings correspond to the order of machining and assembly welding steps, so since the part is threaded later on in an assembly, I do not want to add the thread in the part file. Since the thread feature or helical curve and sweep features are not available in an assembly I am not sure how to go about this. The only option I can think of, that still won't work, but lets me add a thread, is inserting a new part and drawing it in the assembly itself, however I would not be able to cut the threads from the sub assembly. I would have to instead extrude/sweep the threads as a new part then, and would have to account for that space for the extruded threads in the sub assemblies, so it will not work either.