Hi Anis, one thing that comes up fairly often is to do screw threads with a sweep:









To do that, orient the helix path so that it is running upright pointed in the z axis direction, and use the Twist:Flat option. When you want to boolean the threads to another central body piece, try not to have the 2 pieces just barely skimming along the outside surfaces, make them punch through each other a small distance to get a clean intersection when doing the boolean.


You can also make a spring coil type shape using the same method except with a circle profile:




- Michael