Screw shape with Curve How can I get a curve on screw shape/line ? Is it possible in Blender ? I made the mesh above in the picture by screwing an hexagon (circle with 6 edges).

But this way, it is hard to work on its edges without deforming it.
So far result:



My aim is to make like metal part in picture below. So it would be easier with curve modifier.
Try adding bevel and taper to the spiral curve like this (of course smooth shading and subsurf will help).

starting with a setup like this:



you can get something like that shape using bevel, bevel object and taper to the shown curve circle: