Question - How can we make a spring, spiral, or screw thread?
Answer -
To make a spiral or screw thread practice an AutoLISP routine such as spiral.1sp, it will produce a spiral path according to the need. Then we can use EXTRUDE command with a reference object, using the spiral as the path. Also, there is another way we can do this, by using (MDT) Mechanical Desktop or Autosurf by using augmented lines as paths.