How can i draw this spring?

Quick tutorial.

  1. Step 1:

    draw a rectangular shape of the given dimensions

  2. Step 2:

    Extrude as a surface

  3. Step 3:

    Use 3D sketch and sketch around the surface. Add radius on the corners.

  4. Step 4:

    Hide the surface. Sketch the profile for the sweep.

  5. Step 5:

    sweep :)