Wrap a 3D wire around a 3d rectangle structure

[MikeWayzovski]

@DaveR

Then I used Perpendicular Face Tools (Extension Warehouse) to put a circle on the end of the helix.

Is it not a ‘spiral’

for perpendicular faces, you can also use the ‘Pie’ tool:

when placing the centre of the pie, hold left-button and drag on the line.