Spiral Staircase Help?

CLC

Lego makes spiral staircase steps.

Part 40243:  http://brickset.com/parts/design-40243

Clearly the pieces are supposed to thread onto some sort of upright shaft.  Does anyone know what part that is?  Also, are any other parts needed aside from the steps and shaft?

Thanks!  :)

ColoradoBricks

It is Part 40244: http://brickset.com/parts/design-40244

SprinkleOtter

And 2 x 2 plates with pins on the top and bottom are pretty necessary.

hmnicoll

You can also use the 1x1 round bricks. They work if you stack them up 

CCC

It is a good idea to look at the online instructions of any set that contains them, to see how to places the plates to keep the staircase in place.

CLC

Thank you very much everyone. 
I now know what I need for my next castle.  :)

Debarg

Or you could design your own.
I've tried this a few years back: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=143137
Anyway: have fun with your Lego!

mr_benn

As well as @Debarg 's solution, Lego has also given us the 1x4 plate with a 1x3 tile and a stud on top, then repeat ad infinitum in a nice spiral - works well in confined spaces and still looks pretty good.