Prusa Mendel i3 EiNSTeiN | Hobbed Bolt too long?

Hi,

i buyed a kit for the Prusa Mendel i3 EiNSTeiN printer at replikeo.com
I try to assemble the extruder.
I used this instructions: RepRap Instructions
This is how it currently looks like:

This is how it should look like:

My Problem: I cant screw the nylon lock nut right to the ball bearing, because there is no thread.
There is only 1 hobbed bolt at the kit, so maybe they send me a wrong piece?
What can I do to use it anyway?

Thanks,
Dramago

Hi,

You can dye the unthreaded part,
or use some washers between the nut and the bearing.

++JM