7/12/14, I added a taller version again that works better with the Creator Pro build plate support. It is a thinner metal with walls for stiffness and the thinner nuts were hard to grasp.

Creator X build plate adjustment nuts. It will work for many other applications also of course.
Uploaded V2 on 6/5/14
Found the part was a little too tall and took 1mm off the height.
I also made the cutouts for grips slightly deeper.

Take old metal nuts off and put these on. Install a standard M3 locknut first. Adjust away.