Is this what you are looking for?

http://www2.towerhobbies.com/cgi-bin...&I=LXK241&P=ML

If so, search on Tower Hobbies for "Spinner Nuts". There are a bunch from many manufacturers, and like you said they come in many sizes.

Btw, if I'm not mistaken, the brass ones are heavier than the standard ones and therefore more favorable if you are looking to add nose weight to balance a tail heavy plane. However, I'm not 100% sure about this, so someone may need to confirm it.

Hope this helps! [sm=shades_smile.gif]