Sort of washery-type things that slip over the end of an axle to hold things
on. You see them holding the wheels on childrens push-along toys. I need one
for a 12mm axle.

If I knew what to look for I might find somewhere that sells them, but you
guys probably know already.




--
Murphy's ultimate law is that if something that could go wrong doesn't, it
turns out that it would have been better if it had gone wrong.