Originally Posted by
JohnDThompson
Campagnolo used to make knurled chainring bolts for pista use for this reason; they had a patent on it at the time but I suspect it has long expired:
They still do and so does Sugino >>>>
http://www.worldclasscycles.com/sugi...ring_bolts.htm
However, they only work with high end true track cranks, which have a recess in the back of the spiders (arms) to accept the nuts. I have them on my old Campy Record Pista and Sugino 75 cranks. Not only don't they turn, but they don't fall out when you remove the bolts to make a gearing change, which is very convenient at the track.