[sanddrag]

Originally posted by Andy Baker
We put a small bearing (1/8" id) and a #6-32 lock nut to couple to that shifter shaft. The lock nut wanted to back off after many cycles, so we drilled through the nut and threaded stainless steel "speed wire" to hold the lock nut in place.

Couldn't you have just jammed two nuts up together? Also, I'm not sure if they come in small sizes but there are these really cool nuts called crimp nuts where the top of them is smaller so it fits very tightly on the threads acting like a locknut but it is all metal, no nylon. They are used on aircraft I believe.