Not what I meant Mark, but I get it now.
I always drill and wire the head of the bolt rather than the threaded part. That's because most of my bikes aren't that old and have captive nuts.
On anything with a bolt and nut, I just use nyloc nuts.
You should see my DR750! I've lock-wired anything that stayed still long enough.
I went to so much much trouble to get weight off it and then added 30 pounds of lock-wire!!!