Originally Posted by
clevername
That bit about case hardening was very helpful, FBinNy, thanks.
If I get a new nut at the shop, could I assume that it would be a higher quality? (It's a good shop)
It may not be, but hundreds of millions of these parts are made, and the failure rate is pretty low. As I said, stuff happens, but it's nothing to get worked up over. Chalk it up to a fluke.