I haven't actually even seen a steel bolt clip -- just brass. Perhaps that's why I've seen broken buttons.jonnythan:I've seen dozens of carabiners with broken gate springs (many wire gates avoid this by using the wire as the spring), but never a bolt snap. And if you can break the button off a steel bolt snap, I'm impressed... but hey, that's why you should use nylon line to tie everything to anything made of metal. If the opening mechanism fails and you need to disconnect, you cut the line.
I use a piece of Petzl "string" on nylon webbing for my console -- I'll upload a pic later.