Dodgyger, First off: "four bolts" and "four nuts" You haven't given a context for bolts and nuts. I take it there should be something like "four spare bolts and four spare nuts". If so, "off" seems correct, not "of".
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Nona The Brit"Don't ask me why, it's just the convention in this sort of context."This is the answer that I was looking for. Is the convention in this sort of context the correct way?