Yes is the simple answer, obviously when buying one second hand you need to check that you have all the correct bolts. We kept the bolts for the steel spare in the Eriba door in case of emergency. Only ever had to change a tyre once (so far).

That's a very interesting point you have raised, I have alloy wheels on my Troll and a steel spare but no spare nuts for the steel, another thing to add to my list for Jandi.