Crushed nuts work well too. To improvise, I just lay the nut on the side an give it a whack with the hammer. I believe the proper name for them are deformed thread lock nuts.
Oh, I think this is the same as the two previous post, LOL. Maybe I should have read the whole thread!
You do what you have to do, so you can do what you want to do!
Ole Hickory Ultra Que 2
18" Weber OTS
Primo Oval XL
NB American Gourmet offset smoker
Big Chief Smoker