I'm looking to avoid dimpling platenuts where reasonable, and know about using NAS1097AD3 (oops) rivets in slightly countersunk skin holes for that purpose. What is the minumum skin thickness that would be allowed for this?
I countersink 0.025" for NAS1097AD3-x rivets. Cover plate screw holes, etc. There are notes in my work shop showing the head height at 0.021". This contradicts gasman above. Not sure who's right.