In that article there is #4 Flat Seat lug nut. Is that the pass-through style needed for some racing applications? As it proves/provides that the bolt is long enough and not too short and hidden by other types of lug nuts? I once asked a friend of my brother if he had tested his home garage hotrod on a track. He said he hasn't as he didn't have the right lug nuts. It was registered for the road and just for fun anyways.