Post by
Grant@tirerack »
https://forums.nicoclub.com/grant-tirerack-u8792.html
Wed Feb 04, 2004 4:49 pm
Thre are two types of acorn nuts, standard acorn (the nuts have flat sides on the full length of the nut) and bulge acorn (the conical seat is slightly wider than the sides of the nut and will have a round bulge at the bottom). If your nuts will slide completely into a deep well socket, they are the standard ones. It there is a bulge that keeps the nut from sliding in, they are bulge acorn. Some wheels can not use the bulge type because of the size of the hole in the wheel. If these are the factory '96 nuts, I'd spring for the new ones. That way you know they match the wheels and are new.