Early A fan shroud mounting nuts?????

Any one know were to get the fan shroud mounting nuts that some how install in the factory radiator? Mine never had a shroud and has no nuts. LOL And I have no idea what they even look like. It has the place for them. Mot sure if they were just some form of tinnerman nuts or what. Have a factory shroud on the way and want to get it mounted up properly. Thanks!!