I have a Wide5 hub that measures .545 and I need to press new studs into it. I tried .585 knurl but thye wouldn't hold. I have a set of smooth shank studs that measure .620 - anybody care to guess what my hole should be to press them in? I think my hubs are '37ish, all 4. I am joining buick drums to the wide 5 hubs, the aluminum drum is thin and I am afraid I'll break the casting when I cram that .620 shoulder thru a .545 hole. I kinda think the original Ford spec was .620. Ford only shows the two sizes for passenger wheels, the more common .560 and the .620. Information on the Wide 5 is vague, even in the 'Green Book'. I thought it has to be the .620 and they showed up today and after messing with one I have doubts.