Originally posted by BluFin
7/16 - 14 TPI is a UNC 25 ft/lbs fink you were looking at the Lh block for the 80 rather than the RH block for the "Heavies"
MMmmnn, as I read it, Splitpin wanted to know the thread type/size of the bolt that locates the rear of the lower unit to the mid section, that is hidden by the tab and you access once the trim tab/anode is removed.
The only 7/16 UNC (14tpi) I can see listed there, is the one that actually screws into the tab/anode itself to locate it.
So I assume that all the main locating/retaining bolts for lower/mid, are 7/16 UNF (20tpi)