Gday John
Agreed, 1/2" is where it differs
( i should remember that as i have a lathe and mill and one uses 13TPI drawbars and the other uses 12TPI :-( )
But then i also noted the originally mentioned 10-32 is actually UNF
so "roughly" matches a BSF thread and these are different
Also found a good site since that shows some of the "form" differences in a concise format
https://anemo.eu/what-difference-bet...bsw-and-unfunc
Andrew