This SAE Standard specifies basic tolerances and dimensions for inboard propeller-shaft ends@ propeller hubs and keyways for shaft sizes 3/4 in (19 mm) through 8 in (203 mm).
SAE J755-2015 history
2015SAE J755-2015 Marine Propeller-Shaft Ends and Hubs
2009SAE J755-2009 Marine Propeller-Shaft Ends and Hubs
1980SAE J755-1980 Marine Propeller-Shaft Ends and Hubs
1929SAE J755-1929 Marine Propeller-Shaft Ends and Hubs@ Standard;