This standard specifies the interchangeable dimensions of propeller hubs and propeller shaft ends for shaft diameters from 20 mm to 160 mm, with a taper of 1:10, 1) installed on recreational and commercial inboard motor boats.
GB/T 11699-2003 history
2008GB/T 11699-2008 Small craft with inboard engine.Propeller shaft ends and bosses
2003GB/T 11699-2003 Small craft with inboard engine--Propeller shaft ends and bosses with 1:10 taper
1989GB 11699-1989 Small craft--Inboard engine-propeller shaft ends and bosses