Your shaftsize and thread is 1/4-28 A nine six may be a bit much but always get a selection to work with . An APC 9x4, 9x5 or 9x6 will fit without being to thick and you will have sufficient threads left over for the spinner nut.

Always remember with a spinner nut (The proper one for your engine is the one I linked in your other thread) They are designed to use no washer between the prop and the spinner nut and do not put anything between the thrust bushing/washer and the rear face of the propeller.


John