b.s.a.c15 clutch centre nut

[mossy]

hi guys,thanks for all the help in the past,i have a question re the central clutch nut.(the one you need a puller to get off).i am at the stage of refitting now and looking at all the books available it shows a tab washer.but mine just has a thick washer and the nut seems to just fit inside this before tightening.is this correct or am I missing something?