anyways i have a photo here and i am wondering what is missing other then the cap washer and nut
i do plan on replacing them but for now i am just going to put this one back on

as u can see the rubber dormant is there but there is a lot of space yet to get to the threds
is the dome washer is all i need. or is there another rubber?
thanks
i can not see very good on the other side so i can't tell what is missing