I've got them mixed up! Which is which or doesn't it matter? The only difference seems to be that one of them has got a flange.
P.S. Yes I have got new crush washers for them.
From memory they are both the same, as above- I reckon the flange is an old washer that has become one with the bolt! As long as you have the right washers I can't see it making any difference which way you install them