G'day Widget
That's a great question. You are helping other members here.
I look at things from an historical perspective.
I have said the lugs were locating devices.
Because the boss has a locating centric to locate the holder
that will keep the holder in balance.
The lugs play a secondary role: That is to accommodate
shock loads - say when you hit a fire hydrant hidden in the lawn.
In other words, they deflect wear away from the holder and washer.
So, yes, they do offer support. Yours has lost one-third protection.
However, I feel the best solution here is to fit the washer concave up.
If that doesn't work, replace the washer.
[Victa later went to stamping these washers 'Nut Side'].
In service, we would always replace the washer once its belleville
properties were lost - most probably due to incorrect re-fitting.
Hope this helps.-----------------------
Jack
