I replaced the rubber gasket when changing the primary fuel filter, but in the same kit that i ordered there was a crush washer as well. I did not see a crush washer when taking my primary fuel filter off... so i was wondering am i supposed to use a crush washer anywhere with the primary fuel filter? if so, should it be at the top of the bolt (on the top of the take between the bolt and the metal housing) or below between the filter and the housing).

Thanks!