Whenever I purchase a STP or any oil filter for my 603 from a mc parts store, they all seem to come with a filter and a little bag with a big o-ring, a small o-ring, and 2 brass crush rings.

The big rubber o-ring goes with the oil filter housing, obviously.
The smaller rubber o-ring, I believe goes on the stem of the oil filter housing.
The bigger of the 2 brass crush rings fits either on the oil filter housing stem, or the drain cap. Which is it?
And I have no idea where the small crush ring goes.

Can someone please help clear this up?
Thanks.

__________________
Jason

00 Subaru Legacy (fun wagon)
96 Nissan Sentra (disavowed)
82 300SD (garage queen, will run again hopefully)
87 300DT (Gone: 10/15/2010)