Oil Leak

the last gasket set i got from Summit had three(3) gaskets
1 was a large one the went around the base where the adapter fits
the block...there was a thinner fiber washer that went between the bolt
head and the adapter...and the last one was a thicker cork one which
went on the large bolt inside so as to fit between the adapter and the
block...so the large bolt has two. one outside and one inside...no leaks