I was wondering if Russell brand 5/16" compression fitting seals will fit in a Drag Specialties 5/16" fuel line crossover compression fitting? They look similar by the pic, I ordered the wrong ones and don't wanna have to pay $8 shipping for $2 part if there's no difference.

 

are you talking about ferrules or the combination nut. you might be able to get what you need from a hardware store as these pieces are sold separately.

 

No I'm talking about the rubber seal/ washer inside the compression fitting. It's for a crossover fuel line on a 02 Fatboy