[dmjlambert]

Yes that's the part number 5WRW3. You just insert them in the flare fitting. Sandwich one between the steel surfaces of the tube and fitting. When you tighten it up you will only need to tighten a reasonable amount. I think they are pretty wonderful. Without using these gaskets, I tightened the connection at the fuel pump, and tightened it more, and tightened it more and more until finally I had no leak. There was no way to get the connection loose again without destroying the fuel pump. I'm surprised I didn't destroy the fuel pump putting it on. It takes more finesse and patience than I have to mate the steel surfaces and get them to not leak. Now that I have a box of these gaskets, I can whistle while I work, instead of grunting and cussing.