The most recent finger strainer I received had it built onto an AN6 blue fitting to avoid the extra part. He finger strainer connects directly to the tank bung and to the fuel line to the fuse.
Don't use plumber's tape or ProSeal. With pipe threads, use something like SealLube. You want something liquid/paste that allows it to go in (lube) and will help the threads seal. There are a number of products out there that work, but no tape and no ProSeal.