When are you going to step up to Google Chrome as your default browser? All the cool kids are doing it.....
It's probably pipe threads: why not try HD or Lowes? No fuel will be going through it and you only need an airtight connector.
I have been known to stretch a smaller line over a slightly larger connection in that exact situation.....
What type hose ?? Non fuel related I'm thinking ??
Vacuum sucks, doesn't it?