The #2910 fuel line pack nut and the #6154 elbow fit together just fine, but they don't fit anything available at the local hardware store. Can any of you experts tell me what this thread is called so I know what to look for?
Most of the suppliers have them. Like Dean said, 1/2 x 18. People will try to tell you they are 1/4 pipe straight but they aren't.
Tap and die sets are readily available along with the tap drill.