Fuel injector return lines

[bguy193]

I have searched a lot of threads on the topic and could not dig up a final answer. I have heard that the ferrule nuts on the injector return lines are a an oddball thread.... If this is true has any body found a source and part number for them??? If it is not true is the Mcmaster # 50815k104 or Napa # 100X4 the right ones????? I have found a lot of part numbers floating around and people that were going to use those parts, but I couldn't find an update on whether or not that the parts had worked........ I am going to be replacing my return lines soon and I want to have parts on hand before I tear into it, in case I can't reuse the nuts. Anything I don't use will be kept as spare parts.
Thanks ahead to all that can help

 

[deuceman51]

Regular ferrules. I actually use DOT nylon air line which is rated for fuel. Haven't had any trouble in years and have had numberous mechanics tell me they use it also for this application.

 

[Heavysteven]

Here is a thread that I hope helps.

http://www.steelsoldiers.com/deuce/24931-fuel-return-fittings-2.html