Quite a bit posted about this topic, I know. 69Z28 (Gary) asked a week ago under 69ZEE's (Darrell) post about a pic of his fitting. I began to look for my fitting, which I can say without question, is the original fitting off my L48 11D Nor U17 opt. car. There is a small brass pin in the ferrule that goes inside the plastic line. This looks the same as S. Shauger's in post #75. For the record, here are pics: