Sounds like your trying to ask the administrators who wrote the article?
Well just to let you know that they arent always going to answer. This forum is usually monitored by us "commoners" LOL
To answer your question the id of 3/8 (.375) line is actually 11/32(.344) .
About the connection question, What do you want to know?? You need to be very specific to ensure a correct and thorough answer.