The Ford Barn - View Single Post - Heater hose connection in head. Brass plug fitment

Brian · 03-31-2023, 10:11 PM

What you're doing wrong is using the wrong plugs...5/8 UNF has 18 threads per inch, 3/8 National pipe thread has 18 TPI too. So, I'm assuming that the tap you are using is 5/8 UNF and your plugs are indeed pipe thread.

03-31-2023, 10:11 PM	#4
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,998	Re: Heater hose connection in head. Brass plug fitment What you're doing wrong is using the wrong plugs...5/8 UNF has 18 threads per inch, 3/8 National pipe thread has 18 TPI too. So, I'm assuming that the tap you are using is 5/8 UNF and your plugs are indeed pipe thread. __________________ Unfortunately, two half wits don't make a whole wit!