Hot Rod Forum banner
1 - 3 of 3 Posts

·
Registered
Joined
·
173 Posts
Steel tubing is generally connected using SAE inverted flare fittings. Flare nut slipped over the tubing and a 45º single flare formed on the tube. From there, you could adapt to pipe if necessary by using an NPT x IFF adapter.

Bob
 

·
Premium Member
Joined
·
4,097 Posts
The threads on the actual "tube nut" that fits 3/8 hard line is 5/8-18 straight standard NF threads.



A 3/8" NPT pipe has 18 threads per inch also, but is tapered, and the threadform is different.



Hope this helps,
Mikey
 
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top