[AT] pipe threads

[Mike Reggie]

  This is just a guess, but I always thought the "F" after the NPT stood for 
female, I've also seen it following the designation NPS, which is generally 
just used for electrical fittings and is the same thread without the sealing 
capability of the tapered thread. Again just a guess, but could the thread 
you are looking for be a JIC thread?? I don't know how long that thread has 
been in use, but it seems to be a finer thread than the standard pipe 
thread, and I think it tapers.
  If I was near my copy of Machinery's Handbook I could check, but it is at 
the shop and I am home.

I hope this is of some help ........ Mike


----Original Message Follows----
From: "Ken and Mona Frost" <knmfrost at gulftel.com>
Reply-To: Antique tractor email discussion group 
<at at lists.antique-tractor.com>
To: <at at lists.antique-tractor.com>
Subject: [AT] pipe threads
Date: Sat, 24 Jun 2006 10:41:56 -0500

I'm trying to sort out some problems with a hydraulic line set up on an old 
case.   QUESTION:  the code NPT = national pipe thread, the common threaded 
pipe we use most of the time.  Does the code NPTF = national pipe thread 
fine?  I thought it did and ordered some NPTF fittings and got NPT who is 
right? I wanted fine threads.
Ken Frost
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