Go Back   HondaSwap Forums > Technical Articles and Reference > General Tech Articles

AN and NPT fittings

Welcome, Guest! Please Register or Login:
  

Members have access to more features, better search, and see fewer ads! It's free, what are you waiting for?

Reply
 
LinkBack Thread Tools
Old 12-24-2002, 03:58 AM   #1
RETIRED
 
pissedoffsol's Avatar
 
Join Date: Sep 2002
Location: Retirement Home
Age: 29
Posts: 49,951
iTrader: 2 / 100%
Ride:  Electric Scooter
Blog Entries: 1
Rep Power: 531 pissedoffsol is a splendid one to beholdpissedoffsol is a splendid one to beholdpissedoffsol is a splendid one to beholdpissedoffsol is a splendid one to beholdpissedoffsol is a splendid one to beholdpissedoffsol is a splendid one to behold
Default

http://www.geocities.com/chipman_13/AN-NPT.html

great chart and a little history!!

Since Geocities is un-reliable at best, here's the article text.

Quote:
AN" Thread Sizes
AN sizes, originally developed for use by the U.S. Armed forces ("A" for army and "N" for navy), describe the outside diameter (O.D.) of tubing in 1/16-inch increments. For example, an AN 2 fitting will fit a tube with an O.D. of 2/16", or 1/8", while an AN 8 fitting will fit a tube with an O.D. of 8/16", or 1/2". Because the actual thickness of tube walls can vary from brand to brand, the inside diameter of a tube is not used as a reference. You will also find the dash (-) symbol or the word "dash" itself used in conjunction with AN sizes. A "dash six" fitting translates to AN-6.

Each AN fitting has an established thread sizing. The following chart shows the relationship between AN size, tube O.D., and SAE thread size:

"NPT" Thread Sizes
NPT sizes (National Pipe Taper) are the most commonly used fitting sizes for general plumbing, piping, and tubing use; not quite as popular as AN for automotive use, but still very common. While AN fittings depend on the outside diameter of a tube for sizing, NPT fittings depend on the interior diameter (I.D.) of the fitting itself. The following chart shows the each size's thread-per-inch count, the I.D. of the fitting, and the AN fitting size with the closest-matching I.D.(inside dimension).
pissedoffsol is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 02:21 PM.


Powered by vBulletin® Version 3.7.x
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
SEO by vBSEO
© 2001-2009 HondaSwap.com
One of the largest message boards on the web !  | a SkeyMedia Network site

Advertise on Hondaswap.com