A few questions about fittings and SS lines... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Chrisw · 03-13-2012, 08:21 PM

So I'm just staring to redo a lot of my lines. A few of the lines I have to tap a hole and then get te correct fitting for it. An example of this is the fitting from my valve cover that feeds to my catch can.

What's the difference between AN and NPT? I know what they stand for but which one should I be using? And why?

How do I know what size of fitting goes into a specific hole size? I assume there is a better way then eye balling it.

I also have a question in relation to a specific line. I'll post a picture tonight when I finally get home.

Thanks guys.

Nkelley · 03-13-2012, 08:43 PM

go with an lines, there much better looking and will suit all your needs. AN fittings go by 1/16 basically. Easiest way to figure out the size is and /16 to the end of each fitting size

So if you have a 1/2" hole you'll need a -8 fitting. (8/16")

If your doing your catch can lines i run a -10 from valve cover to catch can..

Chrisw · 03-13-2012, 10:24 PM

Quote:

Originally Posted by Nkelley

go with an lines, there much better looking and will suit all your needs. AN fittings go by 1/16 basically. Easiest way to figure out the size is and /16 to the end of each fitting size

So if you have a 1/2" hole you'll need a -8 fitting. (8/16")

If your doing your catch can lines i run a -10 from valve cover to catch can..

Ok! Thanks man! That -10 is for an SR obviously I assume...

03-13-2012, 08:21 PM	#1
Chrisw Zilvia Member Join Date: Jan 2008 Location: Edmonton Age: 40 Posts: 264 Trader Rating: (2) Feedback Score: 2 reviews	A few questions about fittings and SS lines... So I'm just staring to redo a lot of my lines. A few of the lines I have to tap a hole and then get te correct fitting for it. An example of this is the fitting from my valve cover that feeds to my catch can. What's the difference between AN and NPT? I know what they stand for but which one should I be using? And why? How do I know what size of fitting goes into a specific hole size? I assume there is a better way then eye balling it. I also have a question in relation to a specific line. I'll post a picture tonight when I finally get home. Thanks guys.

03-13-2012, 08:43 PM	#2
Nkelley Zilvia Member Join Date: May 2010 Location: phoenix, az Age: 34 Posts: 283 Trader Rating: (10) Feedback Score: 10 reviews	go with an lines, there much better looking and will suit all your needs. AN fittings go by 1/16 basically. Easiest way to figure out the size is and /16 to the end of each fitting size So if you have a 1/2" hole you'll need a -8 fitting. (8/16") If your doing your catch can lines i run a -10 from valve cover to catch can..