NPT to AN Converision Chart

[68protouring454]

i assume hes asking which npt sizes are close to each a.n size.
most of the a.n fitting companys, aeroquip, Russell etc provide a diagram in there catalogs, looks for one online.

[bentfab]

John
There is no conversion. Pipe thread is pipe thread which is a tapered thread and seals on the thread hence pipe tape pipe dope which is used to seal the thread. The taper is what seals and the tape or dope help from any liquid or air bypass. AN adapters and fittings are a strait thread. These types of fittings seal on a surface weather it be on the degree of the male and female contact point (37 or 45 degree)or on the actual surface where the nut would come into contact. Thats where you would use a crush washer or o-ring. In relation to pipe and AN in our industry everything is based in 1/16's of an inch. I don't no of any or have never used a - size smaller than -2 which is 1/8" in relation.
The sizes are as follows. 1/8= -2 which is 1/8 pipe, 3/16= -3 no pipe size 1/4= -4 which is 1/4 pipe, 5/16= -5 no pipe size, 3/8= -6 which is 3/8 pipe, 1/2= -8 which is 1/2 pipe, 5/8= -10 no pipe, 3/4= -12 which is 3/4 pipe, -14= 7/8 no pipe, -16= 1" which is 1" pipe, and so on. These are the most common used in our industry. Hope this makes it clear.

[ironworks]

You might be meaning
1/8" = #2
3/16" = #3
1/4" = #4
3/8" = #6
1/2" = #8
5/8" = #10
3/4" = #12
1" = #16
1 1/4" #20
1 1/2" #24

This might help you out.It is pretty much an industry standard.

Rodger

[bentfab]

Ok Roger quit trying to one-up me!!! LOL. By the way answer your phone. I have the frame rails ready

[ironworks]

Originally Posted by bentfab

Ok Roger quit trying to one-up me!!! LOL. By the way answer your phone. I have the frame rails ready

My phone has not rang all day. I was at the track all after noon.

Rodger

[novanutcase]

I think Rodger hit upon what I was looking for but I found this which pretty much explains it.

http://www.chevellestuff.com/tech/an_fittings.htm

Basically, I want to pull a schraeder valve from a fuel rail and run a Fuel Pressure gauge on the rail. The schraeder valve is 1/16" male NPT and the Fuel Pressure Gauge runs a 1/8" female NPT. I was trying to locate a 45* aluminum adapter rather than a straight brass one.

John

[bentfab]

Originally Posted by ironworks

My phone has not rang all day. I was at the track all after noon.

Rodger

Rodger,
I rang the wrong phone.


John,
Good luck trying to find it in a 45. Either Godman high performance or Pure choice motorsports I think has that adapter in a strait. Or you can go to a local auto parts store with an Edelman brass air hose fitting selection. Take a fitting that has a 1/8" compression hose to 1/8 pipe female adpter like in your autometer oil pressure kits. Unscrew the hose side and if I remeber correctly that thread will screw into the shraider hole. From there you can put a 45 on it but it might start to look ugly being that long. Hope this helps.

[novanutcase]

Originally Posted by bentfab

Rodger,
I rang the wrong phone.


John,
Good luck trying to find it in a 45. Either Godman high performance or Pure choice motorsports I think has that adapter in a strait. Or you can go to a local auto parts store with an Edelman brass air hose fitting selection. Take a fitting that has a 1/8" compression hose to 1/8 pipe female adpter like in your autometer oil pressure kits. Unscrew the hose side and if I remeber correctly that thread will screw into the shraider hole. From there you can put a 45 on it but it might start to look ugly being that long. Hope this helps.

Thanks but, yeah, just too many adapters on top of adapters. I wanted to find a tee that had a 1/16" male NPT-1/16" female npt-1/8" female NPT. This way I could use the 1/16" Male NPT where the schraeder valve was and move the scrhaeder to the 1/16" female NPT and put the fuel pressure gauge on the 1/8" NPT.

John

[bentfab]

Originally Posted by novanutcase

Thanks but, yeah, just too many adapters on top of adapters. I wanted to find a tee that had a 1/16" male NPT-1/16" female npt-1/8" female NPT. This way I could use the 1/16" Male NPT where the schraeder valve was and move the scrhaeder to the 1/16" female NPT and put the fuel pressure gauge on the 1/8" NPT.

John

I do it on a regular base. Try making your own fitting. Find the proper fittings that your going to use cut them apart and silver soder them together. This way you can make your tee that you want

Mark

[B Schein]

The AN size to fractional size have been posted but in case you don't want to memerize them it works in 16ths

example -6 is 6/16=3/8

http://www.bmrs.net/ti-6.htm