Pixelfill Posted May 25, 2007 Share Posted May 25, 2007 Right I can't seem to find any info on the various fittings available for sensors and oil lines etc. For instance, what is the difference between 1/8 NPT and 1/8 PT What is -4 AN? what measurements are they, etc. I'm rather confused. Help /vbb/images/smilies/bbcode_sad.gif Mike Link to comment Share on other sites More sharing options...
Jake Posted May 25, 2007 Share Posted May 25, 2007 That's a coincidence, I'm struggling with the same thing myself at the mo, trying to work out what I need to connect the oil line to my new turbo. This might help: http://en.wikipedia.org/wiki/AN_thread http://en.wikipedia.org/wiki/National_pipe_thread Link to comment Share on other sites More sharing options...
terribleturner Posted May 25, 2007 Share Posted May 25, 2007 Do as i did, take the bits down to your local Pirtek and say this is what you have and this is what i need And ask for discount. Mike did you get your bits today?? Link to comment Share on other sites More sharing options...
Pixelfill Posted May 25, 2007 Author Share Posted May 25, 2007 Do as i did, take the bits down to your local Pirtek and say this is what you have and this is what i need And ask for discount. Mike did you get your bits today?? I think so, I had a nice red card through the door inviting me to collect from the main depot Cheers James Mike Link to comment Share on other sites More sharing options...
Jake Posted May 25, 2007 Share Posted May 25, 2007 Do you know if they're open Saturdays James? I can't see any mention of opening hours on their web site. Link to comment Share on other sites More sharing options...
Pixelfill Posted May 25, 2007 Author Share Posted May 25, 2007 That's a coincidence, I'm struggling with the same thing myself at the mo, trying to work out what I need to connect the oil line to my new turbo. This might help: http://en.wikipedia.org/wiki/AN_thread http://en.wikipedia.org/wiki/National_pipe_thread ooo thanks Jake, I tried searching wikipedia, but I didn't have any success - presumably due to the shortness of the search term. Link to comment Share on other sites More sharing options...
Jake Posted May 25, 2007 Share Posted May 25, 2007 I usually search on google but put "wiki" at the end. e.g search Google for NPT thread wiki instead of searching on wiki itself. Link to comment Share on other sites More sharing options...
terribleturner Posted May 25, 2007 Share Posted May 25, 2007 Do you know if they're open Saturdays James? I can't see any mention of opening hours on their web site. Yeah, till 12 i belive. Link to comment Share on other sites More sharing options...
TLicense Posted May 25, 2007 Share Posted May 25, 2007 As Jakes link suggests -4 is reference to the O.D. of the hose. It's basically how many 16th's of an inch the O.D. is (ie 4/16th's or a 1/4") Where it becomes a bit trick is relating the OD of the hose to the size of the fitting that you wish to terminate the hose with. Again as Jakes wiki link mentions -4 is generally terminated by using a 7/16 diameter thread, with the pitch being 20 threads per inch (TPI) Which means it is UNF (Unified fine) as opposed to UNEF (Unified extra fine) which would be 28 TPI. It's one of those things I'm afraid that you either know or don't, I've not worked out a way of calculating one from the other. Jakes links are as good as any, so I would print those off and use them as reference. After a while it's one of those things you'll pick up. Another good reference is a "Zeus table" which is a little booklet with common used thread sizes and a host of other stuff. It doesn't have hose sizes though. Even after using the things on and off for over a decade, I still can't work out which spanner you would use for what size fitting. Link to comment Share on other sites More sharing options...
Pixelfill Posted May 25, 2007 Author Share Posted May 25, 2007 cheers Tony, Mike Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 25, 2007 Share Posted May 25, 2007 Get hold of an Earls fittings catalog, it's all explained and illustrated in there. They probably have a web site, too. Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 25, 2007 Share Posted May 25, 2007 NPT and PT are the same, NPT and BSP are pretty much interchangeable, this will help, http://www.colder.com/Downloads/NPT.pdf Link to comment Share on other sites More sharing options...
TLicense Posted May 25, 2007 Share Posted May 25, 2007 Get hold of an Earls fittings catalog, it's all explained and illustrated in there. They probably have a web site, too. Good call. Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 25, 2007 Share Posted May 25, 2007 Don't say I don't do anything for you... http://www.earls.co.uk/earls/car/car_index.html Go to plumbing basics and technical info, it's all there as I said. Link to comment Share on other sites More sharing options...
Pixelfill Posted May 25, 2007 Author Share Posted May 25, 2007 Thanks guys Mike Link to comment Share on other sites More sharing options...
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