Fitting Pitch thread.

[McRussellPants]

The wrong fitting sizes get posted alot. These are all I've found.

Water Line Fittings
Block 14x.15
Water Neck 14x1.5
GT Series Turbo 14x1.5

Oil Feed Fitting
Block 12x1.25 Fitting, 12x1.25 to -3 is kinda rare but pegasus can get it.
Ball Bearing Turbo 7/16ths Inverted Flare
Non Ball Bearing Turbo 1/8th NPT.

Power Steering
Return 16x1.5 O ringed
Rack High Pressure 14x1.5 O-ringed
Pump High Pressure 16x1.5 Crush Washer.

Other
Brake Booster Intake Manifold 14x1.5
Oil Block 1/8th BSPT
DEFI Water Temp Sender 1/8TH BSPT (only Juran has right pitch rad hose adapter)
Greddy Intake Manifold Ports 1/8th BSPT.

[CAPoweredS14]

Cool thanks, I actually need this for new power steering lines. And these are for any specific motor?

[McRussellPants]

shouldn't be.

[HalveBlue]

Where were you earlier today, dammit? I needed to to know the thread pitch on the S14 waterneck. Luckily I go the right adapter.

One thing on the Defi water temp sensor. According to Defi's website it's listed as 1/8 NPT, not BSPT. There may be a difference between imperial and metric gauges, however.

http://www.defi-shop.com/product/meter/meter_parts_imp.html

Good thread BTW.

[jobestudios]

Nice, I've been wanting to figure out this in a list for a while now, what size line would you recommend running for water line and oil line on a gt series turbo? What about a powersteering setup?

[da8o8santaclauz]

anyone know the thread pitch of s13 brake master cylinder?
and
the other thread pitch on the back of the greddy mani aside from the brakebooster vac one? and also the smaller vacs under the mani too hah

[Wiisass]

Pretty sure the little vaccuum ports under the greddy mani are 1/8" BSPT.

[timlush]

anyone know the thread pitch of s13 brake master cylinder?
and
the other thread pitch on the back of the greddy mani aside from the brakebooster vac one? and also the smaller vacs under the mani too hah

IIRC, all the brake fittings are 10X1.5.

Someone please correct me if I am wrong.

[timlush]

12x1.25 to -3 is kinda rare but pegasus can get it.


More info on this? I couldn't find it on their site...

edit: I found this
http://www.pegasusautoracing.com/productdetails.asp?RecId=5936

[ThatGuy]

Well done Russell.

Thank you for providing this information.

[bwake 5]

man i couldnt find the 12x1.25 to -3an fitting for the oil line block....tried pegasus or whatever and nothing.....i found one that i think might be it on takatamotorsports but it isnt specific.....i need that thing bad

[McRussellPants]

http://www.pegasusautoracing.com/group.asp?GroupID=BRAKEADAPTMET

8$

Technically it needs a crush washer.

I just used Teflon Tape.

[timlush]

A crush washer from a Nissan drain plug works perfect FYI.

[da8o8santaclauz]

IIRC, all the brake fittings are 10X1.5.

Someone please correct me if I am wrong.
can anyone verify this? i've been getting all kinds of respones, from 10x1.0, 10x1.25, now 10x1.5 etc.

[mrmephistopheles]

This is a great thread with great info, but it's better off in Tech.

[murda-c]

what about small and big o2 sensors?

[yarou]

What's the size of these two sensors right here? My old HKS water temp sensor seems to be the same but still possibly different, after tightening the HKS sensor in there it left a few small shavings. It looks dead on though when I compare both the threads

http://i46.photobucket.com/albums/f102/nenhenry/summer%20project/wefwed.jpg

http://i46.photobucket.com/albums/f102/nenhenry/summer%20project/IMG_4425.jpg

here's the HKS sensor end
http://i46.photobucket.com/albums/f102/nenhenry/summer%20project/IMG_4259.jpg

[Wiisass]

You guys know they sell thread pitch gauges. They're really cheap and they will tell you what pitch anything is. They have them for standard and metric.

Or another way would be go to the hardware store that has a good selection of bolts and nuts. And buy one of each of the different threads you think you will encouter. Then mark these carefully and use them to test the threads. Just don't be stupid and try and tighten them too much or this will not work very well as a way of figuring out threads.

And the brake line fittings look like m10x1, but I'm not 100% sure on that.

And those water fittings, if I remember right, they're M12x1.25.

But again, both of those could be easily measured. Most threads are different enough where you won't run into problems unless you're the type of person that shouldn't really be touching a car anyway.

The worst one is probably the difference between BSPT and NPT. 1/8" NPT is 27 threads per inch. 1/8" BSPT is 28 threads per inch. And you will be able to thread BSPT stuff into NPT holes and vice versa and it will screw up the threads or the fitting, depending on the materials. A lot of the ports on the motors and even aftermarket parts look like they're NPT, but they're really BSPT. So be careful about that one.

But other than those, everything can be measured pretty easily. Or you can use known nuts/bolts to measure stuff as well.

[cronux]

here's a strange one, 15/16ths male flare for EGR block off.

[timlush]

can anyone verify this? i've been getting all kinds of respones, from 10x1.0, 10x1.25, now 10x1.5 etc.

Now that you say that, I think it is 10X1.0.

Just search, shouldn't be too hard to find.

[burnsauto]

ok....question.

why did nissan/greddy/ etc decide to use BNPT thread pitch? Is that a standard thing to use in japan?

[Rizzo]

www.anplumbing.com (http://www.anplumbing.com) will have most fittings you wil need.

metric ones are here

http://www.anplumbing.com/shop/index.php?shop=&dept=Metric

nice thread, +1 for you.

[Wiisass]

ok....question.

why did nissan/greddy/ etc decide to use BNPT thread pitch? Is that a standard thing to use in japan?

It's British Standard Pipe Thread versus National Pipe Thread. I think it's just a metric thing or something else. I don't know why, but they did. I'm not sure if other Japanese Manufacturers used it as well, but I would assume that they did.

[turtl631]

What's the best way to seal the 16 x 1.5 mm fitting on the power steering pump? Just a regular 16mm crush washer? I looked into Stat-O-Seals and Dowty seals, but they don't come in metric equivalent sizes, and getting something that's "close enough" to 16mm seems ghetto.


Other question: is it advisable to tap a 1/8" BSPT port to 1/8" NPT? I don't like running adapters if possible.

[claymans13]

www.anplumbing.com (http://www.anplumbing.com) will have most fittings you wil need.

metric ones are here

http://www.anplumbing.com/shop/index.php?shop=&dept=Metric

nice thread, +1 for you.


FTW, I LOVE that site.fast shipping and better prices that summit or jegs.

[burnsauto]

It's British Standard Pipe Thread versus National Pipe Thread. I think it's just a metric thing or something else. I don't know why, but they did. I'm not sure if other Japanese Manufacturers used it as well, but I would assume that they did.

yeah i know it was BNPT...its just a little odd, always made me wonder if they (nissan) got a good deal on oil sending units...but they were BNPT.

[Wiisass]

yeah i know it was BNPT...its just a little odd, always made me wonder if they (nissan) got a good deal on oil sending units...but they were BNPT.

BSPT not BNPT.

[codyace]

What's the best way to seal the 16 x 1.5 mm fitting on the power steering pump? Just a regular 16mm crush washer? I looked into Stat-O-Seals and Dowty seals, but they don't come in metric equivalent sizes, and getting something that's "close enough" to 16mm seems ghetto.

I did mine last night...9/16 Statoseal works perfect

HOWEVER using two of them next to each other will require some very careful trimming of both (don't screw up the rubber o ring thingy) in order for them to sit flush.


Other question: is it advisable to tap a 1/8" BSPT port to 1/8" NPT? I don't like running adapters if possible.

Some may have gotten it to work, but I say no. Threads are tooooo close for my comfort. Adapter it is

[turtl631]

Why would you use two of them next to each other?

[Wiisass]

Cody, you mean 5/8" statoseal? 5/8" = 15.875mm

And I 100% agree with you on the tapping a BSPT hole to NPT. You would just end up with a mess. They're 1 thread per inch different. Run an adapter or hunt down a sensor with BSPT threads. Or weld on a fitting or drill it out to something bigger and tap it. There are ways to not run adapters.

[codyace]

Why would you use two of them next to each other?
Rack in and out. They came in a pack of two, so I used them :D

Cody, you mean 5/8" statoseal? 5/8" = 15.875mm

I had actually got the 9/16 per a thread on F/A about powersteeing, and they worked for both. Maybe it was a fluke??

[turtl631]

Lol, fair enough. Got any pics? Did you add a cooler also?

[the head]

Additional informaiton
SARD FPR uses 1/8" BSPT for its fuel pressure gauge port

[codyace]

What's the PCV thread (passenger side, redtop??)


Lol, fair enough. Got any pics? Did you add a cooler also?

Pics will be coming soon! Waiting on my manifold (external gate) and my Ecu (i had hooked my water injection up backwards and friend a diode, to that's repaired) to get back, to clean her all up nice.

I did run a cooler, mounted it on the drivers side (s14) atop the front frame rail. I used the two existing studs there (from the stock intake bracing iirc) and it fit perfectly (used a small permacool cooler with -6 lines)...painted it all semi black and used black a/n fittings...with the intake in there, I don't think people will ever even notice it hehe.


/thread jack.

[SHIFT_*grind*]

Bumping for...

What's the size of these two sensors right here? My old HKS water temp sensor seems to be the same but still possibly different, after tightening the HKS sensor in there it left a few small shavings. It looks dead on though when I compare both the threads

And those water fittings, if I remember right, they're M12x1.25.

Can anyone confirm this? I'm wondering specifically about the thread pitch for the water temp sensor for the gauge. I read somewhere else that it's M10 x 1.0. I'm about to order some adapter fittings from McMaster-Carr and at ~$10/piece, I don't want to get the wrong ones.

[MELLO*SOS]

Block 14x.15

14x1.5 :)


Here are my contributions

HKS standard wastegate: 1/8" BSPT
Block turbo drain port: 3/4 BSP (on RB, I assume SR is the same)

[drftmark]

fuel rail cover allen/hex head bolts.

m8x1.5 they are cheap at lowes and are a lot easier to take off than those damn screws that strip all the time.

[SHIFT_*grind*]

http://zilvia.net/f/tech-talk/190241-thread-pitch-oem-water-temp-sensor.html

Some say M12x1.25, some M10x1.0. I'm gonna whore this question around until it's confirmed :coolugh:

[s15specR]

I bought a 1/8th NPT Tap (ACE hardware < $10) and tapped near the fact. water temp sensor and the adapter for my oil pressure...both defi guages used the 1/8th NPT fitting.

[SHIFT_*grind*]

I pulled the sensor when I got home from work today.

Water temp sensor for the gauge is M12 x 1.25.