I see.  Yes, I bought two Equus gages at Kragen.  A voltmeter and mechanical oil pressure.  Today I found out there IS an electrical oil pressure for twice as much $$$ and requires a corresponding sensor to work with it.  Rhinoman, do you have a picture of that tee/adapter you can post up?  I wasn't able to use the adapters in the Equus tubing kit, they are not the same M10x1.0...look close but a lot coarser and slightly larger, I believe 1/4" NPT.
I think I actually have some of that copper in my tubing stash in the garage...

Maybe you're not looking at the same part I'm looking at - one side (male) is M10x1.0 and the other side (female) in 1/8 NPT, you have to put the adapter into the block and then screw the 1/8NPT fitting into it and then add the 1/8 line, ferrule etc.

Well I just ran all over town (again).  Autozone-nope.  Kragen-nope.  A VW specialty place-nope.  National Hardware (Ace) store-nope.  The problem is, I'm in the US and NOBODY carries ANYTHING for METRIC PIPE THREAD.  It's IMPOSSIBLE right now.  Even the biggest local hardware store here is trying to find an importer for Metric pipe thread, since they have so many people like me asking for it. 
M10x1.0 is not the right thread size; my OEM sensor is tapered, a pipe thread, that matches up to nothing. 
I just need whatever this odd metric size is, I need adapters for that, to go to 1/8" NPT.  That's all I need, anyone know where I can get that?

M10x1.0 is not the right thread size;

Have you measured it?

http://www.amazon.com/Equus-Pressure-Electronic-Metric-Adapter/dp/B000GKD5TM/ref=sr_1_1?ie=UTF8&s=automotive&qid=1246165023&sr=8-1

or find an AutoMeter stockist and take your pick.

Autometer #2265 - 1/8 NPT to M10x1.0
Autometer #2266 - 1/8 NPT to M12x1.0
Autometer #2267 - 1/8 NPT to M14x1.5
Autometer #2268 - 1/8 NPT to M16x1.5
Autometer #2269 - 1/8 NPT to 1/8 BSPT

Quote from: djlantis57 on June 27, 2009, 04:40:39 PM

M10x1.0 is not the right thread size;

Have you measured it?

Nobody has a thread that matches it whatsoever, so we can't even find out the correct thread pitch.  It's different from M10x1.0, that thread doesn't match, cause my sensor has "tapered" threads like NPT threads...M10x1.0 is a straight (bolt style) thread, so no taps/dies match what I have, it's like NPT but in Metric because of that taper.  I tried matching it to an M10x1.0 and it is too different to work.

Maybe I'm on a wild goose chase here...
I'm running around town with my ASSUMED OEM sensor...
what if it is one that someone has replaced with a bastard thread size sensor, and I am tracking down the wrong adapters, when my block really is M10x1.0???  Is it supposed to be a fitting with a tapered style thread pitch, or not?

yes its a tapered thread i.e pipe thread. it is a m10x1 thread also.

it is a m10x1 thread also.

M10x1.0 tapered pipe thread?  My last bet in Fresno I will check out tomorrow, they carry virtually everything as far as piping and tubing go, like new gas lines for cars, etc...so maybe they have my metric adapters and a tee and flex tubing that'll work

I ran into the same problems trying to find an adapter for mine when I built my turbo . I finally gave up, quit wasting time, and made a bottom tap from a regular 1/8 npt tap, and just rethreaded the oil sender hole. I greased up the tap to capture as much debris as possible, slowley and carefully ran the tap in to the threads which were already very close, cleaned it out thouroughly, and it's worked great ever since, 3 yrs, no leaks. Then I was able to use common 1/8th npt fittings from wherever,  and put in the tee, and use both the idiot lite sender and the oil pressure guage. BTW, I use an Auto Meter Electric Oil Pressure guage. The sending unit still needs to be plumbed to your engine oil fitting, but only one wire runs into the cab. No oil in the cab.   

Thats the same thing I did with my Samurai, except mine is mechanical, over 4+ yrs no leaks, Use the 1/8 tap and use some teflon tape on the threads. you should have no problems.

We went to CSC Central Supply Co in Fresno, CA today.  They do all sorts of tubing and crimp ends etc.  Helped us on our K5 Blazer gas lines in the past.  Got a 20" SS-braid flex line, to a brass 1/8" NPT tee (3 female sides), and a special fitting.  Found out the sensor is, indeed, not M10x1.0 thread, but a bastard British thread (imagine that:  Suzuki=Japan, uses a British thread on the block and sensor???).  Anyways, American 1/8" NPT is 1/8-27...the British is 1/8-28...one thread pitch off.  So we got an adapter for a STRAIGHT 1/8-28 (not the more correct tapered, as it would be two days to ship) to go to the end of the 20" flex.  The 1/8-28 thread goes into the block quite a ways, then stiffens up...Liquid Wrench and careful screwing in and backing off a few threads at a time are doing just fine to get it in the rest of the way.  Then, the OEM sensor threads into the standard 1/8" NPT tee, with a little RTV silicone to back it up.  Problem solved!  Finish it tomorrow (I had to work tonight).  Run the nylon tube through the firewall and sheath it in wire loom and keep a careful eye out for leaks, and I'm good to go.  Hopefully do it all tomorrow so I can take some pictures of the "finished" dash

FINISHED: thought I'd post pics of what worked and what didn't:
so an 1/8-28 fitting into the block, built-in o-ring seal.  Then 20" of SS flex, to a 1/8"-NPT tee female-three-way.  sensor in one side, oil line in the other, to gauge.  here's a few pics of how it turned out.
I cut a random o-ring to help isolate the line and eliminate rubbing/chafing, and secured it all to the driver's strut mount fender area.

and more...
...and the dash panel all done.  I was able to tie into the dimmer circuit using the old ashtray's light wiring, and they dim with the rest of the gauges.  No interference with stereo face, or anything.  And the CB mic is close enough to reach too

  NICE!

I had to do the same on my honda they use BSP (british standard pipe thread as well) if you do a search for 1/8 bsp fitting they can easily be found. its just knowing what you are looking for is the hard part!