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turbogrill

Where to find Metric inverted flare to NPT adapters? (Wilwood on Miata/Datsun etc)

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Hi,

 

I am having troubles finding M10x1.0 metric inverted flares to NPT 1/8 adapters. This is needed if you want to run Wilwood on your Japanese car. So it should be pretty common? 

 

The only two sources I have found is:

https://www.flyinmiata.com/npt-to-metric-flare-adapter.html

https://zcardepot.com/metric-10mm-to-1-8-pipe-adaptor-brake-line-fitting.html

 

There are plenty of SAE M10x1.0 to NPT 1/8 adapeters but SAE and Metric is not the same thing.

 

Is there something obvious I am missing? 

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-3 adapters on both ends and a generic -3 line?

 

Also SAE M10x1.0 is not the same as Metric M10x1.0?  Is there a flare difference or something?  Threads are threads.

 

The other option is a NPT to -3AN adapter on the caliper and custom lines.

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Ditto Autozone.  Bough a bunch for our Honda last year.  I cleaned them out and needed more.  They ordered whatever I needed and had 'em in a couple days.  I'm sure any of the parts stores are the same, Autozone was just the only one that had any in stock that day.

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4 hours ago, Bremsen said:

-3 adapters on both ends and a generic -3 line?

 

Also SAE M10x1.0 is not the same as Metric M10x1.0?  Is there a flare difference or something?  Threads are threads.

 

The other option is a NPT to -3AN adapter on the caliper and custom lines.

 

Yes the flare is different, different angle. It *works* if you over tighten, it's close enough so that the force can deform it to work.

 

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23 minutes ago, turbogrill said:

Yes the flare is different, different angle. It *works* if you over tighten, it's close enough so that the force can deform it to work.

 

You mean SAE vs. DIN flare differences?  Your early Z should have SAE double flare on the hard lines, not DIN.....at least according to this site:

http://www.fedhillusa.com/?page=flare

 

 

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From what I understand there are at 2 different inverted flares with different flare angle:

- SAE double inverted flare (45 deg)

- Japan Metric double inverted flare  (37 deg)

 

That is what this site says, http://winhpde.com/tech/brake-line-flares-metric-sae-inverted-bubble/, scroll down to "Metric Vs SAE Flares" 

 

The SAE vs DIN seems to be bubble vs inverted flare.

 

(On anther note, seems like most of the big brake kits uses a -3 and adapter like you suggested. But I want to keep my hoses)

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I'd be absolutely sure that your car uses the JIS, ours has 45° fittings in places I would have thought would be JIS (I'm having to convert to AN) and your car is slightly older.  Also, from what I know, JIS and AN are the same 37° angle and can be used together.

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54 minutes ago, Bremsen said:

 JIS and AN are the same 37° angle and can be used together.

 

oh....so a male AN-3 plug into a double inverted female JIS?

 

 

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OK, I'm mixing up JIC and JIS now.  Argh, this stuff is so confusing.  I'm now seeing that JIS is 30°.  Never mind me, nothing to see here :blink:

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Perfect example of why when I install my Wilwood calipers and pedal box I am going to replace everything with -3 and NPT, much easier to get replacement bits if I need them.

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The Fox Mustang uses four or five different threads both standard and metric with different types of flares in the brake lines on a single car.  I also converted everything to 3/16 North American standard threads on the hard lines and -3 on the flex lines... life is so much easier this way.

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