'89 Brake line fitting threads: metric or standard?

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Aug 4, 2017 | 01:13 PM

Tom400CFI

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From: Park City Utah

'89 Brake line fitting threads: metric or standard?

I need to remove the ABS assy from my '89 Kart project....I want to union the lines together and am looking at fittings on Summit. Anyone know the thread spec? I was assuming it is 10mm x 1.0 threads, but not sure.

Aug 4, 2017 | 03:02 PM

Patsgarage

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From: Outside the Quick Stop N.J.

Quote:

Originally Posted by Tom400CFI

I am 90 % sure that you are right, M10 x 1.0 sounds right to me. Love the kart project, keep the updates coming.

Aug 4, 2017 | 03:54 PM

Joe C

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if memory serves me right, my 85's are 10mm x 1.0

Aug 4, 2017 | 04:27 PM

Tom400CFI

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From: Park City Utah

Perfect. Thanks guys!

Aug 4, 2017 | 07:03 PM

C409

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From: Clearwater Florida

..... You will need at least one 10mm TEE fitting ... try your local VW Bug salvage yard ... they have them and are reasonable .....

Aug 4, 2017 | 08:51 PM

WVZR-1

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I believe you'll find that everywhere there's an "inverted nut" used that it will likely have an ISO Flare or more frequently now referred to as a "bubble" flare. A ISO/bubble uses a very different inverted nut and requires different flaring procedure. I have some OE brake hoses here and they appear to want an ISO/bubble.

The GM ISO is different than the VW/Audi style that I see often on Summit.

This is what I believe you'll find on the hard-lines that you remove. Posted the link just for the image.

Amazon

Last edited by WVZR-1; Aug 4, 2017 at 09:08 PM.

Aug 5, 2017 | 12:24 AM

Tom400CFI

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From: Park City Utah

Yep. That is what it looks like. I actually got OCD tonight and removed one to check; sure enough, it's a 10X1.0 and it looks like the one in the Amazon link.

Now...where do I find a three way "bubble" flare union? Summit doesn't have 'em.