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Old 04-16-2020, 02:53 PM
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Master cylinder stripped Flare nut size help?

I stripped the master cylinder brake line flare nut. I think thats what its called. There are two that thred into the master cylinder. its a 5/16 brake line, I think the flare nut is M12 1.0 thred. I can't find the nut anywhere and was hoping for some help? I can get the 5/16 line and flare it my self. I have the union. just need confirmation of nut size and or where to find it. BMW dealer said to buy the whole line. around $400. I just need the flare nut!
please help

Last edited by dwade277; 04-16-2020 at 05:38 PM.
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Old 04-16-2020, 03:18 PM
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When I re did my rear brakes I bought the flare nuts on amazon. Two sizes I that case but they are all 4.5mm 3/16 lines. The stock seemed to use 10 and 12 mm thread with 7/16 and 5/8 (11mm didn’t fit) but the replacements used metric nut sizes. Not sure about the size for the line right from master however but you can take the stripped part to a hardware store to thread into their thread utility.

You said “you can flare yourself “ do you have iso bubble flare? They are not single or double flares and you can’t buy iso flare tool in stores best I’ve been able to tell. Can’t even rent.


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Old 04-18-2020, 11:55 PM
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Quote:
Originally Posted by andrewwynn View Post

You said “you can flare yourself “ do you have iso bubble flare? They are not single or double flares and you can’t buy iso flare tool in stores best I’ve been able to tell. Can’t even rent. Pro
https://www.amazon.com/OTC-4504-Stin.../dp/B0015PMZMU
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Old 04-19-2020, 01:54 AM
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Yes that's the type of flare tool needed
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