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Brake Line Fitting Size

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Old Sep 19, 2011 | 11:21 PM
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Default Brake Line Fitting Size

68 power brake car. The hard line front and rear- what size is the pipe thread?

Last edited by 54greg; Sep 19, 2011 at 11:23 PM. Reason: Addl
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Old Sep 20, 2011 | 01:51 PM
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Hi Greg,
The std brake line flare nut is 9/16".
Are power brake lines a different size?
Regards,
Alan
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Old Sep 20, 2011 | 02:07 PM
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Hi Alan,

I believe the power unit lines are the same size are non power masters. The nut is 9/16; I was looking for the thread size so I could buy "caps" to block the lines when changing calipers.

Greg
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Old Sep 20, 2011 | 03:15 PM
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Hi Greg,
I have some small soft red plastic caps that were on the brake lines I've bought.
The large size is 1/2" inside dia., and the small size is 5/16" inside dia. .
I BELIEVE the 5/16" is what's at the caliper too.
Regards,
Alan
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Old Sep 20, 2011 | 03:26 PM
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Thank you
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Old Sep 20, 2011 | 03:33 PM
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They are not pipe thread.
1/2-20 and 9/16-18
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Old Sep 20, 2011 | 07:17 PM
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That's what I was looking for! Thank you
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Old Sep 16, 2017 | 07:58 AM
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Are all brake line fitting sized at 3/8-24? For a 71 with PB?
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