Brake system overhaul

It's a bit smaller than 1/2" UNF, and bigger than 7/16" UNF. In fact, the minor diameter of the thread is 7/16" (I can just get a 7/16 bolt into the hole inside the threads).

I guess the next step is to take it down to Better Brakes and see if they have a fitting which goes in.

Peter

In answer to my own question, the picture below shows how it all fits together.

Yes, there are metric and imperial mixed on the same fitting.

Yes, the 3/8UNF on the master cylinder connects to the 7/16UNF on the proportioning valve.

Yes, the 12mm on the master cylinder connects to the 3/8UNF on the proportioning valve.

No, the 3/8 fittings don't connect to each other, that would be too sensible.

I hope this helps somebody else, it took a while to figure this lot out.

Peter

Quote:

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Originally Posted by peterg1001

Can anyone tell me the thread sizes of the brake pipe fittings on a NRC4880 proportioning valve and a NRC6096 master cylinder? I'm pretty sure the proportioning valve has 3/8 UNF and 7/16 UNF fittings, and the master cylinder has a 3/8 UNF, but what the other fitting on the master cylinder is I have no idea. It's about 12mm in size, but it's not metric and I don't think it's UNF either.

Any help appreciated, thanks, Peter.

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Witworth???? Old English maybe