(G) Brake Line Unions

I'm sure someone will know this, what size & thread are the brake pipe unions?

I think they are 10mm x 1.25 course thread can anyone confirm?

Sure it's that but can't confirm like yourself, it's a pretty standard thread across many cars.

Liam

I've just had all the brake lines redone on my Seicento and I'm sure that the unions were as you stated.

unions on solid pipe assuming these are the ones you mean - Type '1' or Type 'A' (depends where you ask) with male on each end

are you sure? have you fitted yours yet? I thought the type 1 was 3/8 fitting I'm sure that is what I used to get for my old Mini's can't see Fiat using Imperial fittings

this is what i was told by the lad who made them up for me, will double check it in my spare braided hose for you if you like? or if there is any way of knowing looking at either the flexi or the solid pipe i can check that for you?

They are definately metric, but I can't remember whether coarse or fine. Coarse I think, but don't quote me on it.

I have a box of unions and match it to the one I take off.

Cheers

D

i just used an adjustable spanner and a 10mm IIRC so not much help to you there?

I think he's looking for the thread size, not the spanner size.

Cheers

D

Cheers D

There are two popular sizes of metric 10 x 1 and 10 x 1.25 then there is course and fine threads available in each so that is a 75% chance of guessing wrong

Ah, I still have my old one's sat in the garage, want me to bring 'em ponte tomorrow?

Cheers Gaz that would be good only problem is I'm in Budapest at the minute

I'm trying to get stuff ordered so I can get my wife to pick them up for me so I can fit them at the weekend

Ah that is a small technicality isn't it

Never mind, any other way my old ones can help you?

Yes it is a bit obstical to working on the car when you're not actually in the same country as it

Not unless you can get one to someone who can tell you which thread size it actually is I'm pretty sure they are the ones I think but if i get it wrong i'm screwed for doing anything about it as I'm working away all next week again

No! 10x1 is M10 fine, 10x1.25 is M10 coarse. All modern metric threads have an angle of 60 degrees, !0mm is the o/d, 1,1.5 etc. the pitch. Folk will say "10mm 1.25 coarse" when they mean "10mm 1.25 (coarse)."

So 50% chance of getting it wrong.