I am not clear on what your threading your new brake line into. But, as already stated, all threads are metric on the Honda. And as Larry said, don't try and tighten it as there will be (Hell) to pay trying to thread in a metric end later.
The Hex end of the fitting is for a 10mm wrench, but the thread diameter is 8mm, 1.0 thread pitch if memory serves me correctly as I don't have one sitting with me as I answer this e-mail at 3 am. You should have the one you removed to use as a comparing item when you go to the parts store. But if you told the parts guy at the store what it was for when you purchased the first one, and he sold you a SAE then I'd look for another parts guy.
Bill
> -----Original Message-----
> From:
> 2cylinderhondas@yahoogroups.com [mailto:2cylinderhondas@yahoogroups.com] > On > Behalf Of > Larry Cooley > Sent:
> Sunday, October 09, 2005 10:02
> PM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] an 600 brake lines
> The "flare nuts" on
> the brake lines are a 10 mm thread... the brake lines with the proper > nuts can be purchased at Bap Geon and Napa auto parts > outlets in lengths that vary in 10 inch increments!!
> I hope you did not try
> to tighten the 3/16 line...the brass fittings are kind of soft!!
> Back on
> the street soon?!?!
> C'Ya
> Larry Cooley
> Wayne Linschied wrote:
> > Could they be Metric? Most Hondas
> > are.
> > Wayne
> > ----- Original Message -----
> > From: "Jonathan
> > Mistchenko and Sarah Reeves"
> >
> > To:
> >
> > Sent:
> > Sunday, October 09, 2005 6:00 PM
> > Subject: [2cylinderhondas] an 600 brake
> > lines
> > > I am replacing the long brake line to the back of the
> > car and the 3/16"
> > > lines I bought don't seem to be the right thread
> > pitch...they screw
> > together
> > > for a few rotations and then get very
> > tight before the flared end of the
> > > line has contacted its mating
> > surface. Do I need lines with a special
> > > thread on the
> > nuts? If so, where can I get them?
> > Thanks,
> > > Jon
> > Mistchenko
> > > Yahoo! Groups
> > Links