10mm x 1mm brake union
 

I want to toss the brake prop valve and am having a hard time finding the correct fitting to connect the brake lines. Napa and Autozone may have had them a couple years ago but don't now. I've called the specialty brake shops around town and they can't help. Google wasn't much help.

Anyplace I can order them online?

FM has an NPT to Metric adapter. Then you'd need an NPT union. A little pricey and a little complicated, but easy.

I was wondering if I could use FM's adapter to hook up a line lock.......