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Discussion Starter #1
I am doing a brake swap that I designed for my '66 Fairlane. I am taking Granada spindles (this is an already popular swap) and am putting '99-Up Mustang GT dual piston PBR calipers onto it with some bracketry that I've designed. You can see it here if you'd like <a href="http://www.geocities.com/fairlaniac/brakes.html" target="_blank">http://www.geocities.com/fairlaniac/brakes.html</a> My question: The fitting that goes into the caliper for the brake line is using what thread type? I took a calper to NAPA and bought a 1/4 brake line and the fittings on the end fit but I am not aware what thread it is. The one calpier has boogered up threads that lead in and I'd like to run a tap thru to clea them up. I have check all of my machine screw thread taps, straight pipe taps but to no avail. Maybe it is even metric and the 1/4 line from NAPA just happened to fit. In general, what threads are usually used on all brake line applicatons?

Thanks!
Doug Bender ( Fairlaniac )
1966 Fairlane 428 8V Tunnel Wedge
<a href="http://www.geocities.com/fairlaniac" target="_blank">www.geocities.com/fairlaniac</a>

[ June 04, 2002: Message edited by: fe428fairlane ]</p>
 

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Discussion Starter #3
It's not either of them, I checked. I think I may have it narrowed down to a bastardized 7/16-24.

Thanks,
Doug
 

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All brake line fittings use what's called straight pipe thread or in machinist terms NPST (National Pipe Straight Thread), it is basically a pipe thread without the taper. Unfortunetly there is no common size to all vehicles and imports will have metric threads. The one you see on the premade preflared tubing already at length are usually 1/8 NPST and many domestic cars will have this thread at least at one end of any brake line. There are kits available that have all the different threaded flare ends used in most vehicles so you can adapt and make your own lines. Might be hard to find in some areas.
 

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Tazz
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should be metric. try a tap in the good, unbuggered calaper.my 37 dodge has this setup and its metric threads. :D
 

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Discussion Starter #6
Thanks for all of the input!

Doug
 
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