need to run a line lock... can they be tapped to accept metric threads

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slickrock

slickrock

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Lemoore, CA (south of Fresno) / Cortes Island, B.C
I need to run a line lock. Most the kits out there (JEGS etc.) are all standard thread. Can the threads on a line lock be tapped to accept the metric threads from a cruiser? Or would it be easier to have special brake lines made with one in metric and the other standard?
 
slickrock said:
I need to run a line lock. Most the kits out there (JEGS etc.) are all standard thread. Can the threads on a line lock be tapped to accept the metric threads from a cruiser? Or would it be easier to have special brake lines made with one in metric and the other standard?
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Flare on the correct SAE fitting. I looked for the proper metric to SAE adapter and did not find one. Depending on how much your shop wants to flare fittings you may want to buy a tool and do it yourself.
 
I've had conversion brake lines made for just a few bucks.

Tapping seems like a bad idea IMO.
 
I added a GM master and a proportioning valve for my rear brakes. What I did was buy a double flare tool from Harbor Freight (dirt cheap). Then I bought some standard thread 3/16" brake fittings from a local performance shop. I cut the end off my stock hard lines, removed the original metric fitting, slid the new fitting on and reflared the end. It was actually way easier than I thought it would be. I bought a 12" premade brake line to cut and test a flare on first. The first flare I goofed up by over tightening the second step so it was good to practice once before I made a real flare. I also bought a cheap bender from Harbor Freight. It works great, but the radius is too large in my opinion.
 
I'll pick up a flare tool either from Harbor Freight or maybe a club member has a spare I can use. Thanks for the info guys
 
just rent a flare tool from the autoparts store when you pick up the SAE fittings. Autozone rents a decent OEM brand one that works well for free (you have to put a deposit down).
 
Hey! Your that guy from my 4x4 mag, in the readers rides section! I would have custom lines made...
 
Dan, no offense to the OP, but please don't use a cheap double flare tool. OTC makes a good one for about $35 and I had no problems with it, but the double flare can be a little tricky. Most parts stores will "rent" you one like said above. Go that route. JMO
Ed
 
or buy these from Swage-Lok.

But look out for the DOT police. They'll hunt you down and lock your arse up from what I have been told by some people here. And if you read it on the internet it must be true.

S-300-2.webp
S-300-2.webp
 
dgangle said:
or buy these from Swage-Lok.

But look out for the DOT police. They'll hunt you down and lock your arse up from what I have been told by some people here. And if you read it on the internet it must be true.

View attachment 468008
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That's cool stuff. Way to much on thier web site. happen to have a p/n?
 
 
So how do they work? Just cut your tube and side one of those bad boys on with no need to flare or do they still need flaring?
 
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