Are Flare Nut, Line Wrenches Any Better Than A Regular End Wrench When Loosening Or Tightening Tube Ends? Let’s Settle This!


Are Flare Nut, Line Wrenches Any Better Than A Regular End Wrench When Loosening Or Tightening Tube Ends? Let’s Settle This!

The right tools can make a huge difference in how well, or how easily, you complete a project. But there are also plenty of tools that are available that are far from necessary. I’m a low buck tools kind of guy usually, because I need a big bang for your buck when it comes to tool purchases, but if a tool is actually necessary then I’ll get it if I can afford it. One specialty tool that I do have in my box, but that lots of folks don’t seem to own, are line/tubing wrenches or flare nut wrenches. Whatever you call them, they are the ones you need to remove factory brake line fittings and such without tearing them up. These box end wrenches have a slot cut into the end so that you can slide them around a tube and onto the nut on the end so that you get more contact on the flats of the nuts than you can get using just a regular open ended wrench. It makes sense, and I think it really does make a difference in how much force you can put on them to remove an old nasty tube nut. But does the science agree?

Watch this Project Farm tool test video and see what you think.

Video Description:

Wrench Sets: Snap On, Proto, Williams, Mac Tools, Crescent, Kobalt, GearWrench, Duratech, Milwaukee, Performance Tool, Craftsman, Matco Tools, Quinn, Efficere. Several sizes of wrenches were tested to determine overall best performing wrench set. Wrenches tested repeatedly revealed a huge durability issue for several brands.

Are flare nut wrenches a scam? Almost all of the flare nut wrenches became bent during the review. My “opinion” is that manufacturers make “soft” wrenches to avoid warranty claims. Once bent, the wrench will cause damage (round off) a fastener very easily instead of loosening the fastener or nut. A properly hardened tool offers much more strength but is also much more likely to break, instead of just bending.

I bought all of the wrenches and supplies used to test the wrenches to ensure an unbiased review. So, thank you for supporting the channel!


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