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Old 05-02-2010, 11:50 AM
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That is what is called the metric bubble flare, or maybe metric ISO flare, I can't remember which its called at the moment. They will not seal if you re-flare to 45 or 37 flare unless you also change whatever fitting they screw into to match the new flare type.

Your current fitting makes a double seal, to the bottom of the step at the fitting and at the top of the step to the nut.
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