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Old 04-04-2017, 03:19 PM
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edwardc edwardc is offline
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Teflon tape will not affect the conductivity of the fitting. When the fitting is tightened, it cuts the tape into little spiral strips where the thread faces touch. These strips are then packed down onto the thread valleys, sealing them off. But the thread faces of the fitting and the substrate are in hard metal-to-metal contact. You can see this when you undo a taped fitting and the tape has been reduced to strings.
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