Mechatronics End-of-Pathway (EOP) Practice Test

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N.P.T.F stands for National Pipe Taper Fuel Thread and is used on what?

National Pipe Taper Fuel Thread used on pipes and pipe fittings.

National Pipe Taper Fuel Thread is the thread form used on pipes and pipe fittings that carry fuels. The “Fuel” designation signals fuel service, and the tapered profile provides a tight, leak-resistant seal as joints are assembled, which is essential for piping containing gasoline, diesel, and similar fuels. This is specifically for fuel systems and their fittings, not for non-pressurized fittings or general hardware, and the other phrasings either misstate the designation or its intended use.

National Pipe Thread Fuel Type used for non-pressurized fittings.

National Pipe Thread for Fuel Transmission only.

National Pipe Taper Formula used for general hardware.

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