JIC (Joint Industry Council) and NPT (National Pipe Taper) are two different types of fittings used in fluid systems. JIC fittings have a 37-degree flare seating surface and are typically used for high-pressure applications, providing a metal-to-metal seal. NPT fittings have a tapered thread that seals by wedging the threads together, often requiring a sealant like Teflon tape, and are commonly used in low to medium pressure applications. See full answer »

NPT (National Pipe Taper) threads are designed to provide a mechanical seal by tightening the male and female threads together, while NPTF (National Pipe Taper Fuel) threads are designed to create a dry seal without the need for sealants, thanks to their tighter tolerances and interference fit. Essentially, NPTF threads offer a more leak-proof connection compared to standard NPT threads. See full answer »