Getting to Leakproof with NPT & NPTF Threads: What Matters
https://www.industrialspec.com/about-us/blog/detail/npt-nptf-tapered-threads-and-leakproof-seals
NPT (National Pipe Taper) is a general-purpose tapered pipe thread, and NPTF (National Pipe Taper Fuel) is a dryseal tapered pipe thread. Visually, NPT and NPTF pipe threads look identical. Both thread types rely on thread interference for tight, robust connections. This thread interference is made possible primarily by their tapered design.
DA: 69 PA: 36 MOZ Rank: 54