5406-08-04 carbon steel with clear zinc plating.
SS-5406-08-04 Is 316 Stainless steel. See full answer »

NPTF stands for National Pipe Taper Fuel, which is a type of tapered pipe thread used for creating pressure-tight seals in piping systems. Unlike NPT (National Pipe Taper) threads, NPTF threads are designed to create a dry seal without the need for additional sealing compounds or tape. See full answer »

NPT (National Pipe Taper) and NPTF (National Pipe Taper Fuel) threads are both tapered threads used for creating pressure-tight seals. The primary difference is that NPT threads require a sealing compound to prevent leaks, while NPTF threads are designed to create a dry seal without the need for additional sealants. This is achieved through tighter manufacturing tolerances and a slight difference in thread profile, allowing NPTF threads to deform slightly upon tightening to create a seal. See full answer »