NPT is a standard for threaded pipe and fittings. NPT stands for national pipe thread. NPT fittings are tapered thread fitting and usually rely on mechanical deformation in between the male and female fittings to create a seal in addition with Teflon tape. Over tighteting may result in a leakage
SAE O-ring fittings are straight fittings and rely on the O-ring to create the seal rather than deformation as in NPT fittings. Since these fittings do not depend on deformation chances of a broken fitting are virtually eliminated.
NPT x NPT= (NPT)2 or N2P2T2
Thread angle is different (55° vs 60°).NPT threads are flattened at the peaks and valleys, while BSPT threads are rounded.Threads per inch (TPI) is different for two (except for a couple of cases).
Full form of NPT is "National Pipe Thread"
npt, national pipe thread, is a standard for threads on a screw. I (not a plumber) don't believe "npt valve" makes sense , but probably refers to a valve which has npt threading. Yes, a NPT Valve would be a valve with pipe threads as opposed to a sweat valve which has solder connections. There are several other type of piping connections too.
National Pipe Tap, the angled self sealing thread of a pipe fitting
There is no difference between 863 bronze and SAE 863 bronze - they refer to the same material. SAE 863 bronze is designated by the Society of Automotive Engineers (SAE) and is also known as 863 aluminum bronze or C86300 bronze.
Check out this URL: http://www.upmpg.com/tech_articles/motoroil_viscosity/ I believe your question will be answered there.
NPT = pipe Briggs standard = Pipe NFT and NFC and ASAE = bolt
NPT x NPT= (NPT)2 or N2P2T2
Thread angle is different (55° vs 60°).NPT threads are flattened at the peaks and valleys, while BSPT threads are rounded.Threads per inch (TPI) is different for two (except for a couple of cases).
SAE 10W could be using in larger of range temperature, so SAE with W character also means suitable for winter season as well as tropical season or ambient temperature. this SAE 10W also means multi grade oil. thanks
SAE 10w30 is better for lower temp and SAE 20w40 is the opposite better hotter temps.Thanks
20w-50 indicates Synthetic-oil
Sea salt is mostly sodium chloride, but it contains a variety of other substances as well.
The weight of the oil when it is cold. The 15w is a thicker oil than the 10w when it is cold.
Full form of NPT is "National Pipe Thread"
What is the different between NAS & SAE.