Menene bambanci tsakanin PT da NPT? A: PT ne British cone thread, mafi yawan amfani da hatimi, PT hakora kusurwa ne 55 digiri; NPT ne Amurka cone thread, mafi girma fiye da Ingila da wannan alamar thread girma, da kuma girma da screw nisa, Arewacin Amurka yankin da aka saba amfani da shi, NPT hakora kusurwar hakora ne 60 digiri