HI ! what is the effect of different geometrical dimensional on performance of nozzle although they have same nomenclature? i mean there is diesel injector BOSCH nozzle having nomenclature DN 6S 197 but there is observed difference in dimension or u can say tolerance of fuel feed hole between the nozzle made in france and the nozzle made in INDIA . more over indian nozzle observed to have increase failure rate ! can any body plz let me know how big companies ensure quality control ? is there any international standard ? do these nozzles with same nomenclature should have different geometry dimension ? what are different test which can reveal and prove that geometry difference will affect performance ? help and time is appreciated