api5000API has specified weld necks for many 6BX flanges, and not done so for many others, but API has provided the basis for determining the dimensions of a 6BX integral flange that the manufacturer may attach to aAB Sciex API 5000 Triple Quad LCMS. The AB Sciex API 5000 Triple Quad LCMS is a cutting-edge mass spectrometer desned for laboratories that demand superior sensitivity