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- 19:04, 15 January 2026 Admin talk contribs created page GDT:Perpendicularity (Created page with "{{Author Credit |author=Admin }} {{GDT Infobox |symbol=Perpendicularity |type=Orientation |category=Orientation |standard=ASME Y14.5 |author=Admin |datums=Primary datum required |modifiers=Diameter for cylindrical FOS; ST where allowed; material condition modifiers per feature type |tolerance_zone=Two perpendicular planes (planar) or a cylindrical zone (axis/feature of size) oriented 90 degrees to the datum |image=<!-- TODO: add diagram fil...")