The ISO 286 system uses an alphanumeric code to define a (e.g., H7 or g6 ).
This part provides tabulated numerical data for limit deviations based on the nominal size of the part (up to 3,150 mm). Key Components of the ISO 286 System iso 286 pdf
and "h" (shaft) denote the zero line, where the lower (for holes) or upper (for shafts) limit deviation is zero. The ISO 286 system uses an alphanumeric code to define a (e
Indicates the position of the tolerance zone relative to the nominal (basic) size. iso 286 pdf
(A–ZC) are used for internal features ( holes ).
(a–zc) are used for external features ( shafts ).