Ms81-2021 Standard Pdf «FAST»

: Determines default tolerances when specific numerals or symbolic representations are left off a drawing sheet.

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These tolerances apply to individual machining work where specific dimensions are not otherwise indicated on the drawing. Division of Nominal Dimension (mm) 1st Class Tolerance (±) 2nd Class Tolerance (±) 6 and under Over 6 up to 30 Over 30 up to 120 Over 120 up to 315 Over 315 up to 1000 Key Requirements for Production Default Class : In general, 1st class tolerances should be used unless specified otherwise. Drawing Compliance : Determines default tolerances when specific numerals or