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ISO 2768

Which tolerance applies to a dimension without one? Enter the size and the class from the title block.

Example: A 45 mm dimension, ISO 2768-mK → ±0.3 mm; an angle with a 30 mm leg → ±0°30′.

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General tolerances ISO 2768

Applies to dimensions without their own tolerance when the title block says e.g. "ISO 2768-mK". Lower-case letter = lengths and angles (part 1), upper-case = form and position (part 2).

Class — lengths & angles
Class — form & position

Linear dimensions (ISO 2768-1), ± mm

Form and position (ISO 2768-2), mm

    Values per ISO 2768-1:1989 and ISO 2768-2:1989. A newer alternative for form and position is ISO 22081; ISO 2768 is still widely used in practice.

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