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Variations on dimensions without tolerance values are according to ISO 2768, all tolerance limits are given in mm.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

Tolerance class is defined as per design requirements and manufacturing capability.

They are approved in accordance with ISO procedures requiring at least 75 approval by the member bodies voting.

It applies to the dimensions of work pieces that are produced by metal removal or are formed from sheet metal.

It contains three tables and an informative annex with regard to concepts behind general tolerancing of dimensions.

It mainly applies to features which are produced by removal of material.

It contains tour tables and an informative annex A with regard to concepts behind general tolerancing of dimensions, as well as an informative annex B with further information.

For the deviation of size and for the deviations of the geometrical characteristics (form, orientation and location) the function of the part requires limitations which, when exceeded, impair this function.

At the time of publication, the editions indicated were valid.

All standards are subject to revision, and parties to agreements based on this part of ISO 2768 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

Members of IEC and ISO maintain registers of currently valid International Standards.

ISO 2768 Description ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).

The work of preparing International Standards is normally carried out through ISO technical committees.

Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.

International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

Iso 2768 Hole Tolerance Symbol