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ISO 3:1973

Preferred numbers — Series of preferred numbers ISO 3:1973

Publication date:   Apr 1, 1973

General information

90.60   Close of review   Jun 5, 2025

ISO

ISO/TC 19 Preferred numbers

International Standard

17.020   Metrology and measurement in general

Buying

Published

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Scope

Preferred numbers are the conventionally rounded of term values of geometrical series, including the integral powers of 10 and having as ratios special factors in accordance with the specified tables. Basic, expectional, R 80 and derived series are designated.

Life cycle

NOW

PUBLISHED
ISO 3:1973
90.60 Close of review
Jun 5, 2025

REVISED BY

ABANDON
ISO/WD 3




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