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ISO 17:1973

Guide to the use of preferred numbers and of series of preferred numbers

Apr 1, 1973

General information

90.60     Sep 3, 2025

ISO

ISO/TC 19

International Standard

17.020  

French   English  

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Published

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Scope

The best scale will be determined by taking into consideration, in particular, the two following contradictory tendencies: a scale with too wide steps involves a waste of materials and an increase in the cost of manufacture, whereas a too closely spaced scale leads to an increase in the cost of tooling and also in the value of stock inventories. In selecting a scale of numerical values, choose that series having the highest ratio consistent with the desiderata to be satisfied, in the order: R 5, R 10, etc.

Life cycle

NOW

PUBLISHED
ISO 17:1973
90.60 Close of review
Sep 3, 2025

National adoptions

SRPS A.A0.002:1984  
ISS

Guide to the use of preferred numbers and of series of preferred numbers

90.60   Close of review

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