International Standard
ISO 237:1975
Rotating tools with parallel shanks — Diameters of shanks and sizes of driving squares
Reference number
ISO 237:1975
Edition 1
International Standard
Read sample
ISO 237:1975
Published (Edition 1, 1975)
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.

ISO 237:1975

ISO 237:1975
CHF 42
Convert Swiss francs (CHF) to your currency


Applies to reamers, screwing taps, etc. It comprise two series of dimensions. The complete range of diameters is divided into a certain number of diameter steps. In the metric tables, the values of the across flats of the squares and the preferred diameters are scaled in accordance with the R20 series of preferred numbers. In the inch tables, these values are exact conversions of the corresponding metric values.

General information

  •  : Published
     : 1975-02
    : Close of review [90.60]
  •  : 1
     : 5
  • ISO/TC 29/SC 9
  • RSS updates

Life cycle

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)