British Standards Document
BS ISO 4406
Hydraulic fluid power. Fluids. Method for coding the level of contamination by solid particles

https://doi.org/10.3403/30408157U

BS ISO 4406 is maintained by MCE/18/-/6. The current release of this standard is:

BS ISO 4406:2021 Hydraulic fluid power. Fluids. Method for coding the level of contamination by solid particles

https://doi.org/10.3403/30408157 (published 08/01/2021)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS ISO 4406:2017 [current until 08/01/2021]
BS ISO 4406:1999 [current until 18/09/2017]