British Standards Document
BS ISO 261
ISO general purpose metric screw threads. General plan

https://doi.org/10.3403/01677361U

BS ISO 261 is maintained by FME/9. The current release of this standard is:

BS ISO 261:1998 ISO general purpose metric screw threads. General plan

https://doi.org/10.3403/01677361 (published 15/04/1999)

This standard is available from the following sources:

Other historical versions of this standard document also exist: