British Standards Document
BS 4190
ISO metric black hexagon bolts, screws and nuts. Specification

https://doi.org/10.3403/30283395U

BS 4190 is maintained by FME/9. The current release of this standard is:

BS 4190:2014 ISO metric black hexagon bolts, screws and nuts. Specification

https://doi.org/10.3403/30283395 (published 31/10/2014)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS 4190:2001 [current until 31/10/2014]
BS 4190:1967 [current until 15/02/2001]