BS 4190:1967
Specification for ISO metric black hexagon bolts, screws and nuts
https://doi.org/10.3403/00010865 (published 30/11/1967)
BS 4190:1967 is maintained by FME/9. 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]