Taiwan Provincial Standard of the People's Republic of China
Latest
CNS 4408-1987
Scope
This standard applies to the machining accuracy and tolerance of self-tapping screws. Other types of self-tapping screws can, in principle, refer to this standard.
CNS 4408-1987 history
1987CNS 4408-1987 Finish and Permissible Deviation for Tapping Screws