This standard BS ISO 1641-1:2016 End mills and slot drills is classified in these ICS categories:
25.100.20 Milling tools
This part of ISO 1641 specifies the general dimensions of the following milling cutters with plain cylindrical, flatted cylindrical and threaded shanks:
end mills, flat-ended or ball-nosed — standard series and long series;
slot drills — short series and standard series.
The dimensional characteristics of cylindrical shanks are in accordance with ISO 3338‑1, ISO 3338‑2 and ISO 3338‑3.
NOTE
These same milling cutters with Morse taper shanks having a tapped hole are dealt with in ISO 1641‑2, those with 7/24 taper shanks in ISO 1641‑3.
This part of ISO 1641 does not apply to solid hard metal end mills and slot drills.