1 Scope
2 Normative references
3 Classes
4 Keyed three-jaw drill chucks
4.1 Dimensions
4.2 Drill chuck mounts
5 Concentricity tolerances
6 Chuck keys - Key types
7 Designation
7.1 Three-jaw drill chucks
7.2 Chuck keys
8 Marking
8.1 General
8.2 Three-jaw drill chucks
8.3 Chuck keys