What is ISO 21204 about?
ISO 21204 defines a number of specification operators for the specification of extended edge transition features between features. An edge transition feature is an integral feature connecting two adjacent integral features. The extended edge transition feature includes portions of the adjacent features. All these specifications apply to any line in a defined direction in the extended edge transition feature. ISO 21204 also defines the specification modifiers and the drawing indications for such transition specifications.
The proportions and dimensions of the graphical symbols to be used are also specified. The specifications defined in this document are suitable for relatively simple edge transition functions, for example ensuring assembly without interference. For more complex...
BS EN ISO 21204:2020 history
2020BS EN ISO 21204:2020 Geometrical product specifications (GPS). Transition specification