according to ISO 724
The dimension system for threads is based on the nominal dimensions for thread, pitch and minor diameter.
![basic concept and nominal dimensions](https://media.bossard.com/-/media/bossard-group/website/images/engineering/technical-resources-new/en/basic-concept-and-nominal-dimensions.png?la=en-th&hash=567B8BE6EFC8DE314AAD45B77BE8B65A)
according to ISO 724
The dimension system for threads is based on the nominal dimensions for thread, pitch and minor diameter.