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-ro&hash=8742EC45651B45D378CFFBD1675D3C9E)
according to ISO 724
The dimension system for threads is based on the nominal dimensions for thread, pitch and minor diameter.