Projected tolerance zone

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Projected tolerance zone symbol (used in a feature control frame)

In geometric dimensioning and tolerancing, a projected tolerance zone is defined to predict the final dimensions and locations of features on a component or assembly subject to tolerance stack-up.


  • ASME Y14.5M-1994 Dimensioning and Tolerancing

American Society of Mechanical Engineers 14 stands for number of GD&T symbols Y and M don't know