Translations:TechDraw Geometric dimensioning and tolerancing/73/en
Symbol | Unicode character | Modifier | Notes |
---|---|---|---|
Free state | Applies only when part is otherwise restrained | ||
Least material condition (LMC) | Useful to maintain minimum wall thickness | ||
Maximum material condition (MMC) | Provides bonus tolerance only for a feature of size | ||
Projected tolerance zone | Useful on threaded holes for long studs | ||
Regardless of feature size (RFS) | Not part of the 1994 version. See para. A5, bullet 3. Also para. D3. Also, Figure 3-8. | ||
Tangent plane | Useful for interfaces where form is not required | ||
Continuous feature | Identifies a group of features that should be treated geometrically as a single feature | ||
Statistical tolerance | Appears in the 1994 version of the standard, assumes appropriate statistical process control. | ||
Unequal bilateral | Added in the 2009 version of the standard, and refers to unequal profile distribution. Number after this symbol indicates tolerance in the "plus material" direction. |