Common GD&T Symbols

Geometric Dimensioning and Tolerancing GD&T uses symbols to represent feature characteristics and dimensions. Here is a list of the most common symbols you’ll use when writing and reading GD&T:

Geometric Category refers to whether or not the Feature Control Frame includes a Datum Reference Frame (DRF.) Tolerances for individual features do not have DRF’s. Tolerances for related features control one or more features relative to the specified DRF.

Using GD&T Geometric Dimensioning and Tolerancing

GD&T is applied using symbols and Datums. Click below to see common symbols, and to better understand Datums and Material Conditions

Where Do You Start with GD&T?

GD&T is applied using symbols and Datums. Click below to see common symbols, and to better understand Datums and Material Conditions

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