GDT Symbols

Free State

Diameter

Profile of a Surface, Profile

Flatness, Form

Straightness, Form

Total Runout, Runout

Between

Counterbore

Tangent Plane

Least Material Condition

Perpendicularity, Orientation

Profile of a Line, Profile

Angularity, Orientation

Basic Dimension, BSC

Parallelism, Orientation

Maximum Material Condition

Depth

All Around Symbol

Envelope Principle

Circularity, Form

Position, Locational

Projected Tolerance Zone

Datum Callout

Regardless of Feature Size, RFS

Cylindricity, Form

Countersink

Circular Runout, Runout

Concentricity, Locational

Symmetry, Locational

Reference, REF

Geometric Characteristic Symbol

Tolerance Zone Descriptor

Geometric Tolerance

Material Condition Symbol

Primary Datum Reference

Secondary Datum Reference

Tertiary Datum Reference