Controls the shape of a feature regardless of its location or orientation. Parallelism, Perpendicularity, Angularity Controls the rotation of a feature relative to a datum. Location Position, Concentricity, Symmetry
is a foundational standard for Geometric Dimensioning and Tolerancing (GD&T) used in mechanical engineering to ensure parts are designed and manufactured with precise functional requirements. It establishes a universal symbolic language to describe a part's geometry and allowable variations, reducing ambiguity in technical drawings. Core Principles and Fundamental Rules Dimensioning and Tolerancing ASME Y14.5M-1994
Unless otherwise specified, the limits of size of an individual feature of size control both the size and the form (shape) of that feature. Controls the shape of a feature regardless of