What is Geometric Dimensioning and Tolerancing (GD&T)?

Geometric Dimensioning and Tolerancing (GD&T) is a system for defining and communicating engineering tolerances. It uses symbolic language on engineering drawings and models to precisely describe allowable variations in the form, size, orientation, and location of part features. GD&T ensures parts fit and function correctly, improving manufacturing quality and reducing costs by maximizing tolerances while maintaining design intent.