The Fundamentals of GD&T Reference Book is a comprehensive guide for understanding and applying Geometric Dimensioning and Tolerancing (GD&T). This book serves as an essential resource for design engineers, manufacturers and  Quality Inspectors who want to accurately communicate design intent and ensure proper assembly and functionality of mechanical parts and assemblies. It covers the basic principles of GD&T, such as datums, form controls, orientation controls, position controls, and profile controls. The book includes clear explanations, practical examples, and illustrations to help readers grasp the concepts and apply GD&T effectively. Whether you are new to GD&T or looking to enhance your knowledge and skills, this reference book is an invaluable tool that will improve the quality and reliability of your designs and manufacturing processes.