Geometric tolerances are described by feature control frames, which are rectangular boxes on a drawing that indicate the type of geometric control, tolerance value, modifier (s) and/or datum …

GD&T Symbols Reference Guide A convenient guide for Geometric Dimensioning and Tolerancing (GD&T) symbols at your fingertips. Click on the links below to learn more about …

Dec 15, 2025 · One of the essential components of GD&T is the Feature Control Frame (FCF). This article aims to provide a practical guide to understanding Feature Control Frames in GD&T.

Learn how to read a feature control frame and download a free printable guide.

In this article, we’ll dive into what feature control frames are, why they’re vital for your engineering drawings, and how to apply them effectively.

Jul 21, 2024 · Any shape or surface may have an associated feature control frame. Typically, the frame appears below or adjacent to the feature with a leader arrow identifying the particular …

You can draw symbols that use a secondary leader to identify the datum, relative to which the tolerance is specified. However, to create such a symbol you must first create it as a symbol …

This page explains how to interpret and write tolerance indications in the feature control frame. “Learning GD&T From Scratch,” provided by KEYENCE, walks you through the basics of …

Aug 17, 2025 · Understanding a feature control frame GD&T is essential for clear communication in manufacturing. Geometric Dimensioning and Tolerancing (GD&T) provides a standardized …

Dec 9, 2014 · Geometric Symbol – This is where your geometric control is specified. See our page on GD&T symbols for a description of each symbol. Diameter Symbol (if required) – If …