ASME-Y14.5M Dimensioning and Tolerancing (Correctly Numbered ASME-Y14.5)

Show Complete Document History

This document is also known as: ANSI-Y14.5, ANSI-Y14.5M, ASME-Y14.5, ANSI/ASME-Y14.5, ANSI/ASME-Y14.5M, ASME-Y14.5-2009, ASME-Y14.5M-1994

Included in this current edition are the following subparts:

 2009 EDITION - Jan. 1, 2009
 DOD ADOPTION - Feb. 9, 2009


This standard establishes uniform practices for stating and interpreting dimensioning, tolerancing, and related requirements for use on engineering drawings and in related documents.


The Y14.5 standard is considered the authoritative guideline for the design language of geometric dimensioning and tolerancing (GD&T.)  It establishes uniform practices for stating and interpreting GD&T and related requirements for use on engineering drawings and in related documents.

GD&T is an essential tool for communicating design intent — that parts from technical drawings have the desired form, fit, function and interchangeability.  By providing uniformity in drawing specifications and interpretation, GD&T reduces guesswork throughout the manufacturing process — improving quality, lowering costs, and shortening deliveries.

Now, a consensus committee of experts has revised Y14.5 for 21st-century applications.  Important changes address:  concept of feature of size; datum references and degrees of freedom; composite position tolerances; surface boundaries and axis methods of interpretation; profile tolerances; and symbology and modifiers tools.  Additionally, the subject matter has been restructured for better readability, with profile, orientation, and form now in separate sections, and material within sections reorganized.

ASME Y14.5-2009 is a replacement of ASME Y14.5M-1994.


Intended for design, drafting, mechanical, manufacturing, production, tool/gage, quality, process and project engineers, CAD/CAM/CAE specialists, inspectors and educators across a broad range of global manufacturing. Special emphasis on aerospace, automotive, medical device, precision instrumentation and related industries.

This document comes with our free Notification Service, good for the life of the document.

This document is available in Paper format.




Document Number

Y14.5 - 2009

Revision Level




Publication Date

Jan. 1, 2009

Page Count

224 pages