ASME Y14.5


Dimensioning and Tolerancing

Published by Publication Date Number of Pages
ASME 02/11/2019 347


ASME Y14.5 – Dimensioning and Tolerancing

This Standard establishes symbols, rules, definitions, requirements, defaults, and recommended practices for stating and interpreting dimensioning, tolerancing, and related requirements for use on engineering drawings, models defined in digital data files, and related documents. For a mathematical explanation of many of the principles in this Standard, see ASME Y14.5.1M. Additional uniform practices for applying dimensions, tolerances, and related requirements in digital data sets are defined in ASME Y14.41. Practices unique to architectural and civil engineering and welding symbology are not included in ASME Y14.5.


Sections 1 through 4 establish related references, definitions, fundamental rules, and practices for general dimensioning. For tolerancing practices, see Sections 5 through 12. Additional information about tolerancing is in Mandatory Appendix I and Nonmandatory Appendices A through D.

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