The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the. Partie 1: Principes et donnĂ©es fondamentales. STANDARD. ISO. Fourth edition. Reference number. ISO (E). This is a free 5 page . Buy DIN ISO ISO GENERAL PURPOSE METRIC SCREW THREADS – TOLERANCES – PART 1: PRINCIPLES AND BASIC DATA.

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Internal thread minimum minor diameter [D 1min ]. In custom ieo, thread size, pitch and tolerance classes can be independently selected for custom engineering calculations. Details for the manufacture and use of gauges for checking ISO general-purpose metric screw threads are specified in the ISO Thread basic pitch diameter [d 2D 2 ].

External thread minimum minor diameter [d 3min ]. Use this tolerance class for commercial internal threads.

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Internal thread maximum pitch diameter [D 2max ]. The ixo diameter of a thread which is diameter of the root of a male thread or crest of a female thread. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.

For coated threads, the tolerances apply to the parts before coating, unless otherwise stated.


Thread basic minor diameter [d 1D 1 ]. Internal thread minimum major diameter [D min ]. If the document is revised or amended, you will be notified by email. This standard is also available to be included in Standards Subscriptions. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Proceed to Checkout Continue Shopping.

Tolerance class can be selected among the alternatives 6e, 6f, 6g and 4h for bolts and 5H, 6H, 7H and 6G for nuts. In addition to basic size calculations of metric threads, tolerance calculations of different tolerance classes can be done according to ISO Standards Subsctiption may be the perfect solution. In general engineering use, calculations can be done by selecting a standard metric thread size from the list which contains metric thread sizes in the diameter range from 1.

Fasteners of property class 8. General Engineering Use Custom Use. External thread maximum minor diameter [d 3max ].

Tolerance Class for Nut. External thread maximum pitch diameter [d 2max ]. Please first verify your email before subscribing to alerts.

Pitch diameter tolerance of internal thread.

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The tolerance system refers to the basic profile according to ISO You may delete a document from your Alert Profile at any time. Pitch diameter tolerance of external thread. External thread maximum truncation [C max ].

The theoretical profile of a screw thread in an axial plane defined by theoretical dimensions and angles common to internal and external threads.


For more information on Metric screw threads including thread form, definitions, limits and fits for threads, standard series and combinations, thread designation, basic dimensions, dimensional effect of coating, formulas and details of MJ profile, please refer to pages – of Machinery’s Handbook, 30th.

As the kso of the U.

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Need more than one copy? Height of fundamental triangle [H]. AmesWeb Calculators Screw Threads. This standard is not included in any packages. Tolerance Class for Bolt.

External thread minimum major diameter [d min ]. External thread maximum major diameter [d max ]. For usage of the other classes, refer to ISO Please first log in with a verified email before subscribing to alerts. Already Subscribed to this document. The list of metric screw thread used in general engineering applications are given in dun General Purpose Metric Screw Threads Table. Dn diameter tolerance of internal thread. Metric thread size and tolerance calculator was developed to calculate major, minor and pitch diameters of the external bolt and internal nut metric threads according to ISO External thread minimum pitch diameter [d 2min ].