ISO is an International Organization for Standardization (ISO) standard for metric screw ISO Principles and basic data; ISO Limits of sizes for general purpose external and internal screw threads – Medium quality; ISO 3. ISO (E). INTERNATIONAL. STANDARD. ISO. Third edition. ISO general purpose metric screw threads — Tolerances —. Part 2. ISO ISO General Purpose Metric Screw Threads – Tolerances – Part 2: Limits of Sizes for General Purpose External and Internal Screw Threads – Medium.

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Internal thread minimum minor diameter [D 1min ].

Standards Subsctiption may be the perfect solution. The surface at the bottom of the groove connecting the adjacent flanks. External thread maximum truncation [C max ]. Subscription pricing is determined by: External thread maximum major diameter [d max ].

External thread maximum minor diameter [d 3max ]. Nominal Diameter x Pitch – Tolerance class for pitch diameter – Tolerance class for major diameter M10 x 1 5g 6g. Height of fundamental triangle [H]. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.

External bolt thread root profile is given the “Definitions” section. Pitch diameter tolerance of external thread. You may delete a document from your Alert Profile at any time.

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. The surface at the top of the ridge connecting its two flanks.


Internal thread minimum major diameter [D min ]. AmesWeb Calculators Screw Threads. The theoretical profile of a screw thread in an axial plane defined by theoretical dimensions and angles common to internal and external threads. Already Subscribed to this document. Thread basic minor diameter [d 1D 1 ]. Need more than isl copy?

Use this tolerance class for commercial external bolt threads. Internal thread maximum minor diameter [D 1max ]. For usage of the other classes, refer to ISO After coating, the actual thread profile shall not at any point transgress the maximum material limits for positions h or H. External thread minimum major diameter [d min ]. Please first log in with a verified email before subscribing to alerts. For external bolt threads; The actual root contours shall not at any point transgress the basic profile.

For coated threads, the tolerances apply to the parts before coating, unless otherwise stated. Proceed to Checkout Continue Shopping. External thread maximum pitch diameter [d 2max ]. Internal thread maximum pitch diameter [D 2max ].

External thread minimum truncation [C min ]. If the document is revised or amended, you will be notified by email.

Metric Thread Size and Tolerance Calculator

isp Thread basic pitch diameter [d 2D 2 ]. General Engineering Use Custom Use. 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.


Use this tolerance class for commercial internal threads. The minimum diameter of a thread which is diameter of the root of a male thread or crest of a female thread. Major diameter tolerance of external thread. Tolerance class can be selected among the alternatives 6e, 6f, 6g and 4h for bolts and 5H, 6H, 7H and 6G for nuts. Minor diameter tolerance of internal thread. M10 x 1 6g. This standard is not included in any packages.


Your Alert Profile lists the documents that will be monitored. Add to Alert PDF. Tolerance Class for Bolt. External thread minimum pitch diameter iao 2min ]. The user shall use 6g for bolts and 6H for nuts unless there is a specific requirement to use other tolerance classes.

In custom use, thread size, pitch and tolerance classes can be independently selected for custom engineering calculations.