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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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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 In addition to basic size calculations of metric threads, tolerance calculations of different tolerance classes can be done according to ISO 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.


Tolerance class can be selected among the alternatives 6e, 6f, 6g and 4h for bolts and 5H, 6H, 7H and 6G for nuts. 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. Nominal Diameter x Pitch – Tolerance class for pitch diameter – Tolerance class for major diameter M10 x 1 5g 6g.


M10 x 1 6g. External bolt thread root profile is given ein “Definitions” section. The list of metric screw thread used in general engineering applications are given in the General Purpose Metric Screw Threads Table. For more information on Metric screw threads including thread form, definitions, limits and fits for threads, standard series and combinations, thread designation, basic dimensions, dni effect of coating, formulas and details of MJ profile, please refer to pages – of Machinery’s Handbook, 30th.

Iso 965 Books

Use this tolerance class for commercial external bolt threads. For usage of the other classes, refer to ISO Use this tolerance class for commercial internal threads. For coated threads, the tolerances apply to the parts before coating, unless otherwise stated. After coating, the actual thread profile shall not at any point transgress the maximum material limits for positions h or H.

For external bolt threads; The actual root contours shall not at any point isoo the basic profile.

Fasteners of property class 8. The theoretical profile of a screw thread in an axial plane defined by theoretical dimensions and angles common to internal and external threads. The surface at the top of the ridge connecting its two flanks.

Details for the manufacture and use of gauges for checking ISO general-purpose metric screw threads are specified in the ISO The maximum diameter of a thread which ido diameter of the crest of a male thread or root of a female thread. The minimum diameter of a thread which is diameter of the root of a male thread or crest of a female thread.


The surface at the bottom of the groove connecting the adjacent flanks. AmesWeb Calculators Screw Threads. General Engineering Use Custom Use. Tolerance Class for Bolt. Tolerance Class for Nut. Height of fundamental triangle [H].

Thread basic izo diameter [d 2D 2 ]. Thread basic minor diameter [d 1D 1 ]. External thread minimum truncation [C min ]. External thread maximum truncation [C max ].

Metric Thread Size and Tolerance Calculator

External thread maximum major diameter [d max ]. External thread minimum major diameter [d min ]. External thread maximum pitch diameter [d 2max ]. External thread minimum pitch diameter [d 2min ]. External thread maximum minor diameter [d 3max ].

External thread minimum minor diameter [d 3min ]. Internal thread minimum major diameter [D min ]. Internal thread maximum dib diameter [D 2max ].

ISO – Wikipedia

Internal thread minimum pitch diameter [D 2min ]. Internal thread maximum minor diameter [D 1max ]. Internal thread minimum minor diameter [D 1min ]. Major diameter tolerance of external thread. Pitch diameter tolerance of external thread. Minor diameter tolerance of internal thread.

Pitch diameter tolerance of internal thread.