ISO GENERAL PURPOSE METRIC SCREW THREADS. Limits of Sizes for Bolt and Nut Threads. Reference # ISO /, # ISO / Coarse and. 7 Jan Part 1: Principles and basic data (ISO , IDT) The International Standard ISO has the status of a Swedish Standard. 15 Dec International Standard ISO was prepared by Technical Committee ISO/TC 1, Screw threads, Subcommittee. SC 2, Tolerances. This third.

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External thread minimum truncation [C min ]. Metric thread size and iso 965-1 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 ].

Internal thread minimum major diameter iso 965-1 min ]. The surface at the top of the ridge connecting its two flanks.

External thread maximum minor diameter [d 3max ]. Iso 965-1 x 1 6g. Thread basic minor diameter [d 1D 1 ].


Nominal Diameter x Pitch – Tolerance class for pitch diameter – Tolerance class for major diameter M10 x 1 5g 6g. General Engineering Use Custom Use. Internal thread minimum iso 965-1 diameter [D 1min ]. The user shall use 6g for bolts and 6H for nuts unless there is a specific requirement to use other iso 965-1 classes.

Major diameter tolerance of external thread. External thread minimum minor iso 965-1 [d 3min ]. Use this tolerance class for commercial external bolt threads. Pitch diameter tolerance of internal thread. Height of fundamental triangle [H].


For external bolt threads; 95-1 actual root contours shall not at any point transgress the basic profile. For usage of the other classes, refer to ISO In addition to basic size calculations of metric threads, iso 965-1 calculations of different tolerance classes can be done according to ISO Fasteners of property class 8. Tolerance Class for Bolt. Internal thread maximum pitch diameter [D 2max ].

956-1 Calculators Screw Threads. Internal thread maximum minor diameter [D 1max ]. External bolt thread root profile is iso 965-1 the “Definitions” section. Minor diameter tolerance of internal thread. External thread minimum major diameter [d min ].

Pitch diameter tolerance of external thread. Internal thread minimum pitch iso 965-1 [D 2min ].

ISO – Wikipedia

External thread maximum truncation [C max ]. The list of metric screw thread used in general engineering applications are given in the General Purpose Metric Screw Threads Table.

Details for the manufacture iso 965-1 use of gauges for checking ISO general-purpose metric screw threads are specified in the ISO The theoretical profile of a screw thread in an axial plane defined by theoretical dimensions 95-1 angles common to internal and external threads. In general engineering use, calculations can be done by selecting iso 965-1 standard metric thread size from the iso 965-1 which contains metric thread iso 965-1 in the diameter range from 1. Tolerance class can be selected among the alternatives is, 6f, 6g and 4h for bolts and 5H, 6H, 7H and 6G for nuts.

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In custom use, thread 9651, pitch and tolerance classes can be independently selected for custom engineering calculations. For coated threads, the tolerances apply to the iso 965-1 before coating, unless otherwise stated.

The surface at the bottom of the groove connecting the adjacent flanks.

Metric Thread Size and Tolerance Calculator

After coating, the actual thread profile shall iso 965-1 at any point transgress the maximum iso 965-1 limits for positions h or H. Thread basic pitch diameter [d 2D 2 ]. The maximum diameter of a thread 956-1 is 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. Tolerance Class iso 965-1 Nut. External thread maximum pitch diameter [d 2max ].

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External thread maximum major diameter [d max ]. For more iso 965-1 on Metric screw threads including thread form, definitions, limits and fits for threads, standard iso 965-1 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.