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ISO 965 (ISO general purpose metric screw thread—tolerances) is an International Organization for Standardization (ISO) standard for metric screw thread tolerances.[1] It specifies the basic profile for ISO general purpose metric screw threads (M) conforming to ISO 261.[2]The tolerance system refers to the basic profile in accordance with ISO 68-1. The Field of application and purpose of ISO 965 can be defined as "ISO 965 specifies a tolerance system for screw threads from 1mm diameter upwards.[3] Thread tolerancesLimits for Metric (standard) Coarse Threads According To ISO 965.[4] Thread size | Engagement length | Major diameter(d) | Pitch diameter(d2) | in mm | from | to | max. | min. | max. | min. |
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M1 | 0,6 | 1,7 | 1,000 | 0,933 | 0,838 | 0,785 |
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M1.1 | 0,6 | 1,7 | 1,100 | 1,033 | 0,938 | 0,885 |
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M1.2 | 0,6 | 1,7 | 1,200 | 1,133 | 1,038 | 0,985 |
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M1.4 | 0,7 | 2 | 1,400 | 1,325 | 1,205 | 1,149 |
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M1.6 | 0,8 | 2,6 | 1,581 | 1,496 | 1,354 | 1,291 |
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M1.8 | 0,8 | 2,6 | 1,781 | 1,696 | 1,554 | 1,491 |
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M2 | 1 | 3 | 1,981 | 1,886 | 1,721 | 1,654 |
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M2.2 | 1,3 | 3,8 | 2,180 | 2,080 | 1,888 | 1,817 |
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M2.5 | 1,3 | 3,8 | 2,480 | 2,380 | 2,118 | 2,117 |
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M3 | 1,5 | 4,5 | 2,980 | 2,874 | 2,655 | 2,580 |
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M3.5 | 1,7 | 5 | 3,479 | 3,354 | 3,089 | 3,004 |
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M4 | 2 | 6 | 3,978 | 3,838 | 3,523 | 3,433 |
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M5 | 2,5 | 7,5 | 4,976 | 4,826 | 4,456 | 4,361 |
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M6 | 3 | 12 | 5,974 | 5,794 | 5,324 | 5,212 |
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M7 | 3 | 3 | 6,974 | 6,794 | 6,324 | 6,212 |
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M8 | 4 | 12 | 7,972 | 7,760 | 7,160 | 7,042 |
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M10 | 5 | 15 | 9,968 | 9,732 | 8,994 | 8,862 |
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M12 | 6 | 18 | 11,966 | 11,701 | 10,829 | 10,679 |
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M14 | 8 | 24 | 13,962 | 13,682 | 12,663 | 12,503 |
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M16 | 8 | 24 | 15,962 | 15,682 | 14,663 | 14,503 |
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M18 | 10 | 30 | 17,958 | 17,623 | 16,334 | 16,164 |
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M20 | 10 | 30 | 19,958 | 19,623 | 18,334 | 18,164 |
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M22 | 10 | 30 | 21,958 | 21,623 | 20,334 | 20,164 |
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M24 | 12 | 36 | 23,952 | 23,577 | 22,003 | 21,803 |
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M27 | 12 | 36 | 26,952 | 26,577 | 25,003 | 24,803 |
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M30 | 15 | 45 | 29,947 | 29,522 | 27,674 | 27,462 |
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M33 | 15 | 45 | 32,947 | 32,522 | 30,674 | 30,462 |
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M36 | 18 | 53 | 35,940 | 35,465 | 33,342 | 33,118 |
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M39 | 18 | 53 | 38,940 | 38,465 | 36,342 | 36,118 |
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- Limits For Metric Fine Threads According To ISO 965
Thread Size | Engagement length | Major diameter | Pitch diameter |
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in mm | from | to | max. | min. | max. | min. |
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M8x1 | 3 | 9 | 7,974 | 7,794 | 7,324 | 7,212 |
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M10x1.25 | 4 | 12 | 9,972 | 9,760 | 9,160 | 9,042 |
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M12x1.25 | 4,5 | 13 | 11,972 | 11,760 | 11,160 | 11,028 |
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M14x1.5 | 5,6 | 16 | 13,968 | 13,732 | 12,994 | 12,854 |
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M16x1.5 | 5,6 | 16 | 15,968 | 15,732 | 14,994 | 14,854 |
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M18x1.5 | 5,6 | 16 | 17,968 | 17,732 | 16,994 | 16,854 |
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M20x1.5 | 5,6 | 16 | 19,968 | 19,732 | 18,994 | 18,854 |
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M22x1.5 | 5,6 | 16 | 21,968 | 21,732 | 20,994 | 20,854 |
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M24x2 | 8,5 | 25 | 23,962 | 23,682 | 22,663 | 22,493 |
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M27x2 | 8,5 | 25 | 26,962 | 26,682 | 25,663 | 25,493 |
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M30x2 | 8,5 | 25 | 29,962 | 29,682 | 28,663 | 28,493 |
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M33x2 | 8,5 | 25 | 32,962 | 32,682 | 31,663 | 31,493 |
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M36x3 | 12 | 36 | 35,952 | 35,577 | 34,003 | 33,803 |
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M39x3 | 12 | 36 | 38,952 | 38,577 | 37,003 | 36,803 |
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Parts The standard consists of the following parts: - ISO 965-1 Principles and basic data
- ISO 965-2 Limits of sizes for general purpose external and internal screw threads – Medium quality
- ISO 965-3 Deviations for constructional screw threads
- ISO 965-4 Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing
- ISO 965-5 Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing
References1. ^{{cite web|url=http://www.iso.org/iso/home/store/catalogue_ics/catalogue_detail_ics.htm?csnumber=57778|title=ISO general purpose metric screw threads -- Tolerances -- Part 1: Principles and basic data|publisher=International Organization for Standardization|date=13 September 2013|access-date=10 January 2017}} 2. ^Malaysian Standard, Sectorial Catalogue, Mechanical Systems & Components-Source-Government of Malaysia 3. ^[https://books.google.com/books?id=qq3IdWd1vQkC&pg=PA22&lpg=PA22&dq=ISO+965+application&source=bl&ots=vVCPraTAXg&sig=C_e9tk6AtzFWeg1Yl2hgvCMT7RA&hl=en&ei=Q2VzTPb2CIPuvQO_v7XaDg&sa=X&oi=book_result&ct=result&resnum=10&ved=0CEIQ6AEwCTge#v=onepage&q=ISO%20965&f=false] ISO 965 Application as described in the Book "Transactions of Technical Conference on Metric Mechanical Fasteners, Part 3"-Source-Google Books-Published by American National Standards Institute Inc, New york 4. ^ Limits for Metric (standard) Coarse Threads according to ISO 965
{{ISO standards}} 2 : ISO standards|Screws |