1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS A 358
2、-2:2000 ISO 5855-2:1999 ICS 49.030.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW MJ threads Part 2: Limit dimensions for bolts and nutsThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of
3、 the Standards Committee and comes into effect on 15 January 2000 BSI 01-2000 ISBN 0 580 34018 X BS A 358-2:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 5855-2:1999 and implements it as the UK national standard. It su
4、persedes BS 6293-2:1994 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening systems (International), which has the responsibility to: aid enquir
5、ers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations rep
6、resented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Corres
7、pondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not
8、 of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, page ii, pages 1 to 6, and inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was las
9、t issued.A Referencenumbe r ISO58552:1999 (E) INTERNATIONAL STANDARD ISO 58552 Thirdedition 19991015 AerospaceMJthreads Part2: Limitdimensionsforboltsandnuts AronautiqueetespaceFiletageMJ Partie2:Dimensionslimitespourvisetcrous BS A 358-2:2000)E(9991:25585OSI ii Foreword ISO (the InternationalOrgani
10、zationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommit
11、tee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDire
12、ctives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtoth ememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO 58552waspreparedbyTechnica lCommitteeISO/TC 20,Aircraftandspaceveh
13、icles , SubcommitteeSC4, Aerospacefastenersystems . Thisthirdeditioncancelsandreplacesthesecondedition(ISO 58552:1988),o fwhichitconstitutesatechnical revision. ISO5855consistsofthefollowingparts,underthegeneraltitle AerospaceMJthreads : Part1:Generalrequirements Part2:Limitdimensionsforboltsandnuts
14、 Part3:Limitdimensionsforfittingsforfluidsystems BS A 358-2:2000DRADNATSLANOITANRETNI OSI )E(9991:25585OSI 1 AerospaceMJthreads Part2: Limitdimensionsforboltsandnuts 1Scope ThispartofISO5855specifieslimitdimensionsofMJthreadsforboltsandnutsofnominaldiameter1,6mmto 39mmforaerospaceconstruction. 2Norm
15、ative references Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthis partofISO5855.Fordatedreferences,subs equentamendmentsto,orrevisionsof,anyofthesepublicationsdonot apply.However,partiestoagreementsbasedonthispartofISO 5855areencour agedtoinv
16、estigatethepossibilityof applyingthemostrecenteditionofthenormativedocumentsindicatedbelow.Forundatedreferences,thelatestedition ofthenormativedocumentreferredtoapplies.MembersofISOandIECmaintainregistersofcurrentlyvalid InternationalStandards. ISO9651:1998, ISOgeneralpurposemetricscrewthreadsTolera
17、ncesPart1:Principlesandbasicdata. ISO58551:1999, AerospaceMJthreadsPart1:Generalrequirements. 3 Nominaldiametersandpitches SeeTable1. Table1Nominaldiametersandpitches Dimensionsinmillimetres Nominaldiameter d or D Pitch P Nominaldiameter d or D Pitch P 1,6 0,35 14 2 0,4 16 2,5 0,45 18 1,5 3 0,5 20 3
18、,5 0,6 22 4 0,7 24 5 0,8 27 63 0 2 713 3 83 6 10 1,25 39 12 BS A 358-2:2000)E(9991:25585OSI OSI 2 4Tolerance classes SeeTable2. Table2Toleranceclasses Boltthreads Nutthreads d 6h D 1 6Hfornominaldiameter 6mm d 2 4h D 2 4H 5 Provisionsforcoatedthreads Beforecoating,thedimensionsofthethreadsshallbecom
19、patiblewiththethicknessofthecoatingselectedand withthelimitdimensionsforfinishedpartsspecifiedinclause6. 6 Limitdimensionsforfinishedparts(coatedoruncoated) 6.1Bolt threads Figure1illustratesthepositionandtheformofthelimitprofiles(maximumandminimum)inrelationtothebasic profile(seeISO58551). Tables3a
20、nd4specifythelimitdimensions. a Pitch D P b Basicandmaximumprofiles c Basicprofile d Minimumprofile Figure1Limitprofilesforboltthreads BS A 358-2:2000OSI )E(9991:25585OSI 3 Table3Limitdimensionsfor4h6hthreadsforbolts Dimensionsinmillimetres Majordiameter d Pitchdiameter d 2 Minordiameter d 3 Threadd
21、esignation T d T d2 T d3 max. min. (6h) a max. min. (4h) a max. min. MJ1,6 0,354h6h 1,600 1,515 0,085 1,373 1,333 0,04 1,196 1,135 0,061 MJ2 0,44h6h 2,000 1,905 0,095 1,740 1,698 0,042 1,538 1,472 0,066 MJ2,5 0,454h6h 2,5 2,4 0,1 2,208 2,163 0,045 1,980 1,908 0,072 MJ3 0,54h6h 3,000 2,894 0,106 2,67
22、5 2,627 0,048 2,423 2,345 0,078 MJ3,5 0,64h6h 3,500 3,375 0,125 3,110 3,057 0,053 2,807 2,718 0,089 MJ4 0,74h6h 4,00 3,86 0,14 3,545 3,489 0,056 3,192 3,094 0,098 MJ5 0,84h6h 5,00 4,85 0,15 4,48 4,42 0,06 4,076 3,968 0,108 MJ6 14h6h 6,00 5,82 0,18 5,350 5,279 0,071 4,845 4,713 0,132 MJ7 14h6h 7,00 6
23、,82 0,18 6,350 6,279 0,071 5,845 5,713 0,132 MJ8 14h6h 8,00 7,82 0,18 7,350 7,279 0,071 6,845 6,713 0,132 MJ10 1,254h6h 10,000 9,788 0,212 9,188 9,113 0,075 8,557 8,406 0,151 MJ12 1,254h6h 12,000 11,788 0,212 11,188 11,103 0,085 10,557 10,396 0,161 MJ14 1,54h6h 14,000 13,764 0,236 13,026 12,936 0,09
24、 12,268 12,087 0,181 MJ16 1,54h6h 16,000 15,764 0,236 15,026 14,936 0,09 14,268 14,087 0,181 MJ18 1,54h6h 18,000 17,764 0,236 17,026 16,936 0,09 16,268 16,087 0,181 MJ20 1,54h6h 20,000 19,764 0,236 19,026 18,936 0,09 18,268 18,087 0,181 MJ22 1,54h6h 22,000 21,764 0,236 21,026 20,936 0,09 20,268 20,0
25、87 0,181 MJ24 24h6h 24,00 23,72 0,28 22,701 22,595 0,106 21,691 21,464 0,227 MJ27 24h6h 27,00 26,72 0,28 25,701 25,595 0,106 24,691 24,464 0,227 MJ30 24h6h 30,00 29,72 0,28 28,701 28,595 0,106 27,691 27,464 0,227 MJ33 24h6h 33,00 32,72 0,28 31,701 31,595 0,106 30,691 30,464 0,227 MJ36 24h6h 36,00 35
26、,72 0,28 34,701 34,595 0,106 33,691 33,464 0,227 MJ39 24h6h 39,00 38,72 0,28 37,701 37,595 0,106 36,691 36,464 0,227 a InaccordancewithISO9651 Table4Rootradiiforboltthreads Dimensionsinmillimetres Pitch P Rootradius R max. min. 0,35 0,063 0,053 0,4 0,072 0,060 0,45 0,081 0,068 0,5 0,090 0,075 0,6 0,
27、108 0,090 0,7 0,126 0,105 0,8 0,144 0,120 1 0,18 0,15 1,25 0,226 0,188 1,5 0,271 0,225 2 0,361 0,300 BS A 358-2:2000)E(9991:25585OSI OSI 4 6.2Nut threads Figure2illustratesthepositionandtheformofthelimitprofiles(maximumandminimum)inrelationtothebasic profile(seeISO58551). Table5specifiesthelimitdime
28、nsions. a Pitch D P b Basicprofile c Maximumprofile d Basicandminimumprofiles Figure2Limitprofilesfornutthreads BS A 358-2:2000OSI )E(9991:25585OSI 5 Table5Limitdimensionsof4H6HthreadsfornutsofdiameterMJ1,6toMJ5 andlimitdimensionsof4H5HthreadsfornutsofdiameterMJ6toMJ39 Dimensionsinmillimetres Thread
29、designation Major Pitchdiameter Minordiameter D 3 a D 2 D 1 T D2 T D1 max. max. min. (4H) b max. min. (6H) b (5H) b MJ1,6 0,354H6H 1,704 1,426 1,373 0,053 1,359 1,259 0,1 MJ2 0,44H6H 2,114 1,796 1,740 0,056 1,722 1,610 0,112 MJ2,5 0,454H6H 2,625 2,268 2,208 0,06 2,187 2,062 0,125 MJ3 0,54H6H 3,135 2
30、,738 2,675 0,063 2,653 2,513 0,14 MJ3,5 0,64H6H 3,658 3,181 3,110 0,071 3,075 2,915 0,16 MJ4 0,74H6H 4,176 3,620 3,545 0,075 3,498 3,318 0,18 MJ5 0,84H6H 5,195 4,56 4,48 0,08 4,421 4,221 0,2 MJ6 14H5H 6,239 5,445 5,350 0,095 5,216 5,026 0,19 MJ7 14H5H 7,239 6,445 6,350 0,095 6,216 6,026 0,19 MJ8 14H
31、5H 8,239 7,445 7,350 0,095 7,216 7,026 0,19 MJ10 1,254H5H 10,28 9,288 9,188 0,1 8,994 8,782 0,212 MJ12 1,254H5H 12,292 11,300 11,188 0,112 10,994 10,782 0,212 MJ14 1,54H5H 14,335 13,144 13,026 0,118 12,775 12,539 0,236 MJ16 1,54H5H 16,335 15,144 15,026 0,118 14,775 14,539 0,236 MJ18 1,54H5H 18,335 1
32、7,144 17,026 0,118 16,775 16,539 0,236 MJ20 1,54H5H 20,335 19,144 19,026 0,118 18,775 18,539 0,236 MJ22 1,54H5H 22,335 21,144 21,026 0,118 20,775 20,539 0,236 MJ24 24H5H 24,429 22,841 22,701 0,14 22,351 22,051 0,3 MJ27 24H5H 27,429 25,841 25,701 0,14 25,351 25,051 0,3 MJ30 24H5H 30,429 28,841 28,701
33、 0,14 28,351 28,051 0,3 MJ33 24H5H 33,429 31,841 31,701 0,14 31,351 31,051 0,3 MJ36 24H5H 36,429 34,841 34,701 0,14 34,351 34,051 0,3 MJ39 24H5H 39,429 37,841 37,701 0,14 37,351 37,051 0,3 a D 3 min.isnotspecified.However,itshallbegreaterthan D(seeFigure2). b InaccordancewithISO9651 6.3 Maximumpermi
34、ssibledeviationsonpitch(lead)andonhalfflankangle ValuesgiveninTable6havebeentakenfromTable6ofISO58551. BS A 358-2:2000)E(9991:25585OSI OSI 6 Table6Maximumpermissibledeviationsonpitch(lead)andonhalfflankangle Nominaldiameter Pitch Boltthread Nutthread d orDP DP Da DP Da mm mm mm mm 1,6 0,35 9,2 1 45
35、12,2 2 19 2 0,4 9,7 1 37 12,9 2 8 2,5 0,45 10,4 1 32 13,9 2 2 3 0,5 11,1 1 28 14,5 1 55 3,5 0,6 12,2 1 21 16,4 1 48 4 0,7 12,9 1 13 17,3 1 38 5 0,8 13,9 1 9 18,5 1 32 678 1 16,4 1 5 21,9 1 27 10 1,25 17,3 0 55 23,1 1 13 12 1,25 19,6 1 2 25,9 1 22 14 16 18 20 22 - - 1,5 20,8 0 55 27,2 1 12 24 27 30 3
36、3 36 39 - - 2 24,5 0 49 32,3 1 4 BS A 358-2:2000BS A 358-2:2000 ISO 5855-2:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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