1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS A 358
2、-3:2000 ISO 5855-3:1999 ICS 49.030.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW MJ threads Part 3: Limit dimensions for fittings for fluid systemsThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the
3、authority of the Standards Committee and comes into effect on 15 January 2000 BSI 01-2000 ISBN 0 580 34017 1 BS A 358-3:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 5855-3:1999 and implements it as the UK national sta
4、ndard. It supersedes BS 6293-3:1994 which is withdrawn.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
5、: aid enquirers 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 organ
6、izations represented 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 Stan
7、dards Correspondence 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 Stand
8、ard does not 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, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the docum
9、ent was last issued.A Referencenumbe r ISO58553:1999 (E) INTERNATIONAL STANDARD ISO 58553 Secondedition 19991015 AerospaceMJthreads Part3: Limitdimensionsforfittingsforfluidsystems AronautiqueetespaceFiletageMJ Partie3:Dimensionslimitespourraccordementsdesystmesdefluides BS A 358-3:2000)E(9991:35585
10、OSI ii Foreword ISO (the InternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestabl
11、ishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedi
12、naccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtoth ememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO 58553waspreparedbyTech
13、nica lCommitteeISO/TC 20,Aircraftandspacevehicles , SubcommitteeSC4, Aerospacefastenersystems . Thissecondeditioncancelsandreplacesthefirstedition(ISO 58553:1988),ofwhichitconstitutes atechnical revision. ISO5855consistsofthefollowingparts,underthegeneraltitle AerospaceMJthreads : Part1:Generalrequi
14、rements Part2:Limitdimensionsforboltsandnuts Part3:Limitdimensionsforfittingsforfluidsystems BS A 358-3:2000DRADNATSLANOITANRETNI OSI )E(9991:35585OSI 1 AerospaceMJthreads Part3: Limitdimensionsforfittingsforfluidsystems 1Scope ThispartofISO5855specifieslimitdimensionsofMJthreadsforfluidsystemsfitti
15、ngsforaerospaceconstruction. 2Normative references Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthis partofISO5855.Fordatedreferences,subs equentamendmentsto,orrevisionsof,anyofthesepublicationsdonot apply.However,partiestoagreementsbasedonthi
16、spartofISO 5855areencour agedtoinvestigatethepossibilityof applyingthemostrecenteditionofthenormativedocumentsindicatedbelow.Forundatedreferences,thelatestedition ofthenormativedocumentreferredtoapplies.MembersofISOandIECmaintainregistersofcurrentlyvalid InternationalStandards. ISO9651:1998, ISOgene
17、ralpurposemetricscrewthreadsTolerancesPart1:Principlesandbasicdata. ISO58551:1999, AerospaceMJthreadsPart1:Generalrequirements. 3 Nominaldiametersandpitches SeeTable1. Table1Nominaldiametersandpitches Dimensionsinmillimetres Nominaldiameter d or D Pitch P Nominaldiameter d or D Pitch P 812 7 10 30 1
18、2 1,25 33 1,5 14 36 16 39 18 1,5 42 20 48 2 22 50 24 BS A 358-3:2000)E(9991:35585OSI OSI 2 4Tolerance classes SeeTable2. Table2Toleranceclasses Assembly Externalthreads Internalthreads Generalcase(clearance d 6h D 1 5H maybenil) d 2 4h D 2 4H Requiringsystematic d 6g D 1 5H clearance d 2 4g D 2 4H 5
19、 Provisionsforcoatedthreads Beforecoating,thedimensionsofthethreadsshallbecompatiblewiththethicknessofthecoatingselectedand withthelimitdimensionsforfinishedpartsspecifiedinclause6. 6 Limitdimensionsforfinishedparts(coatedoruncoated) 6.1External threads 6.1.1 4h6hexternalthreads Figure1illustratesth
20、epositionandtheformofthelimitprofiles(maximumandminimum)inrelationtothebasic profile(seeISO58551). Tables3and4specifythelimitdimensions. a Pitch D P b Basicandmaximumprofiles c Basicprofile d Minimumprofile Figure1Limitprofilesforexternalthreads (clearancemaybenil) BS A 358-3:2000OSI )E(9991:35585OS
21、I 3 Table3Limitdimensionsfor4h6hexternalthreads Dimensionsinmillimetres Threaddesignation Majordiameter d Pitchdiameter d 2 Minordiameter d 3 T d T d2 T d3 max. min. (6h) a max. min. (4h) a max. min. MJ8 14h6h 8,00 7,82 0,18 7,350 7,279 0,071 6,845 6,713 0,132 MJ10 14h6h 10,00 9,82 0,18 9,350 9,279
22、0,071 8,845 8,713 0,132 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 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
23、 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 20,087 0,181 MJ24 1,54h6h 24,000 23,764 0,236 23,026 22,931 0,095 22,268 22,082 0,186 MJ27 1,54h6h 27,000 26,764 0,236 26,026 25,931 0,095 25,268 25,082 0,
24、186 MJ30 1,54h6h 30,000 29,764 0,236 29,026 28,931 0,095 28,268 28,082 0,186 MJ33 1,54h6h 33,000 32,764 0,236 32,026 31,931 0,095 31,268 31,082 0,186 MJ36 1,54h6h 36,000 35,764 0,236 35,026 34,931 0,095 34,268 34,082 0,186 MJ39 1,54h6h 39,000 38,764 0,236 38,026 37,931 0,095 37,268 37,082 0,186 MJ42
25、 24h6h 42,00 41,72 0,28 40,701 40,595 0,106 39,691 39,463 0,228 MJ48 24h6h 48,00 47,72 0,28 46,701 46,589 0,112 45,691 45,457 0,234 MJ50 24h6h 50,00 49,72 0,28 48,701 48,589 0,112 47,691 47,457 0,234 a InaccordancewithISO9651 Table4Rootradiiforexternalthreads Dimensionsinmillimetres Pitch P Rootradi
26、us R max. min. 1 0,18 0,15 1,25 0,226 0,188 1,5 0,271 0,225 2 0,361 0,300 6.1.2 4g6gexternalthreads Figure2illustratesthepositionandtheformofthelimitprofiles(maximumandminimum)inrelationtothebasic profile(seeISO58551). Tables4and5specifythelimitdimensions. BS A 358-3:2000)E(9991:35585OSI OSI 4 a Pit
27、ch D P b Basicprofile c Maximumprofile d Minimumprofile e es isthebasicupperdeviation,seeISO9651 Figure2Limitprofilesforexternalthreads (systematicclearance) Table5Limitdimensionsfor4g6gexternalthreads Dimensionsinmillimetres Threaddesignation Majordiameter d Pitchdiameter d 2 Minordiameter d 3 T d
28、T d2 T d3 max. min. (6g) a max. min. (4g) a max. min. MJ8 14g6g 7,974 7,794 0,18 7,324 7,253 0,071 6,819 6,687 0,132 MJ10 14g6g 9,974 9,794 0,18 9,324 9,253 0,071 8,819 8,687 0,132 MJ12 1,254g6g 11,972 11,760 0,212 11,160 11,075 0,085 10,529 10,368 0,161 MJ14 1,54g6g 13,968 13,732 0,236 12,994 12,90
29、4 0,09 12,236 12,055 0,181 MJ16 1,54g6g 15,968 15,732 0,236 14,994 14,904 0,09 14,236 14,055 0,181 MJ18 1,54g6g 17,968 17,732 0,236 16,994 16,904 0,09 16,236 16,055 0,181 MJ20 1,54g6g 19,968 19,732 0,236 18,994 18,904 0,09 18,236 18,055 0,181 MJ22 1,54g6g 21,968 21,732 0,236 20,994 20,904 0,09 20,23
30、6 20,055 0,181 MJ24 1,54g6g 23,968 23,732 0,236 22,994 22,899 0,095 22,236 22,050 0,186 MJ27 1,54g6g 26,968 26,732 0,236 25,994 25,899 0,095 25,236 25,050 0,186 MJ30 1,54g6g 29,968 29,732 0,236 28,994 28,899 0,095 28,236 28,050 0,186 MJ33 1,54g6g 32,968 32,732 0,236 31,994 31,899 0,095 31,236 31,050
31、 0,186 MJ36 1,54g6g 35,968 35,732 0,236 34,994 34,899 0,095 34,236 34,050 0,186 MJ39 1,54g6g 38,968 38,732 0,236 37,994 37,899 0,095 37,236 37,050 0,186 MJ42 24g6g 41,962 41,682 0,28 40,663 40,557 0,106 39,653 39,425 0,228 MJ48 24g6g 47,962 47,682 0,28 46,663 46,551 0,112 45,653 45,419 0,234 MJ50 24
32、g6g 49,962 49,682 0,28 48,663 48,551 0,112 47,653 47,419 0,234 a InaccordancewithISO9651 BS A 358-3:2000OSI )E(9991:35585OSI 5 6.2Internal threads Figure3illustratesthepositionandtheformofthelimitprofiles(maximumandminimum)inrelationtothebasic profile(seeISO58551). Table6specifiesthelimitdimensions.
33、 a Pitch D P b Basicprofile c Maximumprofile d Basicandminimumprofiles Figure3 Limitprofilesforinternalthreads BS A 358-3:2000)E(9991:35585OSI OSI 6 Table6Limitdimensionsfor4H5Hinternalthreads Dimensionsinmillimetres Major diameter Pitchdiameter Minordiameter Thread D 3 a D 2 D 1 designation T D2 T
34、D1 max. max. min. (4H) b max. min. (5H) b MJ8 14H5H 8,239 7,445 7,350 0,095 7,216 7,026 0,19 MJ10 14H5H 10,239 9,445 9,350 0,095 9,216 9,026 0,19 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
35、 0,118 14,775 14,539 0,236 MJ18 1,54H5H 18,335 17,144 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 1,54H5H 24,342 23,151 23,026 0,125 22,775 22,539 0,236 MJ27 1,54H5H 27,342 26,151 26,026
36、 0,125 25,775 25,539 0,236 MJ30 1,54H5H 30,342 29,151 29,026 0,125 28,775 28,539 0,236 MJ33 1,54H5H 33,342 32,151 32,026 0,125 31,775 31,539 0,236 MJ36 1,54H5H 36,342 35,151 35,026 0,125 34,775 34,539 0,236 MJ39 1,54H5H 39,342 38,151 38,026 0,125 37,775 37,539 0,236 MJ42 24H5H 42,429 40,841 40,701 0
37、,14 40,351 40,051 0,3 MJ48 24H5H 48,439 46,851 46,701 0,15 46,351 46,051 0,3 MJ50 24H5H 50,439 48,851 48,701 0,15 48,351 48,051 0,3 a D 3 min.isnotspecified.However,itshallbegreaterthan D(seeFigure3). b InaccordancewithISO9651 6.3 Maximumpermissibledeviationsonpitch(lead)andonhalfflankangle Valuesgi
38、veninTable7havebeentakenfromTable6ofISO58551:1999. Table7Maximumpermissibledeviationsonpitch(lead)andonhalfflankangle Nominaldiameter Pitch Externalthread Internalthread d or D P DP Da DP Da mm mm mm mm 8 1 16,4 1 5 21,9 1 27 10 12 1,25 19,6 1 2 25,9 1 22 14 16 18 20,8 0 55 27,3 1 12 20 22 24 1,5 27
39、 30 21,9 0 58 28,9 1 16 33 36 39 42 24,5 0 49 32,3 1 4 48 2 25,9 0 51 34,6 1 8 50 BS A 358-3:2000BS A 358-3:2000 ISO 5855-3:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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