1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS A 359
2、:2000 ISO 12278:1999 ICS 49.030.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Nuts, barrel, self-locking, floating, with MJ threads, classifications: 900 MPa (at ambient temperature)/2358C, 1100 MPa (at ambient temperature)/2358C, 1250 MPa (at ambient temperature)/2358C,
3、1550 MPa (at ambient temperature)/2358C DimensionsThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2000 BSI 03-2000 ISBN 0 580 34422 3 BS A 359:2000 Amen
4、dments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 12278:1999 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening syst
5、ems to Subcommitte ACE/12/1, Aerospace fasteners and fastening systems (Inernational), which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European Subcommittee any enquiries on the interpretation, or proposals for change, and keep the UK i
6、nterests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to i
7、n this document may be found in the BSI Standards Catalogue under the section entitled “International Standards 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.
8、 Users of British Standards are responsible for their correct application. Compliance with a British Standard 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, pages ii and iii, a blank page,
9、pages 1 to 3 and a back cover. The BSI copyright notice displayed throughout this document indicates when the document was last issued.A Referencenumbe r ISO12278:1999 (E) INTERNATIONAL STANDARD ISO 12278 Firstedition 19991101 AerospaceNuts,barrel,selflocking, floating,selfaligning,withMJthreads, cl
10、assifications:900MPa(atambient temperature)/235C,1100MPa(atambient temperature)/235C,1250MPa(atambient temperature)/235Cand1550MPa(at ambienttemperature)/235C Dimensions Aronautiqueetespacecrousportecylindrique,freinageinterne, flottants,orientables,filetageMJ,classifications:900MPa(temprature ambia
11、nte)/235C,1100MPa(tempratureambiante)/235C, 1250MPa(tempratureambiante)/235Cet1550MPa (tempratureambiante)/235CDimensions BS A 359:2000ii Foreword ISO (the InternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalSta
12、ndardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselyw
13、iththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtoth ememberbodiesforvoting. Publication
14、asanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO 12278waspreparedbyTechnicalCommitteeISO/TC 20,Aircraftandspacevehicles , SubcommitteeSC4, Aerospacefastenersystems . BS A 359:2000iii Introduction ThedimensionsspecifiedinthisInternationalSta
15、ndardhavebee ndeterminedtoallowproductionofapartwhich willsatisfytherequirementsoftheprocurementspecificationISO 5858:1999,AerospaceSelflockingnutswith maximumoperatingtemperaturelessthanorequalto425CProcurementspecification . BS A 359:2000BS A 359:2000DRADNATSLANOITANRETNI OSI )E(9991:87221OSI 1 Ae
16、rospaceNuts,barrel,selflocking,floating,selfaligning,with MJthreads,classifications: 900MPa(atambienttemperature)/235C,1100MPa(atambient temperature)/235C,1250MPa(atambienttemperature)/235C and1550MPa(atambienttemperature)/235CDimensions 1Scope ThisInternationalStandardspecifiesthedimensionsofselflo
17、cking,floating,selfaligningbarrelnuts, with MJthreads, for classifications: 900MPa 1) /235C 2) , 1100MPa 1) /235C 2) , 1250MPa 1) /235C 2) and 1550MPa 1) /235C 2) . ThisInternationalStandardisonlyapplicableforthecompilationofaerospaceproductstandards. 2Normative reference Thefollowingnormativedocume
18、ntcontainsprovisionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentamendmentsto,orrevisionsof,anyofthese publicationsdonotapply.However,partiestoagreementsbasedonthisInternationalStandardareencouragedto investigatethepossibilityofapplyi
19、ngthemostrecenteditionofthenormativedocumentindicatedbelow.For undatedreferences,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIEC maintainregistersofcurrentlyvalidInternationalStandards. ISO58552:1999, AerospaceMJthreadsPart2:Limitdimensionsforboltsandnuts . 3 Configuration
20、anddimensions SeeFigure1andTable1.Dimensionsandtolerancesareexpressedinmillimetres.Theyapplyafteranysurface coating(s)butbeforetheapplicationofanylubricant. 1) Correspondstotheminimumtensilestresswhichthenutisabletowithstandatambienttemperaturewithoutbreakingor crackingwhentestedwithaboltofahigherst
21、rengthclass. 2) Maximumtemperaturethatthenutisabletowithstand,withoutpermanentalterationtoitsoriginalcharacteristics,after ambienttemperaturehasbeenrestored.Themaximumtemperatureisconditionedbythesurfacetreatment. BS A 359:2000)E(9991:87221OSI OSI 2 Key 1 Threadelement 2 Cradle NOTE Detailsofformnot
22、statedareatthemanufacturersoption. a Thesevalues,inmicrometres,applybeforeanysurfacecoating(s)is(are)applied.Thevaluesdonotapplytothreads, punchedholesorshearedgesthesurfacetextureofwhichwillbeasachievedbytheusualmanufacturingmethods. b Thread c Formoutofroundinthisareatoachievetheselflockingtorquer
23、equirement.Toolingmarkspermissibleinthisarea. d Meansofretainingnutincradlearemanufacturersoptionprovidingenvelopeandperformancerequirementsaremet. e Radialfloat:0,4min. Figure1 BS A 359:2000OSI )E(9991:87221OSI 3 Table1 Diameter code Thread a FGHKNPT Installation holesize - 01 0 , 0,25 max. max. -
24、025 0 , 0 025 + , max. 060 MJ6 14H5H 12,9 14 10,6 9,5 3,35 6,8 8,2 13 070 MJ7 14H5H 13,9 15 11,5 9,8 3,7 7,8 9,5 14 080 MJ8 14H5H 14,9 17 12 10,2 8,8 9,9 15 100 MJ10 1,254H5H 17,9 20 15 12,5 4,6 10,8 12 18 120 MJ12 1,254H5H 21,9 24 18,1 15,7 5,7 12,8 14,2 22 140 MJ14 1,54H5H 25,9 28 22,2 17,2 6,5 14
25、,8 16,5 26 160 MJ16 1,54H5H 29,9 32 25,7 19,5 7,55 16,8 18,6 30 180 MJ18 1,54H5H 32,9 36 26,2 22 8,45 18,8 20,8 33 200 MJ20 1,54H5H 36,9 40 29,3 25,5 9,6 20,8 23 37 220 MJ22 1,54H5H 40,9 44 32,1 26 10,35 22,8 25,2 41 240 MJ24 24H5H 43,9 48 35 28,6 11,25 24,8 27,5 44 270 MJ27 24H5H 49,9 54 39,3 31,5
26、12,55 27,8 30,7 50 300 MJ30 24H5H 55,9 60 43,7 34,8 13,95 30,8 34 56 330 MJ33 24H5H 61,9 66 48,1 38 15,35 33,8 37,3 62 360 MJ36 24H5H 67,9 72 52,4 41,5 16,65 36,8 40,6 68 390 MJ39 24H5H 73,9 78 56,8 45 18,05 39,8 44 74 a InaccordancewithISO58552.Intheselflockingzone,thetolerancesapplybeforeformingou
27、tofround. BS A 359:2000BS A 359:2000 ISO 12278:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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