1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 8788:2000 ICS 49.0
2、30.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Aerospace Nuts, metric Tolerances of form and positionThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and com
3、es into effect on 15 July 2000 BSI 07-2000 ISBN 0 580 36161 6 BS ISO 8788:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 8788:2000 and implements it as the UK national standard. The UK participation in its preparation w
4、as 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 enquirers to understand the text; present to the responsible international/European committ
5、ee 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 represented on this subcommittee can be obtained on request to its secretary. Cross-refe
6、rences 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 Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Cata
7、logue. 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 of itself confer immunity from legal obligations. Summary of pages This document com
8、prises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 22, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.Referencenumber Numroderfrence ISO8788:2000(E/F) INTERNATIONAL STANDA
9、RD NORME INTERNATIONALE ISO 8788 Secondedition Deuximedition 2000-06-15 AerospaceNuts,metricTolerances offormandposition Aronautiqueetespacecrous mtriquesTolrancesdeformeet depositionISO8788:2000(E/F) ii ISO8788:2000(E/F)iii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefed
10、erationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmen
11、talandnon-governmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandar
12、dsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectof patentrights.ISOshallnotbeheldres
13、ponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardISO8788waspreparedbyTechnicalCommitteeISO/TC20, Aircraft and space vehicles, SubcommitteeSC4, Aerospace fastener systems. Thissecondeditioncancelsandreplacesthefirstedition(ISO8788:1987),whichhasbeentechnicallyrevised. AnnexesAtoIo
14、fthisInternationalStandardareforinformationonly.ISO8788:2000(E/F) iv Avant-propos LISO(Organisationinternationaledenormalisation)estunefdrationmondialedorganismesnationauxde normalisation(comitsmembresdelISO).LlaborationdesNormesinternationalesestengnralconfieaux comitstechniquesdelISO.Chaquecomitme
15、mbreintressparunetudealedroitdefairepartieducomit techniquecrceteffet.Lesorganisationsinternationales,gouvernementalesetnongouvernementales,en liaisonaveclISO,participentgalementauxtravaux.LISOcollaboretroitementaveclaCommission lectrotechniqueinternationale(CEI)encequiconcernelanormalisationlectrot
16、echnique. LesNormesinternationalessontrdigesconformmentauxrglesdonnesdanslesDirectivesISO/CEI,Partie3. LesprojetsdeNormesinternationalesadoptsparlescomitstechniquessontsoumisauxcomitsmembrespour vote.LeurpublicationcommeNormesinternationalesrequiertlapprobationde75%aumoinsdescomits membresvotants. L
17、attentionestappelesurlefaitquecertainsdeslmentsdelaprsenteNormeinternationalepeuventfaire lobjetdedroitsdepropritintellectuelleoudedroitsanalogues.LISOnesauraittretenuepourresponsablede nepasavoiridentifidetelsdroitsdepropritetavertideleurexistence. LaNormeinternationaleISO8788atlaboreparlecomittech
18、niqueISO/TC20, Aronautique et espace, sous-comitSC4, lments de fixation pour constructions arospatiales. Cettedeuximeditionannuleetremplacelapremiredition(ISO8788:1987),dontelleconstitueunervision technique. LesannexesAIdelaprsenteNormeinternationalesontdonnesuniquementtitredinformation.INTERNATIONA
19、LSTANDARD NORMEINTERNATIONALE ISO8788:2000(E/F)1 AerospaceNuts,metric Tolerancesofformand position Aronautiqueetespace crousmtriques Tolrancesdeformeet deposition 1 Scope 1 Domainedapplication ThisInternationalStandarddefinesthetolerancesof formandpositionofmetricnutsmeantforaerospace construction.T
20、hesetolerancescomplywithISO1101, ISO2692andISO5459. La prsente Norme internationale spcifie les tolrancesdeformeetdepositionapplicablesaux crous mtriques destins aux constructions arospatiales.Cestolrancessontexprimesconfor- mmentlISO1101,lISO2692etlISO5459. 2 Normativereferences 2 Rfrencesnormative
21、s Thefollowingnormativedocumentscontainprovisions which,throughreferenceinthistext,constitute provisionsofthisInternationalStandard.Fordated references,subsequentamendmentsto,orrevisions of,anyofthesepublicationsdonotapply.However, partiestoagreementsbasedonthisInternational Standardareencouragedtoi
22、nvestigatethepossibility ofapplyingthemostrecenteditionsofthenormative documentsindicatedbelow.Forundatedreferences, thelatesteditionofthenormativedocumentreferred toapplies.MembersofISOandIECmaintain registersofcurrentlyvalidInternationalStandards. ISO1101: 1) , Geometrical Product Specifications (
23、GPS) Geometrical tolerancing Tolerancing of form, orientation, location and run-out. ISO2692:1988, Technical drawings Geometrical tolerancing Maximum material principle. ISO5459:1981, Technical drawings Geometrical tolerancing Datums and datum-systems for geometrical tolerancing. Lesdocumentsnormati
24、fssuivantscontiennentdes dispositionsqui,parsuitedelarfrencequiyest faite,constituentdesdispositionsvalablespourla prsenteNormeinternationale.Pourlesrfrences dates,lesamendementsultrieursoulesrvisions decespublicationsnesappliquentpas.Toutefois,les partiesprenantesauxaccordsfondssurlaprsente Normein
25、ternationalesontinvitesrechercherla possibilitdappliquerlesditionslesplusrcentes desdocumentsnormatifsindiqusci-aprs.Pourles rfrencesnondates,ladernireditiondu documentnormatifenrfrencesapplique.Les membresdelISOetdelaCEIpossdentleregistre desNormesinternationalesenvigueur. ISO1101: 1) , Spcificatio
26、n gomtrique des produits (GPS) Tolrancement gomtrique Tolrance- ment de forme, orientation, position et battement. ISO2692:1988, Dessins techniques Tolran- cement gomtrique Principe du maximum de matire. ISO5459:1981, Dessins techniques Tolran- cement gomtrique Rfrences spcifies et systmes de rfrenc
27、es spcifies pour tolrances gomtriques. 1)Tobepublished.(RevisionofISO1101:1983) 1)publier.(RvisiondelISO1101:1983)ISO8788:2000(E/F) 2 3 Typesofnuts,illustrationof tolerancesofformandposition,values 3 Typesdcrou,symbolisation destolrancesdeformeetdeposition, valeurs SeeTable1forthetolerancesofformand
28、positionto beappliedinrelationtothetypeofnut,Tables2to11 fortheillustrationoftolerancesofformandposition fordifferenttypesofnut.SeeTables12and13forthe valuesofthetolerances.Inthe“illustration”column, onlyonetypeofnuthasbeenshownasanexample, butthecorrespondingtoleranceappliestoalltypesof nutspecifie
29、dinthethirdcolumn. VoirleTableau1pourlestolrancesdeformeetde positionapplicablesenfonctiondutypedcrou,les Tableaux211pourlasymbolisationdestolrances deformeetdepositiondesdiffrentstypesdcrouet lesTableaux12et13pourlesvaleurs.Dansla colonnesymbolisation,unseultypedcrouat dessintitredexemple,maislatol
30、rancecor- respondanteestapplicablelensembledestypes dcrouindiqusdanslatroisimecolonne.ISO8788:2000(E/F)3 Table 1 Tolerances of form and position to be applied in relation to the type of nut Tableau 1 Tolrances de forme et de position applicables en fonction du type dcrou Sequence number Numro de squ
31、ence Self-locking nuts crous freinage interne Table Tableau Tolerance of former position Tolrance de forme ou de position Plain nuts crous ordinaires Slotted nuts crous crneaux with wrenching feature serrage par cl clinch / shank sertir anchor river formed out-of-round freinage par dformation two-lu
32、g double patte single-lug simple patte corner dangle with plastic locking ring freinage par bague plastique hexagonal hexagonaux bihexagonal bihexagonaux 2 Flatness of bearing surface Planit de la face dappui 11111 3 Squareness of bearing surface Perpendicularit de la face dappui 222222333 4 Across
33、flats symmetry Symtrie des surplats 44456 5 Symmetry of slots Symtrie des crneaux 7 6 Locking wire hole position Position des trous pour fil-frein 8 7 Flange run-out Battement de lembase 999 8 Counterbore coaxiality Coaxialit du chambrage 10 10 10 10 10 10 9 Symmetry of flange of the clinch / shank
34、nuts Symtrie de lembase des crous sertir 11 10 Clinching shank coaxiality Coaxialit de la jupe de sertissage 12 11 Rivet hole position Position des trous de rivets 13 14 15 Annex (informative) Annexe (informative) AX B X C X D X E X F X G X H X I XISO8788:2000(E/F) 4 Table2Flatnessofbearingsurface T
35、ableau2Planitdelafacedappui Tolerancesinmillimetres Tolrancesenmillimtres Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 1 Plain a ,slottedandself- lockingnutswith wrenchingfeature crousordinaires a , crneauxetfreinage interne,serragepar cl a Theflatnesstoleranceapplies
36、tobothfacesofplainnuts. Latolrancedeplanitsappliqueauxdeuxfacesdescrousordinaires. Table3Squarenessofbearingsurface Tableau3Perpendicularitdelafacedappui Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 2 Plain,slottedandself- lockingnutswith wrenchingfeature,and clinch/s
37、hanknuts crousordinaires, crneauxetfreinage interne,serragepar cl,etcroussertir 3 Anchornuts crousriver a SeeTable13.Thesquarenesstoleranceappliestobothfacesofplainnuts. VoirTableau13.Latolrancedeperpendicularitsappliqueauxdeuxfacesdescrousordinaires. b ApplicableoveradiameterequaltoK,seeTable13.For
38、floatinganchornutsandgangchannels,thisrequirementapplies tothefloatingelementonlyoveradiameterequaltothewidthofthiselement. ApplicablesurundiamtregalK,voirTableau13.Pourlescrousflottantsetlesbandes,cetteexigencenesapplique qullmenttaraudsurundiamtregallalargeurdecetlment.ISO8788:2000(E/F)5 Table4Acr
39、ossflatssymmetry Tableau4Symtriedessurplats Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 4 Hexagonalnuts: plain slotted withplasticlocking ring croushexagonaux: ordinaires crneaux freinageinterne parbagueplastique 5 Self-lockinghexagonal nutsformedout-of- round croush
40、exagonaux freinageinternepar dformationISO8788:2000(E/F) 6 Table4(continued) Tableau4(suite) Tolerancesinmillimetres Tolrancesenmillimtres Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 6 Bihexagonalnuts crousbihexagonaux a SeeTable12. VoirTableau12. b SeeTable13.Values
41、applybeforeformingout-of-round. VoirTableau13.Lavaleursappliqueavantdformation. c Valueappliesbeforeformingout-of-round. Cettevaleursappliqueavantdformation.ISO8788:2000(E/F)7 Table5Symmetryofslots Tableau5Symtriedescrneaux Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou
42、 7 Slottednuts crouscrneaux a SeeTable12. VoirTableau12. Table6Lockingwireholeposition Tableau6Positiondestrouspourfil-frein Tolerancesinmillimetres Tolrancesenmillimtres Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 8 Plainhexagonalnuts croushexagonaux ordinairesISO87
43、88:2000(E/F) 8 Table7Flangerun-out Tableau7Battementdelembase Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 9 Hexagonaland bihexagonalnuts croushexagonauxet bihexagonaux a SeeTable12. VoirTableau12. Table8Counterborecoaxiality Tableau8Coaxialitduchambrage Sequencenumbe
44、r Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 10 Anchornutsandnuts withwrenchingfeature crousserragepar cletcrousriverISO8788:2000(E/F)9 Table9Symmetryofflangeoftheclinch/shanknuts Tableau9Symtriedelembasedescroussertir Tolerancesinmillimetres Tolrancesenmillimtres Sequencenumber N
45、umrodesquence Illustration Symbolisation Typeofnut Typedcrou 11 Clinch/Shanknuts, self-locking croussertir, freinageinterne a DatumAisthethreadpitchdiameter. LarfrenceAestlediamtresurflancsdufiletage. Table10Clinchingshankcoaxiality Tableau10Coaxialitdelajupedesertissage Tolerancesinmillimetres Tolr
46、ancesenmillimtres Sequencenumber Numrodesquence Illustration Symbolisation Typeofnut Typedcrou 12 Clinch/Shanknuts, self-locking croussertir, freinageinterneISO8788:2000(E/F) 10 Table11Rivetholeposition Tableau11Positiondestrousderivets Tolerancesinmillimetres Tolrancesenmillimtres Sequencenumber Nu
47、mrodesquence Illustration Symbolisation Typeofnut Typedcrou 13 Two-luganchornuts crousriver doublepatte 14 Single-luganchornuts withtwoholes crousriver simplepatte deuxtrousISO8788:2000(E/F)11 Table11(continued) Tableau11(suite) Tolerancesinmillimetres Tolrancesenmillimtres Sequencenumber Numrodesqu
48、ence Illustration Symbolisation Typeofnut Typedcrou 15 Corneranchornuts crousriverdangle a Forfixedanchornuts,datumAisthethreadpitchdiameter;forfloatinganchornuts,datumAistheholediameterinthe cage. Pourlescrousriverfixes,larfrenceAestlediamtresurflancsdufiletage;pourlescrousriverflottants,la rfrenceAestlediamtredutroudanslacage.ISO8788:2000(E/F) 12 Table12Valuesdependentonnominalthreaddiameter Tableau12Valeursdpendantdudia
