1、AN AMERICAN NATIONAL STANDARDMetric Screw Threads:M ProfileASME B1.13M-2005(Revision of ASME B1.13M-2001)Intentionally left blank ASME B1.13M-2005(Revision of ASME B1.13M-2001)Metric ScrewThreads:M ProfileAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016Date of Issuance: March 10, 20
2、06The next edition of this Standard is scheduled for publication in 2010. There will be no addenda orwritten interpretations of the requirements of this Standard issued to this edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was develope
3、d under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was mad
4、eavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to
5、 the validity of any patent rights asserted in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are express
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7、nt of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an e
8、lectronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2006 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword viComm
9、itteeRoster viii1 General . 11.1 Scope 11.2 Interchangeability 11.3 References. 11.4 Acceptability. 11.5 ReferenceTemperature. 11.6 GeneralSymbols. 11.7 Units 11.8 FederalGovernmentUse. 12 Terminology . 22.1 Definitions. 23 Screw Thread Profile . 43.1 BasicMThreadProfile. 43.2 DesignMProfiles 63.3 C
10、restandRootForms 64 Series of Threads 64.1 StandardCoarsePitchGeneralPurposeandMechanicalFastenerSeries,MProfile. 64.2 StandardFinePitchMProfileScrewThreads. 74.3 PreferredSizes. 74.4 ISOMetricThreadSeries. 75 Allowances and Tolerances . 75.1 ISOSystemofLimitsandFitsasAppliedtoScrewThreads. 75.2 Tol
11、eranceGrade. 115.3 TolerancePosition . 125.4 Allowance/ToleranceFormulasandTables. 125.5 SelectedToleranceClasses 125.6 LengthofThreadEngagement 125.7 CircularRunout 125.8 LeadandFlankAngleTolerances 125.9 CoatedorPlatedThreads 126 Design Formulas and Tabulated Values for Allowances and Tolerances 1
12、26.1 General 126.2 RoundingProcedureforTabulatedValues 126.3 Allowances(FundamentalDeviations) 156.4 LengthofThreadEngagement 156.5 CrestDiameterTolerances 156.6 PitchDiameterTolerances 157 Designation of Screw Threads 197.1 General 197.2 DesignationofStandardScrewThreads. 19iii7.3 DesignationofThre
13、adFit 207.4 DesignationofRoundedRootExternalThread 207.5 DesignationofThreadsHavingModifiedCrests 207.6 DesignationofSpecialThreads. 207.7 DesignationofMultipleStartThreads 207.8 DesignationofCoatedorPlatedThreads . 207.9 DesignationofThreadsWithAdjustedSizeLimits 208 Dimensional Accommodation of Co
14、ating or Plating for 60 deg Threads 218.1 Introduction. 218.2 MaterialLimitsforCoatedThreads. 218.3 DimensionalEffectsofCoating. 218.4 ExternalThreadWithAllowanceAvailableforCoating . 218.5 ExternalThreadWithNoAllowanceforCoating 238.6 InternalThreads. 248.7 ElectrodepositedCoatings 248.8 OtherConsi
15、derations. 259 Limits of Size 259.1 StandardThreadSeries. 259.2 DeterminationofSizeLimits. 259.3 FormulasforCalculatingLimitingDimensionsforMProfileScrewThreads. 259.4 ExamplesofCalculationsofSizeLimits. 3410 Lead and Flank Angle Tolerances . 3710.1 LeadandFlankAngleAcceptance 37Figures1 BasicMThrea
16、dProfile(ISO68-1BasicProfile) 42 InternalThread,DesignMProfileWithNoAllowance(FundamentalDeviation)(MaximumMaterialCondition). 53 ExternalThread,DesignMProfileWithNoAllowance(FundamentalDeviation)(FlanksatMaximumMaterialCondition) 54 MetricToleranceSystemforScrewThreads. 65 MProfile,ExternalThreadRo
17、ot,UpperandLowerLimitingProfilesforrmin.p0.125PandforFlatRootForm(ShownforTolerancePositiong). 76 RatioofPitchDiameterChangetoThicknessofCoatingon60degThreads. 227 EffectsofElectrodepositedCoatingon60degExternalThreads. 238 InternalThreadLimitingMProfile,TolerancePosition H 349 ExternalThreadLimitin
18、gMThreadProfile 37Tables1 GeneralSymbols. 22 ThreadData,MProfile. 33 LimitValuesforMProfileMinimumRoundedRootRadius. 84 StandardCoarsePitchMProfileGeneralPurposeandMechanicalFastenerSeries 85 StandardFinePitchMProfileScrewThreads. 86 ISO261Diameter/PitchCombinationsFromWhichtheStandardsWereSelected
19、. 97 LengthofThreadEngagement(ISO965-1) 138 ExamplesofToleranceClassesRequiredforNormalGageLengthContactsWithVariousThreadEngagementLengths . 149 MinorDiameterTolerancesofInternalThread,TD1(ISO965-1). 1410 MajorDiameterTolerancesofExternalThread,Td(ISO965-1). 15iv11 PitchDiameterToleranceofExternalT
20、hread,Td2(ISO965-1) . 1612 PitchDiameterToleranceofInternalThread,TD2(ISO965-1) . 1713 Allowance(FundamentalDeviation)forInternalandExternalThreads(ISO965-1) 1814 ExternalThreadLimitingDimensionsMProfile 2615 InternalThreadLimitingDimensionsMProfile 3516A ExampleofExternalScrewThread,StandardSize. 3
21、916B ExampleofInternalMetricScrewThread,StandardSize 4116C ExampleofExternalMetricScrewThread,Non-StandardSize. 4316D ExampleofInternalMetricScrewThread,Non-StandardSize. 4517 AllowableVariationsinLeadandEquivalentChangeinFunctionalDiameter 4718 AllowableVariationsin30degBasicHalf-AngleofScrewThread
22、s 50Nonmandatory AppendicesA StandardRulesforRounding 51B ThreadStrengthDesignFormulas 52C LimitingDimensionsMProfileScrewThreadsInchTranslation 53D BasicDimensionsforISOSeriesMetricScrewThreadsFromISO724 64E OvertappedNutThreadClass6AX. 68F InternalThreadAllowance(FundamentalDeviation)TolerancePosi
23、tionE. 70vFOREWORDIn1966,ANSIStandardsCommitteeB1StandardizationandUnificationofScrewThreadsstarted preparation of a document for ISO Metric Screw Threads based on the current ISOrecommendationsanddraftdocuments.SincethereweresomeuncertaintiesastotheacceptanceofthisthreadbyAmericanindustries,theinfo
24、rmationwaspublishedinAugust1967withthetitle,“InterpretativeDocumentMetricScrewThreadsB1.13.”ThisdocumentwasneverapprovedasanANSIstandard.ArevisionoftheinformationbasedonthethencurrentISOstandardsandrecommendationswaspublishedinApril1972withthetitle“B1ReportISOMetricScrewThreads.”Again,thedocument wa
25、s never approved as an ANSI standard. The document number was thereforeremovedandthestatuschangedtoareport.Interest in metric screw threads has grown at a rapid pace over the past several years withthe advent of greater import andexport business. The American National Standards Institute,in April 19
26、71, established a committee, ANSI Special Committee to Study Development of anOptimum Metric Fastener System (OMFS). Included in the scope was metric screw threads.RecommendationsweresubmittedtoajointISO/TC1/TC2workinggroupestablishedinSeptem-ber1973tostudytheOMFSproposals.AnISO/TC1/TC2AdHocAdvisory
27、PanelmeetinginApril1975inMunichreachedacompro-mise between the OMFS recommendations and the existing ISO screw thread system. Thiscompromise was approved, in the main, by the ISO/TC1 in its eleventh plenary meeting inStockholm,June1976.(a) ThefirstissueofthisStandard,designatedANSIB1.13M,wasapproved
28、asanAmericanNationalStandardonFebruary12,1979.Itprovidedasystemofmetricscrewthreadsforgeneralfastening purposes in mechanisms and structures and was in basic agreement with ISO screwthreadstandardsandresolutionscurrentatthattime.Itfeatureddetailedinformationfordiameter-pitchcombinationsselectedaspre
29、ferredstandardsizes.(b) The1983issueofthisStandardwasdesignatedANSI/ASMEB1.13M-1983andwasapproved as an American National Standard on August 5, 1983. It updated the 1979 issue toinclude(1) theadditionofthenewISOtolerancepositionf(2) theadditionofasectionondimensionalaccommodationofcoatingorplating(3
30、) theadditionofasectiononleadandflankangletolerances(c) The1995issueofthisStandardwasdesignatedASMEB1.13M-1995andwasapprovedasanAmericanNationalStandardonFebruary20,1995.Itupdatedthe1983issuetoinclude(1) theadditionofan8mmpitchseries(2) theadditionofstandardsizeM10 H11547 1(3) theprovisionforadjustm
31、entofinternalthreadtoleranceclassforshortandlonglengthsofthreadengagement,whichmaybeusedinsteadofexternalthreadclassadjustment(4) changesinroundingproceduresthatfollowtheprinciplesofASMEB1.30M(d) The2001issueofthisStandardwasdesignatedASMEB1.13M-2001andwasapprovedasanAmericanNationalStandardonMay22,
32、2001.Itupdatedthe1995issuetoinclude(1) incorporationofchangesmadeinthe1998issueofISO261,includingadditionofdiame-ters125,130,and140inthe8mmpitchseries;andchangingofthe7mmdiameterfrom3rdto2ndchoiceinTable6.(2) recognitionofchangesmadeinthe1998issueofISO965-1,includingthestatingofwhenInternationalprac
33、tice permitsthreaddesignation withoutthread class(notUSA practice);andmodifyingthedesignationofmultipleleadthreadstobemoreinlinewithISOpractice.(3) incorporationofthenew1998InternationalStandard,ISO965-5,byaddingNonmanda-toryAppendixEforClassAXthreads.(4) minorchangesinsomethreadrootdiametersduetomo
34、difiedcalculationandroundingproceduresaddedinASMEB1.30.ASMEB1.30usesroundingupwardwhenthedigitfollowingvithelastroundedplaceisa5followedbyzeros.PriortoissueofASMEB1.30,roundingwastothenearestevendigit.TabulatedvaluesappearinginISOStandardsarenotsubjecttoroundingrulesofASMEB1.30.(5) changesinCircular
35、Runouttolerances.(6) otherrequiredupdatesandcorrections.(e) Thisissueupdatesthe2001editionandincludes(1) additionofanewNonmandatoryAppendixFtoprovideanewtolerancepositionE(2) additionoftoleranceclass6hasapreferredclass(3) additionofM8x1.256AXtoNonmandatoryAppendixE(4) revisionofsection8on“Dimensiona
36、lAccommodationofCoatingorPlating.”toincludeallowancesatthreadrootsandtoexpandtheinformationoninternalthreads(5) revisionofsection7toprovidethreaddesignationsinaccordancewithASMEY14.6-2001(6) revision of some tabulated inch translation values in Nonmandatory Appendix C andtheexamplesofcalculationofth
37、readsizevaluesinpara.9.4,inaccordancewithASMEB1.30-2002(7) additionofpara.7.9fordesignationofathreadwithadjustedsizelimits(8) otherrequirededitorialupdatesandcorrectionsSuggestionsforimprovementofthisStandardarewelcome.TheyshouldbesenttoSecretary,ASMEB1StandardsCommittee,ThreeParkAvenue,NewYork,NY10
38、016-5990.ThisrevisionwasapprovedasanAmericanNationalStandardonSeptember29,2005.viiASME B1 COMMITTEEStandardization and Unification of Screw Threads(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSA. L. Barrows, ChairD. S. George, Vic
39、e ChairA. L. Guzman, SecretarySTANDARDS COMMITTEE PERSONNELG. L. Allen, The L. S. Starrett Co.A. L. Barrows, Kennametal-IPGF. G. Calderone, Corresponding Member, Quality SystemsImplementersL. N. Dixon, Jr., General ElectricR. Dodge, Pennoyer-Dodge Co.G. A. Flannery, Corresponding Member, Mercury Gag
40、e Co.H. N. Frost, Defense Supply Center PhiladelphiaJ. O. Gehret III, Vermont Thread GageD. S. George, Ford Motor Co.J. R. Gervasi, Kerr Lakeside, Inc.J. Greenslade, Greenslade and Co.A. L. Guzman, The American Society of Mechanical EngineersR. J. Hukari, SPS TechnologiesL. C. Johnson, The Johnson G
41、age Co.D. D. Katz, Precision FittingsR. P. Knittel, Leitech-US Ltd.SUBCOMMITTEE 13 METRIC SCREW THREADSE. Schwartz, ChairD. Miskinis, Vice Chair, Kennametal-GreenfieldA. L. Barrows, Kennametal-IPGF. G. Calderone, Corresponding Member, Quality SystemsImplementersR. Dodge, Pennoyer-Dodge Co.D. S. Geor
42、ge, Ford Motor Co.J. Greenslade, Greenslade and Co.viiiB. Larzelere, Corresponding Member, Deltronic Corp.L. L. Lord, Corresponding Member, Caterpillar, Inc.M. H. McWilliams, PMC LonestarD. Skierski, Alternate, Sterling Gage and CalibrationD. Miskinis, Kennametal-GreenfieldW. R. Newman, Correspondin
43、g Member, ConsultantD. R. Oas, Seaway Bolt and Specials Corp.M. W. Rose, Glastonbury Southern GageW. A. Watts, Alternate, Glastonbury Southern GageE. Schwartz, ConsultantR. H. Searr, Member Emeritus, Mak Tool and GageB. F. Sheffler, Dresser-Rand Co.A. D. Shepherd, Jr., Emuge Corp.R. D. Strong, Gener
44、al Motors Vehicle Engineering CenterA. F. Thibodeau, Member Emeritus, Swanson Tool Manufacturing,Inc.R. E. Vincent, Jr., General Plug Manufacturing Co.C. J. Wilson, Industrial Fasteners InstituteL. L. Lord, Corresponding Member, Caterpillar, Inc.W. R. Newman, Corresponding Member, ConsultantR. D. St
45、rong, General Motors Vehicle Engineering CenterA. F. Thibodeau, Corresponding Member, Swanson ToolManufacturing, Inc.R. E. Vincent, Jr., General Plug Manufacturing Co.C. J. Wilson, Industrial Fasteners InstituteASME B1.13M-2005METRIC SCREW THREADS: M PROFILE1 GENERAL1.1 ScopeThisStandard containsgen
46、eralmetric standardsfora60degsymmetricalscrewthreadwithabasicISO68-1profile designated M profile. TheM profile threads oftoleranceclass6H/6gareintendedformetricapplica-tions where inch class 2A/2B have been used. At theminimummateriallimits,the6H/6gresultsinalooserfitthanthe2A/2B.Tabulardataisalsopr
47、ovidedforatightertolerancefitexternalthreadofclass4g6g,whichisapproximatelyequivalenttotheinchclass3Abutwithanallowanceapplied.Formulationandtolerancingdataisincludedforapplicationsrequiringotherfits.NOTE: A4H5H/4h6hisapproximatelyequivalenttoaclass3A/3Bfitintheinchsystem.1.2 InterchangeabilityThrea
48、ds produced to this Standard are fully inter-changeablewiththreadsconformingtootherNationalStandardsthatarebasedonISO68-1basicprofileandISO965-1tolerancepractices.1.2.1 Assembly. Threadsproducedinaccordancewith M profile and MJ profile (ASME B1.21M) designdatawillassemblewitheachother.However,extern
49、alMJthreadswillencounterinterferenceontherootradiiwithinternalMthreadcrestswhenboththreadsareatmaximummaterialcondition.1.3 ReferencesThelatestissuesofthefollowingdocumentsformapartofthisStandardtotheextentspecifiedherein.ASME B1.3, Screw Thread Gaging Systems forDimensionalAcceptabilityInchandMetricScrewThreads(UN,UNR,UNJ,M,andMJ)ASMEB1.7M,Nomenclature,Definitions,andLetterSymbolsforScrewThreadsASMEB1.16M,GagesandGagingforMetricMScrewThreadsASMEB1.21M,MetricScrewThreads:MJProfileASME B1.30, Screw Threads Standard Practice forCalculatingandRoundingDimensionsASMEB47.1,GageBlan
