1、Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ANAMERICANNATIONALSTANDARDUNIFIEDMINIATURESCREWTHREADSASMEB1.10M-2004(RevisionofASMEB1.10M
2、-1997)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:March 5,2004This Standard will be revised when the Society approves
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9、tten permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016Copyright 2004 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on
10、Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.viCorrespondence With the B1 Committee.vii1General.12Screw Thread Profile.2Figures1Basic Profile for the UNM Screw Threads.42Design(Maximum Mater
11、ial)Thread Forms.53Disposition of Tolerances and Crest Clearances.8Tables1Thread Size Dimensions,Basic and Design.22Limits of Size and Tolerances.33Thread Form Formulas.64Thread Form Dimensions,Basic and Design.65Thread Size Formulas,Basic and Design.76Tolerance Formulas for Limits of Size.7Nonmanda
12、tory AppendicesAGages and Gaging for Unified Miniature Screw Threads.9BInch Conversion of Table 1.10CInch Conversion of Table 2.11DInch Conversion of Table 4.13iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No fur
13、ther reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDThe standardization of threads for miniature fastening screws and similar purposes has beenunder study since 1927,when the National Screw Thread commission prepared a compilationof the practices of American manufacturer
14、s and various foreign standards.The latter includedthe Swiss standard NHS 56100,which first appeared in 1923.However,for want of sufficientinterest,no further action was taken in the United States until 1943,when the demands of modernwarfare awakened both theneed for domestic standardization and the
15、desirability of internationalstandardization,particularly among the inch-using countries.For the consideration of this dualproblem,together with other thread matters confined principally to the instrument industry,theAmerican Standards Association established,in 1944,ASA War Committee B1.7 on Instru
16、mentScrew Threads.The first significant progress toward standardization and unification of miniature threadswas achieved at the American-British-Canadian Conference on the Unification of EngineeringStandards held in Ottawa in 1945,when the delegations of these three countries joined in recom-mending the adoption of the NHS thread series in the size range of 0.30 mm to 0.90 mm havinga 50 deg thread angle,and the development of a series closely following the NHS series for sizeslarger than 0.90 mm
