1、AN AMERICAN NATIONAL STANDARDASME B18.31.4M-2009Threaded Rod (Metric Series)Intentionally left blank ASME B18.31.4M-2009Threaded Rod(Metric Series)AN AMERICAN NATIONAL STANDARDDate of Issuance: January 11, 2010This Standard will be revised when the Society approves the issuance of a new edition. The
2、re willbe no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B18 Committee may be published as Cases.Cases and interpretations are published on the ASME Web site under th
3、e Committee Pages athttp:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved
4、 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 madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,r
5、egulatory 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 the validity of any patent rights asserted in connection with anyitems mentioned in this document, and doe
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8、ued 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 electronic retrieval system or otherwise,without the prior written permission of the publisher.The American
9、Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2010 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the B18 Committee vi1 Introduction 12 Comparison to ISO Documents. 13 R
10、eferenced Standards . 14 Terminology 15 Dimensions. 16 Length . 17 Ends . 18 Screw Threads 29 Straightness 210 Material and Mechanical Requirements. 211 Finish 312 Workmanship. 313 Alloy and Property Class Symbol and Manufacturers Marking . 314 Inspection and Quality Assurance 315 Coating Thickness
11、Conformance 316 Material and Mechanical Conformance 317 Reporting of Inspection Results 318 Designation. 3Table1 Dimensions for Metric Threaded Rod 2iiiFOREWORDIn September 2008, ASME B18 Subcommittee 31 received a request to develop a standard forinch dimensioned threaded rod. This resulted in the
12、development and balloting of a draft forASME B18.31.3, Threaded Rod (Inch Series). Subsequently it was decided that a companiondocumentformetricthreadedrodshouldbedeveloped.Althoughthreadedrodiswidelyavailablein the marketplace, there were no current ISO or American National Standards for threadedro
13、d. DOD-S-63543 and DOD-S-63543/2 specifications, covering metric threaded rod in severalmaterials, were cancelled in 1995.This Standard specifically identifies many of the most common materials and coatings availablein threaded rod but is also applicable to other materials and coatings as specified
14、by a purchaser.Standard lengths are identified but this Standard permits other lengths to be ordered.The first draft was balloted in March 2009 with a single disapproval. Subcommittee 31 adjudi-catedthecommentsandagreedtomakeseveralchanges.Thechangeswereballotedandapprovedby B18 Subcommittee 31 and
15、by the B18 Standards Committee with the closure of a ballot inAugust 2009. This Standard was approved by the American National Standards Institute onDecember 2, 2009.ivASME B18 COMMITTEEStandardization of Bolts, Nuts, Rivets, Screws,Washers, and Similar Fasteners(The following is the roster of the C
16、ommittee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSJ. Greenslade, ChairD. S. George, Vice ChairR. D. Strong, Vice ChairC. J. Gomez, SecretarySTANDARDS COMMITTEE PERSONNELV. Cartina, Autocraft IndustrialD. A. Clever, ConsultantA. P. Cockman, Ford Motor Co.C. A. Dugal de la
17、 Garza, TSP, Inc.D. S. George, ND IndustriesC. J. Gomez, The American Society of Mechanical EngineersJ. Greenslade, Industrial Fasteners InstituteJ. J. Grey, Contributing Member, Fastener Consulting Services, Inc.B. Hasiuk, Contributing Member, Defense Supply CenterPhiladelphiaA. Herskovitz, Consult
18、antJ. Hubbard, Contributing Member, Rockford Fastener, Inc.J. Jennings, Contributing Member, Naval Surface Warfare CenterW. H. King, Porteous Fastener Co.J. F. Koehl, Contributing Member, Spirol International Corp.SUBCOMMITTEE 31 THREADED STUDSW. K. Wilcox, Chair, ConsultantC. A. Dugal de la Garza,
19、Vice Chair, TSP, Inc.J. F. Braden, Fasteners UnlimitedD. A. Clever, ConsultantD. S. George, ND IndustriesJ. Greenslade, Industrial Fasteners InstituteA. Herskovitz, ConsultantJ. Jennings, Naval Surface Warfare CentervW. H. Kopke, ConsultantW. J. Lutkus, Emhart TeknologiesD. A. McCrindle, Canadian Fa
20、steners InstituteM. D. Prasad, Contributing Member, General Motors Corp.S. Savoji, ITW MedalistW. R. Schevey, Contributing Member, BGM Fastener Co., Inc.Q. M. Smith III, Oregon Department of TransportationW. R. Stevens, RamcoR. D. Strong, ConsultantS. W. Vass, ConsultantC. B. Wackrow, MNP Corp.W. K.
21、 Wilcox, ConsultantC. B. Williamson, Fastenal Co.C. J. Wilson, ConsultantR. B. Wright, Contributing Member, Wright Tool Co.J. G. Zeratsky, National Rivet and Manufacturing Co.J. F. McCarrick, Defense Supply Center PhiladelphiaR. B. Meade, Atrona Material Testing Laboratories, Inc.W. Schevey, BGM Fas
22、tener Co., Inc.G. M. Simpson, Semblex Corp.W. R. Stevens, RamcoR. D. Strong, ConsultantC. B. Wackrow, MNP Corp.C. B. Williamson, Fastenal Co.C. J. Wilson, ConsultantCORRESPONDENCE WITH THE B18 COMMITTEEGeneral. ASME Standards are developed and maintained with the intent to represent theconsensus ofc
23、oncerned interests. Assuch, users ofthis Standard mayinteract with theCommitteeby requesting interpretations, proposing revisions, and attending Committee meetings. Corre-spondence should be addressed to:Secretary, B18 Standards CommitteeThe American Society of Mechanical EngineersThree Park AvenueN
24、ew York, NY 10016-5990http:/go.asme.org/InquiryProposing Revisions. Revisions are made periodically to the Standard to incorporate changesthatappearnecessaryor desirable,asdemonstratedbytheexperience gainedfromtheapplicationof the Standard. Approved revisions will be published periodically.The Commi
25、ttee welcomes proposals for revisions to this Standard. Such proposals should beas specific as possible, citing the paragraph number(s), the proposed wording, and a detaileddescription of the reasons for the proposal, including any pertinent documentation.Proposing a Case. Cases may be issued for th
26、e purpose of providing alternative rules whenjustified, to permit early implementation of an approved revision when the need is urgent, or toprovide rules not covered by existing provisions. Cases are effective immediately upon ASMEapproval and shall be posted on the ASME Committee Web page.Requests
27、 for Cases shall provide a Statement of Needand Background Information. The requestshould identify the standard, the paragraph, figure or table number(s), and be written as aQuestion and Reply in the same format as existing Cases. Requests for Cases should also indicatethe applicable edition(s) of t
28、he standard to which the proposed Case applies.Interpretations. Upon request, the B18 Standards Committee will render an interpretation ofany requirement of the Standard. Interpretations can only be rendered in response to a writtenrequest sent to the Secretary of the B18 Standards Committee.The req
29、uest for an interpretation should be clear and unambiguous. It is further recommendedthat the inquirer submit his/her request in the following format:Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.Edition: Cite the applicable edition of the Standard for which the inter
30、pretation isbeing requested.Question: Phrase the question as a requestfor an interpretation of a specific requirementsuitable for general understanding and use, not as a request for an approvalof a proprietary design or situation. The inquirer may also include any plansor drawings that are necessary
31、 to explain the question; however, they shouldnot contain proprietary names or information.RequeststhatarenotinthisformatmayberewrittenintheappropriateformatbytheCommitteeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsider
32、ation of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, pr
33、oprietary device, or activity.Attending Committee Meetings. TheB18StandardsCommitteeregularlyholdsmeetings,whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B18 Standards Committee.viASME B18.31.4M-2009THREADED ROD (METRIC SERIES)1 INTRODUCTIONThis
34、Standardcoversthecompletegeneralanddimen-sional data for metric series threaded rod recognizedas an American National Standard. This Standard isapplicable to both fine and coarse metric series threadsof diameters from M1.6 to M56, as indicated in Table 1.The inclusion of dimensional data in this Sta
35、ndard isnot intended to imply that all of the products describedherein are stock production sizes. Consumers shouldconsult with suppliers concerning lists of stock produc-tion sizes.2 COMPARISON TO ISO DOCUMENTSAt this time there are no ISO standards for metricseries threaded rods.3 REFERENCED STAND
36、ARDSUnless otherwise specified, the standards referencedshall be the most recent at the time of order placement.ASME B1.3, Screw Thread Gaging Systems forDimensional Acceptability Inch and Metric ScrewThreads (UN, UNR, UNJ, M, and MJ)ASME B1.13M, Metric Screw ThreadsMProfileASME B18.12, Glossary of
37、Terms for MechanicalFastenersASME B18.18.2, Inspection and Quality Assurance forHigh-Volume Machine Assembly FastenersPublisher: The American Society of MechanicalEngineers (ASME), Three Park Avenue, New York,NY10016-5990;OrderDepartment:22LawDrive,Box2300, Fairfield, NJ 07007-2300 (www.asme.org)AST
38、M A 193/A 193M, Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for HighTemperature or High Pressure Service and OtherSpecial Purpose ApplicationsASTM A 380, Standard Practice for Cleaning, Descaling,and Passivation of Stainless Steel Parts, Equipment,and SystemsASTM F 4
39、68M, Nonferrous Bolts, Hex Cap Screws, andStuds for General Use MetricASTM F 568M, Carbon and Alloy Steel ExternallyThreaded Metric FastenersASTM F 738M, Stainless Steel Metric Bolts, Screws,and StudsASTMF788/F788M,StandardSpecificationforSurfaceDiscontinuities of Bolts, Screws, and Studs, Inch andM
40、etric Series1ASTM F 1470, Standard Practice for Fastener Samplingfor Specified Mechanical Properties and PerformanceInspectionASTMF1941M,ElectrodepositedCoatingsonThreadedFasteners MetricASTM F 2329, Zinc Coating, Hot-Dip, Requirements forApplication to Carbon and Alloy Steel Bolts, Screws,Washers,
41、Nuts, and Special Threaded FastenersPublisher: American Society for Testing and Materials(ASTMInternational),100BarrHarborDrive,P.O.BoxC700, West Conshohocken, PA 19428-2959(www.astm.org)4 TERMINOLOGYFordefinitionsofterminologynotspecificallydefinedin this Standard, refer to ASME B18.12.Continuously
42、 Threaded Rod (Threaded Bar): a cylindricalcontinuously threaded bar with unpointed ends.5 DIMENSIONSDimensionsfor metricthreadedrodare inmillimetersand apply before coating, unless otherwise specified.Table 1 contains the thread diameter and pitch dimen-sions for coarse and fine metric thread sizes
43、 consideredstandard.6 LENGTH6.1 Overall LengthThe length of the threaded rod shall be measured,overall, from end to end.6.2 Length Increments for Metric Threaded RodThreadedrodiscommonlyavailableinlengthsof1m,2m,and3mbutcanusuallybeorderedinotherlengths.The length tolerance on threaded rods of 2 m a
44、nd longershall be 10 mm and 6 mm for nominal lengths lessthan 2 m.7 ENDSThe ends shall be of sufficient workmanship to alloweasy assembly with an appropriate mating nut.ASME B18.31.4M-2009Table 1 Dimensions for Metric Threaded RodDLNominal Coarse Series Fine Series Nominal Coarse Series Fine SeriesD
45、iameters, D Pitch Pitch Note (1) Diameters, D Pitch Pitch Note (1)M1.6 0.35 .M2 0.4 .M2.5 0.45 .M3 0.5 .M3.5 0.6 .M4 0.7 .M5 0.8 .M6 1 .M8 1.25 1M10 1.5 0.751 and1.25M12 1.75 1 and 1.25M14 2 1.5M16 2 1.5M18 2 1.5M20 2.5 1.5M22 2.5 Note (2) 1.5M24 3 2M27 3 .M30 3.5 2M36 4 2M42 4.5 .M48 5 .M56 5.5 .M6
46、4 and larger .Note (3) .NOTES:(1) Standard fine pitch M profile screw threads of ASME B18.31M are not normally available inthreaded rod. Rods with coarse pitch threads are more commonly available than rods with finepitch threads.(2) Very limited use.(3) Threaded rod is not normally available in thes
47、e larger sizes.8 SCREW THREADS8.1 Thread Series and Tolerance ClassThreads shall be metric coarse or fine thread seriestoleranceclass6gconformingtothedimensionsforgen-eral purpose external threads in ASME B1.13M unlessotherwise specified by the purchaser. Thread size limitsprior to plating or coatin
48、g shall be class 6g (GO andNOTGO).Afterplatingorcoating,class6gthreadsshallbe accepted using the size limits of 6g GO (high limit)and 6g NOTGO (low limit). Threadsshall be right-handunless left hand threads are specifically ordered. (Seesection 18.)8.2 Thread GagingUnless otherwise specified by the
49、purchaser, gagingfor screw thread dimensional acceptability shall be inaccordance with Gaging System 21 as specified inASME B1.3.9 STRAIGHTNESSWhen required, straightness limits and the inspectiontechnique to be used to evaluate straightness shall beas agreed upon between purchaser and supplier.210 MATERIAL AND MECHANICAL REQUIREMENTSThe purchaser must specify the applicable specifica-tion for the threaded rod material. The material shallmeet the chemical and mechanical properties of theapplicable specification. Listed below are some of theprimary material specification
