1、AN AMERICAN NATIONAL STANDARDASME B18.31.3-2009Threaded Rods (Inch Series)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.31.3-2009Threaded Rods(Inch Series)AN AMERICAN NATIONAL STANDARDC
2、opyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: December 23, 2009This Standard will be revised when the Society approves the issuance of a new edition. There willbe no addenda iss
3、ued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisdocument. Periodically, certain actions of the ASME B18 Committee may be published as Cases.Cases and interpretations are published on the ASME Web site under the Committee Pages athtt
4、p:/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 the code or standard w
5、as 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,regulatory agencies, and
6、 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 does not undertake to insu
7、re anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights, and the risk of infringement of such rights, isentirely the
8、ir own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with t
9、he 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 Society of Mechanical En
10、gineersThree Park Avenue, New York, NY 10016-5990Copyright 2009 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CO
11、NTENTSForeword ivCommittee Roster . vCorrespondence With the B18 Committee vi1 Introduction . 12 General Data 1Figure1 Threaded Rod Dimensions 2iiiCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-F
12、OREWORDThere was significant interest in developing this Standard due to the antidumping investigationsby the U.S. Department of Commerce and the U.S. International Trade Commission that weretaking place simultaneously. The investigations resulted in anti-dumping tariffs being appliedto a significan
13、t portion of threaded rods used in the United States.Members of the Subcommittee recognized that there would be a lot of new threaded rodmanufacturers appearing in the market and that the industry needed a standard to reference onpurchasing documents. The Fastener Industry Education Group cites refe
14、rencing standards asone of the most important criteria for preventing a poor quality or wrong product from enteringthe supply chain.On June 19, 2009, ASME B18.31.3 was approved by B18 Subcommittee 31 and by theB18 Standards Committee. This Standard was approved by the American National StandardsInst
15、itute on November 10, 2009.ivCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18 COMMITTEEStandardization of Bolts, Nuts, Rivets, Screws,Washers, and Similar Fasteners(The following is the ro
16、ster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSD. A. Clever, ChairR. D. Strong, Vice ChairR. L. Crane, SecretarySTANDARDS COMMITTEE PERSONNELV. Cartina, Continental-AeroD. A. Clever, Deere and Co.A. P. Cockman, Ford Motor Co.B. D. Brunside, Alternate, For
17、d Motor Co.R. L. Crane, The American Society of Mechanical EngineersA. C. Dicola, Wrought Washer Co.B. A. Dusina, Federal Screw WorksJ. S. Foote, Contributing Member, Trade Association Management,Inc.D. S. George, ND IndustriesJ. Greenslade, Industrial Fasteners InstituteJ. J. Grey, Contributing Mem
18、ber, Fastener Consulting Services, Inc.B. Hasiuk, Contributing Member, Defense Supply CenterPhiladelphiaA. Herskovitz, ConsultantJ. Hubbard, Contributing Member, Rockford Fastener, Inc.J. Jennings, Contributing Member, Naval Surface Warfare CenterM. Keller, Contributing Member, ConsultantSUBCOMMITTE
19、E 31 THREADED STUDSW. K. Wilcox, Chair, ConsultantC. A. Dugal, Vice Chair, Texas Screw ProductsR. L. Crane, Secretary, The American Society of MechanicalEngineersJ. F. Braden, Fasteners UnlimitedD. A. Clever, Deere and Co.D. S. George, ND IndustriesJ. Greenslade, Industrial Fasteners InstituteA. Her
20、skovitz, ConsultantvJ. F. Koehl, Contributing Member, Spirol International Corp.W. H. Kopke, ConsultantJ. G. Langenstein, Honorary Member, ConsultantW. J. Lutkus, Heli Coil EmhartD. McCrindle, Canadian Fasteners InstituteM. D. Prasad, Contributing Member, General Motors Corp.W. L. Sakowski, Account
21、Managers, LLCS. Savoji, ITW MedalistW. Schevey, Contributing Member, BGM Fastener Co., Inc.W. R. Stevens, RamcoR. D. Strong, General Motors Corp.S. W. Vass, ConsultantC. B. Wackrow, Contributing Member, MNP Corp.W. K. Wilcox, ConsultantC. B. Williamson, Fastenal Co.C. J. Wilson, ConsultantR. B. Wrig
22、ht, Contributing Member, Wright Tool Co.J. G. Zeratsky, National Rivet and Manufacturing Co.J. Jennings, Naval Surface Warfare CenterJ. F. McCarrick, Defense Supply Center PhiladelphiaR. B. Meade, Atrona Material Testing Laboratories, Inc.W. Schevey, BGM Fastener Co., Inc.G. M. Simpson, Semblex Corp
23、.W. R. Stevens, RamcoR. D. Strong, General Motors Corp.C. B. Wackrow, MNP Corp.C. B. Williamson, Fastenal Co.C. J. Wilson, ConsultantCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CORRESPONDENCE
24、WITH THE B18 COMMITTEEGeneral. ASME standards are developed and maintained with the intent to represent theconsensus of concerned interests. As such, users of this Standard may interact with the Committeeby requesting interpretations, proposing revisions, and attending Committee meetings.Corresponde
25、nce should be addressed to:Secretary, B18 Standards CommitteeThe American Society of Mechanical EngineersThree Park AvenueNew York, NY 10016-5990Proposing Revisions. Revisions are made periodically to the Standard to incorporate changesthat appear necessary or desirable, as demonstrated by the exper
26、ience gained from the applicationof the Standard. Approved revisions will be published periodically.The Committee 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
27、 reasons for the proposal, including any pertinent documentation.Proposing a Case. Cases may be issued for the 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.
28、Cases are effective immediately upon ASMEapproval and shall be posted on the ASME Committee Web page.Requests for Cases shall provide a Statement of Need and Background Information. The requestshould identify the standard, the paragraph, figure or table number(s), and be written as aQuestion and Rep
29、ly in the same format as existing Cases. Requests for Cases should also indicatethe applicable edition(s) of the 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
30、 only be rendered in response to a writtenrequest sent to the Secretary of the B18 Standards Committee.The request 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 n
31、umber(s) and the topic of the inquiry.Edition: Cite the applicable edition of the Standard for which the interpretation isbeing requested.Question: Phrase the question as a request for an interpretation of a specific requirementsuitable for general understanding and use, not as a request for an appr
32、ovalof a proprietary design or situation. The inquirer may also include any plansor drawings that are necessary to explain the question; however, they shouldnot contain proprietary names or information.Requests that are not in this format may be rewritten in the appropriate format by the Committeepr
33、ior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to t
34、he cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B18 Standards Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any
35、meeting should contact the Secretary ofthe B18 Standards Committee.viCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.31.3-2009THREADED RODS (INCH SERIES)1 INTRODUCTION1.1 ScopeThis Standa
36、rd covers the complete general and dimen-sional data for inch series threaded rods recognized asAmerican National Standard. Included are diameters#4 through 4 in. UNC, UNF, 8UN, and ACME in bothright- and left-handed threads.At this time, there are no ISO standards for inchthreaded rods.The inclusio
37、n of dimensional data in this Standard 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.1.2 DimensionsAll dimensions in this Standard are in inches, unlessotherwise specifie
38、d.1.3 TerminologyAll terms used in this Standard are defined inASME B18.12.1.4 Referenced StandardsUnless otherwise specified, the standards referencedshall be the most recent at the time of order placement.ASME B1.1, Unified Inch Screw Threads (UN andUNR Thread Form)ASME B1.3M, Screw Thread Gaging
39、Systems forDimensional Acceptability Inch and Metric ScrewThreads (UN, UNR, UNJ, M, and MJ)ASME B1.5, Acme Screw ThreadsASME B18.12, Glossary of Terms for MechanicalFastenersASME B18.18.2, Inspection and Quality Assurance forHigh-Volume Machine Assembly FastenersASME B18.24, Part Identifying Number
40、(PIN) CodeSystem Standard for B18 Fastener ProductsPublisher: The American Society of MechanicalEngineers (ASME), Three Park Avenue, New York,NY 10016; Order Department: 22 Law Drive, Box 2300,Fairfield, NJ 07007-2300 (www.asme.org)ASTM A 193/A 193M, Standard Specification forAlloy-Steel and Stainle
41、ss Steel Bolting Materials forHigh Temperature or High Pressure Service and OtherSpecial Purpose Applications1ASTM A 307, Carbon Steel Bolts and Studs, 60 000 PSITensile StrengthASTM A 380, Standard Practice for Cleaning, Descaling,and Passivation of Stainless Steel Parts, Equipment,and SystemsASTM
42、F 468, Standard Specification for NonferrousBolts, Hex Cap Screws, and Studs for General UseASTM F 593, Standard Specification for Stainless SteelBolts, Hex Cap Screws, and StudsASTM F 788/F 788M, Standard Specification for SurfaceDiscontinuities of Bolts, Screws, and Studs, Inch andMetric SeriesAST
43、M F 1470, Standard Practice for Fastener Samplingfor Specified Mechanical Properties and PerformanceInspectionASTM F 1554, Anchor Bolts, Steel, 36, 55, and 105-ksiYield StrengthASTM F 1941, Electrodeposited Coatings on ThreadedFasteners (Unified Inch Screw Threads (UN/UNR)Publisher: American Society
44、 for Testing and Materials(ASTM International), 100 Barr Harbor Drive,P.O. Box C700, West Conshohocken, PA 19428(www.astm.org)2 GENERAL DATA2.1 LengthThreaded rods are commonly produced in, but notlimited to, 3-ft, 6-ft, 10-ft, and 12-ft lengths. The lengthof the threaded rod shall be measured, over
45、all, from endto end. The length tolerance on all threaded rods innominal lengths of 6 ft and longer shall be 12in. and14in. for nominal lengths less than 6 ft. See Fig. 1.2.2 ThreadsUnified threads shall conform to the requirements ofASME B1.1. For UNC and UNF threads, Class 1A willbe furnished unle
46、ss otherwise specified. Plated threadsshall conform to ASME B1.1, Class 3A high limit (basic)and the low limit requirement of the before-coated orplated thread class. Class 2A threads shall be used on8 UN threads and at the manufacturers option for otherseries, and for sizes where 1A is not applicab
47、le.ACME threads shall meet the requirements of ASMEB1.5, Class 2G, unless otherwise specified.2.3 Thread Acceptance GagingUnless otherwise specified by the purchaser, gagingfor screw thread dimensional acceptability shall be inaccordance with Gaging System 21 as specified in ASMEB1.3M.Copyright ASME
48、 International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.31.3-2009Fig. 1 Threaded Rod DimensionsLD2.4 EndsThe ends shall be of sufficient workmanship to allowfor easy assembly with an appropriate mating nut.2.5
49、 StraightnessWhen required, straightness limits and the inspectiontechnique to be used to evaluate straightness shall beagreed upon between the purchaser and the supplier.2.6 Materials and Mechanical RequirementsThere are four primary designations for threaded rodmaterials. Other materials may be specified by thepurchaser.2.6.1 Steel. Unless otherwise s
