1、SCREW THREADREPRESENTATIONASME Y14.6-2001Revision and Consolidation of ANSI Y14.6-1978 (R1998)and ANSI Y14.6M-1981 (R1998)An American National StandardEngineering Drawing and RelatedDocumentation PracticesASME Y14.6ADOPTION NOTICEASME Y14.6, Screw Thread Representation, was adopted on 2 November 200
2、1 for use by theDepartment of Defense, DoD. Proposed changes by DoD activities must be submitted to theDoD Adopting Activity: Commander, US Army TACOM-ARDEC, ATTN: AMSTA-AR-QAW-E,PicatinnyArsenal,NJ07806-5000.CopiesofthisdocumentmaybepurchasedfromTheAmericanSociety of Mechanical Engineers (ASME), 22
3、 Law Drive, P.O. Box 2900, Fairfield NJ 07007-2900; http:/www.asme.org.Custodians: Adopting Activity:Army AR Army ARNavy SAAir Force 16 (Project DRPR 0361)DLADHReview Activities:Army AT, AV, CE, CR, EA, GL, MI, SM, TENavy AS, CH, EC, MC, OS, SH, TD, YDAir Force 11, 13, 19, 68, 70, 71, 80, 84, 99DLA
4、CC, GS, ISNSANSAMSC N/A AREA DRPRDISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.AN AMERICAN NATIONAL STANDARDSCREW THREADREPRESENTATIONASME Y14.6-2001Revision and Consolidation of ANSI Y14.6-1978 (R1998)and ANSI Y14.6M-1981 (R1998)Date of Issuance: September 23, 200
5、2The next edition of this Standard is scheduled for publication in 2006. Therewill be no addenda or written interpretations of the requirements of thisStandard issued to this edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed
6、under procedures accredited as meeting the criteria forAmerican National Standards. The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate. The proposed code or standard was made a
7、vailable for public reviewand comment that provides an opportunity for additional public input from industry, 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 wit
8、h respect to the validity of any patent rights asserted inconnection with any items mentioned in this document, and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable letters patent, nor assumeany such liability. Users of a code or standard a
9、re expressly advised that determination of thevalidity of any such patent rights, and the risk of infringement of such rights, is entirely theirown responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not tobe interpreted as government or industry
10、 endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued inaccordance with the established ASME procedures and policies, which precludes the issuanceof interpretations by individuals.No part of this document may be reproduced in any for
11、m,in an electronic 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 2002 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.CONTENTSForewo
12、rd vCommittee Roster vi1 General . 11.1 1Scope .1.2 1Application 1.3 1Applicable Documents .1.4 2Definitions 2 Thread Types 22.1 2Straight Threads .2.2 2Taper Threads .2.3 2Acme Threads .2.4 2Stub Acme Threads 2.5 2Buttress Threads .3 Requirements 23.1 2Thread Representation .3.2 7Thread Specificati
13、on .3.3 15Dimensioning Tables1 Thread Series Designations . 32 Designations for UN, UNJ, UNR, and N Thread Series 4Figures1 Simplified Representation of Threads 42 Schematic Representation of Threads 43 Detailed Representation of Threads . 44 Simplified Representation of Assembled Threads . 55 Multi
14、ple Thread Representations of Assembled Parts . 56 Simplified Representation of Helical Coil Inserts . 57 Simplified Representation of Taper Threaded Parts . 58 Simplified Representation of Assembled Tapered Parts . 59 Specifying Incomplete Thread Lengths 610 Specifying Shank and Incomplete Thread L
15、engths . 611 Specifying Incomplete Thread Lengths and Shoulder Fillet Radius 612 Specifying Shank, Unthreaded, and Threaded Lengths and Undercut Diameter . 613 Specifying Bottoming Relief Radii and Lengths . 714 Detailed Representation of Helical Coil Inserts 715 Screw Thread Designation: Unified In
16、ch Screw Thread, Right Hand 816 Screw Thread Designation: Metric External Thread, Right Hand 817 Screw Thread Designation: Metric Internal Thread, Right Hand . 818 Acme Screw Thread Designation . 13iii19 Taper Thread Designation 1420 Specifying External Taper Thread Type and Size 1421 Specifying Int
17、ernal Taper Thread Type and Size . 1422 Specifying External Taper Thread . 1423 Specifying External Thread With Special Gaging 1524 Specifying Internal Taper Thread Designations . 1525 Specifying Internal Thread With Special Gaging . 1526 Specifying Tap Hole, Thread, and Special Gaging . 1527 Specif
18、ying Special Orifice, Standard Tap Hole, and Thread . 1528 Specifying Thread Length 1629 Specifying External Chamfer . 1730 Specifying External Chamfer for Rolled Thread Blanks 1731 Specifying Internal Thread Hole Depth, Size, and Countersink 17ivFOREWORDThis Standard establishes American National S
19、tandard drafting practices for depictingscrew threads on drawings and other documents. It is beyond the scope of this Standardto present engineering and manufacturing specifications for screw threads.The original issue of this Standard was approved on December 13, 1957. It was designatedASA Y14.6-19
20、57, and then redesignated ANSI Y14.6-1957 after the American StandardsAssociation (ASA) became the American National Standards Institute (ANSI) in 1969. The1957 document was revised and approved as an American National Standard on July 26,1978. It was designated ANSI Y14.6-1978. A metric supplement
21、was approved on September21, 1981 and was designated ANSI Y14.6aM-1981.This revision consolidates the metric supplement, Y14.6aM, and the basic Y14.6 Standard.It also updates these standards in accordance with the latest issues of ASME B1 seriesScrew Thread Standards, and provides corrections where
22、necessary.Suggestions for the improvement of this Standard will be welcome. They should be sentto The American Society of Mechanical Engineers, Attn: Secretary, Y14 Main Committee,Three Park Avenue, New York, NY 10016-5990.This revision was approved as an American National Standard on November 2, 20
23、01.vASME STANDARDS COMMITTEE Y14Engineering Drawing andRelated Documentation Practices(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSF. Bakos, Jr., ChairK. E. Wiegandt, Vice ChairC. J. Gomez, SecretaryCOMMITTEE PERSONNELA. R. Anderson, Dimensional Con
24、trol System, Inc.J. B. Baker, Textron AutomotiveF. Bakos, Jr., Eastman Kodak Co.D. E. Bowerman, Copeland Corp.J. V. Burleigh, The Boeing Co.R. A. Chadderdon, Southwest ConsultantsM. E. Curtis, Jr., Rexnord Corp.D. E. Day, Monroe Community CollegeC. W. Ferguson, WM Education ServicesL. W. Foster, L.
25、W. Foster Associates, Inc.C. J. Gomez, The American Society of Mechanical EngineersB. A. Harding, Purdue UniversityK. S. King, Naval Surface Warfare Center, Dahlgren DivisionA. Krulikowski, General Motors PowertrainH. S. Lachut, ABB Combustion Engineering Inc.J. G. Liska, Aerojet Propulsion, Divisio
26、n of GencorpP. J. McCuistion, Ohio UniversityP. E. McKim, Caterpillar, Inc.E. Niemiec, MTD Products, Inc.R. L. Nieukirk, Alternate, Caterpillar, Inc.R. L. Rickman, Oklaloosa-Walton Community CollegeR. W. Stockdale, ConsultantR. P. Tremblay, U. S. Department of the Army, ARDECG. H. Whitmire, Gary Whi
27、tmire AssociatesK. E. Wiegandt, Sandia National LaboratoryB. A. Wilson, The Boeing Co.P. Wreede, Raytheon Systems Co.SUBCOMMITTEE 6SCREW THREADREPRESENTATIONB. A. Harding, Chair, Purdue UniversityD. A. Clever, Deere and Co.A. Herskovitz, ConsultantE. Schwartz, ConsultantG. H. Whitmire, ConsultantviA
28、SME Y14.6-2001ENGINEERING DRAWING AND RELATED DOCUMENTATION PRACTICESSCREW THREAD REPRESENTATION1 GENERAL1.1 ScopeThis Standard establishes requirements for pictorialrepresentation, specification, and dimensioning of screwthreads on drawings; it is not concerned with standardsfor dimensional control
29、 of screw threads. Informationhelpful in the design and selection of screw threadsto meet specific requirements is included in the B1series of the ASME Standards for Screw Threads (seepara. 1.3).1.2 ApplicationStraight Unified inch (UN/UNR/UNJ form) and met-ric (M/MJ form) screw threads are emphasiz
30、ed in thisStandard in consideration of their wide use and generalpurpose applications. The same drafting practices applyto straight and taper threads, Acme, Stub Acme, But-tress, thread insert, and interference fit threads exceptfor differences noted.1.3 Applicable DocumentsThe following documents f
31、orm a part of this Standardto the extent specified herein. The latest edition shallapply.AS 71051, Pipe Threads, Taper, Aeronautical NationalForm, Symbol ANPT, Design and Inspection StandardPublisher: Society of Automotive Engineers (SAE), 400Commonwealth Drive, Warrendale, PA 15096-0001ASME B1.1, U
32、nified Inch Screw Threads (UN andUNR Thread Form)ASME B1.3M, Screw Thread Gaging Systems forDimensional Acceptability-Inch and Metric ScrewThreads (UN, UNR, M, and MJ)ASME B1.5, Acme Screw ThreadsASME B1.7M, Nomenclature, Definitions, and LetterSymbols for Screw ThreadsASME B1.8, Stub Acme Screw Thr
33、eadsASME B1.9, Buttress Inch Screw Threads1ASME B1.10M, Unified Miniature Screw ThreadsASME B1.11, Microscope Objective ThreadASME B1.12, Class 5 Interference-Fit ThreadASME B1.13M, Metric Screw Threads M ProfileASME B1.15, Unified Inch Screw Threads (UNJ ThreadForm)ASME B1.20.1, Pipe Threads, Gener
34、al Purpose (Inch)ASME B1.20.3, Dryseal Pipe Threads (Inch)ASME B1.20.7, Hose Coupling Screw Threads (Inch)ASME B1.21M, Metric Screw Threads: MJ ProfileASME B18.29.1, Helical Coil Screw Thread Inserts(Inch Series)ASME B18.29.2M, Helical Coil Screw Thread Inserts(Metric Series)ASME Y14.5M, Dimensionin
35、g and TolerancingPublisher: The American Society of Mechanical Engi-neers (ASME International), Three Park Avenue, NewYork, NY 10016-5990; ASME Order Department: 22Law Drive, Box 2300, Fairfield, NJ 07007-2300CGA V-1, Compressed Gas Cylinder Valve Outlet andInlet ConnectionsPublisher: Compressed Gas
36、 Association (CGA), 4221Walney Road, Chantilly, VA 20151-2923FED-STD-H28, Screw-Thread Standards for FederalServicesFED-STD-H28/2, Unified Inch Screw Threads UNand UNR Thread FormsFED-STD-H28/5, Unified Miniature Screw ThreadsFED-STD-H28/7, Pipe Threads, General PurposeFED-STD-H28/8, Dryseal Pipe Th
37、readsFED-STD-H28/9, Gas Cylinder Valve Outlet and InletThreadsFED-STD-H28/10, Hose Coupling and Fire Hose Cou-pling Screw ThreadsFED-STD-H28/12, Acme ThreadsFED-STD-H28/13, Stub Acme ThreadsFED-STD-H28/14, Buttress Screw Threads 7/45Flank AnglesFED-STD-H28/16, Microscope Objective and Nose-piece Thr
38、eads, 0.8000-36AMOSCREW THREAD REPRESENTATIONASME Y14.6-2001FED-STD-H28/21, Metric Screw-ThreadsFED-STD-H28/23, Class 5 Interference-Fit ScrewThreadsPublisher: Defense Printing Detachment Office, 700Robbins Avenue, Building 4D, Philadelphia, PA19111-5094.1.4 DefinitionsDefinitions of terms are in ac
39、cordance with ASMEB1.7M and the applicable standard.2 THREAD TYPES2.1 Straight ThreadsStraight 60 deg screw thread designations for draw-ings are based on ASME B1.1, ASME B1.15, ASMEB1.13M, ASME B1.21M, and ASME B1.10M. Straightpipe thread standards are covered in the documentscited in para. 2.2.2.2
40、 Taper ThreadsTaper pipe thread designations for drawings are basedon ASME B1.20.1 (General Purpose) and ASMEB1.20.3 (Dryseal).NOTE: Pipe threads are designated in established trade sizes, whichsignify a nominal diameter only.2.2.1 Taper Pipe Thread Features. General pur-pose pipe thread forms allow
41、 crest and root interferenceor clearance when the flanks contact. When a clearanceoccurs, unless filled with a lute or sealer, a spiralpassage will exist through which leakage can occur.The dryseal pipe thread form does not allow suchclearance, but rather has crest and root metal-to-metalcontact or
42、interference when the flanks contact. It isthis feature that eliminates the need for a lute or sealerto provide for leak-proof assemblies.2.2.2 General Purpose Taper Pipe Thread Se-ries. General purpose taper pipe thread requirementsare specified in ASME B1.20.1. Included are taperthreads designated
43、 as NPT and NPTR. See Table 1for designations and definitions.NOTES:(a) Straight pipe threads NPSC, NPSL, and NPSM are also includedin ASME B1.20.1.(b) Aeronautical taper pipe threads specified in MIL-P-7105 weredesignated ANPT. MIL-P-7105 is no longer active, but SAE AS71051 replaces it.22.2.3 Drys
44、eal Pipe Thread Series. Dryseal pipethreads are specified in ASME B1.20.3. Included aretaper dryseal pipe threads designated NPTF-1, NPTF-2, and PTF-SAE Short Series. See Table 1 for designa-tions and definitions.NOTE: Internal straight dryseal pipe threads NPSF and NPSI arealso included in ASME B1.
45、20.3.2.3 Acme ThreadsAcme screw thread drawing practices are based onASME B1.5. Included are general purpose threads,where there is clearance on flanks and at major/minordiameters, and centralizing threads, where clearance atthe major diameter is limited. See Table 1.2.4 Stub Acme ThreadsStub Acme s
46、crew thread drawing practices are basedon ASME B1.8. See Table 1.2.5 Buttress ThreadsButtress screw thread drawing practices are basedon ASME B1.9. The Buttress thread is designated“BUTT” for external thread pulls or “PUSH-BUTT”for external thread pushes. See Table 1.3 REQUIREMENTSRepresentation, sp
47、ecification, and dimensioning ofthreads shall be in accordance with the following para-graphs.3.1 Thread RepresentationThree methods in general use for representing screwthreads on drawings are as follows: simplified in Fig.1, schematic in Fig. 2, and detailed in Fig. 3. Onemethod is generally used
48、within any one drawing. Whenrequired, all three methods may be used. See Figs. 4and 5.3.1.1 Simplified Representation. The simplifieddrawing method is recommended for straight and tapered60 deg form, Acme, Stub Acme, Buttress, helical coilinsert, and other thread forms except where detailedrepresent
49、ations are required. See para. 3.1.3 and Figs.1, 6, 7, and 8.3.1.1.1 Representation of the vanish (runout)thread should be indicated with the fully formed threadwhether or not it is to be controlled. See Fig. 1. Whenessential to design requirements, the vanish threadSCREW THREAD REPRESENTATION ASME Y14.6-2001TABLE 1 THREAD SERIES DESIGNATIONSDesignation Note (1) Thread Series ReferenceFED-STD-H28ASME SectionACME C Acme threads, centralizing B1.5 /12ACME G Acme threads, general purpose (see also STUB B1.5 /12ACME)AMO Microscope objective threads B1.11 /
