1、Errata MARCH 1997 to ASME Bl.15-1995 Unified Inch Screw Threads(UNJ Thread Form)The Errata corrections listed below and appearing herein apply to ASME B 1.15-1 995,Unified Inch Screw Threads(UNJ Thread Form).Corrections are incorporated directly into the affected pages and are indicated by a margin
2、note,(E).The pages show the corrections given below.The pages not listed are the reverse sides of the listed pages and contain no changes.Page Location Change I 1.1 In fourth line.0.600 changed to 0.060 4 Fig.2(I)Dl rnax.changed to D2 max.(2)Dl min.=D2 bsc changed to D2 min.=D2 bsc(3)TD1/2 changed t
3、o TD212 5 Fig.3(I)dl max.=dl bsc changed to d2 max.=d2 bsc(2)dl min.changed to d2 min.(3)Td112 changed to Td212(4)In General Note.(See para.5.3)changed to read:(See para.2.3)Fig.4 Sentence added to Note(I)reading:X equal or greater than 0.1501 1 P.In fourth line,length changed to read:lengths In sec
4、ond line,delete(7 )In second Example,fourth line,Lead tolerance of 0.0 0 9 .in.changed to 0.0009 in.In Example,fourth line,0.009 changed to 0.0009 Under MINOR DIAMETER:(I)dl basic minor diameter changed to dl bsc basic minor diameter(2)dl maximum minor diameter changed to dl max maximum minor diamet
5、er THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS 345 East 47th Street,New York,NY 10017 Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 12:46:31 MSTNo reproduction or networking permitted with
6、out license from IHS-,-,-Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 12:46:31 MSTNo reproduction or networking permitted without license from IHS-,-,-(El 1.1 Scope UNIFIED INCH SCREW THRE
7、ADS(UNJ THREAD FORM)SECTION 1 GENERAL 1 This Standard establishesthe basic triangular pro-file for the UNJ thread form,provides a system of designations,lists the standard series of diameter-pitch combinations for diameters from 0.060 to 6.000 in.,and specifies limiting dimensions and tolerances.It
8、specifies the characteristics of the UNJ inch series of threads having 0.1501 1P to 0.18042P designed ra-dius at the root of the external thread,and also having the minor diameter of the external and internal threads increased above the ASME B1.l UN and UNR thread forms to accommodate the external t
9、hread maximum root radius.1 1.2 Field of Application The UNJ screw thread is designed for aerospace inch threaded parts,or for use on other highly stressed applications requiring high fatigue strength.For aero-space applications,only Classes 3A and 3B should be used.1.4 Federal Government Use When t
10、his Standard is approved by the Department of Defense and federal agencies and is incorporated into FED-STD-H28/4,Screw Thread Standards for Federal Services,Section 4,the use of this Standard by the federal government is subject to all the re-quirements and limitations of FED-STD-H28/4.1.5 Referenc
11、es The latest issues of the following documents form a part of this Standard to the extent specified herein.American National Standards ASME B1.l,Unified Inch Screw Threads(UN and UNR Thread Form)ASME B1.3M,Screw Thread Gaging Systems for Dimensional Acceptability ANSI/ASME B1.7M,Nomenclature,Defini
12、tions,and Letter Symbols for Screw Threads ASME B1.23,Gages and Gaging for Unified Inch J Series Screw Threads 1.3 Assembly ASME B1.30M,Screw Threads-Standard Prac-Threads conforming to the UN profile(ASME B1 tice for Calculating and Rounding Dimensions-and the UNJ profile are not interchangeable be
13、cause of possible interference between the UNJ external I thread minor diameter and the UN internal thread minor diameter.However,the UNJ internal thread Proposed ASME Standard under development by The Amer-will assemble with the UN external thread.ican Society of Mechanical Engineers.Copyright ASME
14、 International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 12:46:31 MSTNo reproduction or networking permitted without license from IHS-,-,-Copyright ASME International Provided by IHS under license with ASME License
15、e=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 12:46:31 MSTNo reproduction or networking permitted without license from IHS-,-,-UNIFIED INCH SCREW THREADS(UNJ THREAD FORM)SECTION 2 PROFILE OF THREAD 2.1 Basic Profile The basic profile is the theoretical profile corr
16、e-I sponding to the basic dimensions of the thread major diameter,pitch diameter,and minor diameter.Profile applies to an axial plane.The basic profile is shown in Fig.1.2.2 Basic Thread Profile Symbols The symbols used in the basic profile shown in Fig.1 represent the following:D bsc=basic major diameter of internal thread D2 bsc=basic pitch diameter of internal thread Dl bsc=basic minor diameter of internal thread d bsc=basic major diameter of external thread d2 bsc=basic pitch diameter of ext
