1、IS0 general purpose screw threads - Basic profile Part 1 : Metric screw threads (IS0 68-1 : 1998) ICs 21.040.1 O DIN IS0 68-1 - This standard, together with DIN 13-1 9, November 1999 edition, supersedes DIN 13-1 9, December 1986 edition. Metrisches ISO-Gewinde allgemeiner Anwendung - Grundprofil - T
2、eil 1 : Metrisches Gewinde (IS0 68-1 : 1998) This standard incorporates International Standard IS0 68-1 IS0 general purpose screw threads - Basic profile - Part 1 : Metric screw threads. A comma is used as the decimal marker. National foreword This standard has been prepared by ISO/TC 1. The respons
3、ible German body involved in its preparation was the Normenausschu Technische Grundlagen (Fundamentals in Technology Standards Committee). DIN IS0 965-1 and DIN 2244 are the standards corresponding to International Standards IS0 965-1 and IS0 5408, respectively, referred to in clause 2 of the IS0 St
4、andard. Amendments DIN 13-19, December 1986 edition, has been superseded by the specifications of DIN IS0 68-1 Previous editions DIN 13-30: 1960-08, 1964-06; DIN 13-19: 1972-05, 1986-12. National Annex NA Standards referred to (and not included in Normative references) DIN 2244 DIN IS0 965-1 Screw t
5、hreads - Terminology IS0 general purpose metric screw threads - Tolerances - Part 1 : Principles and basic data (IS0 965-1 : 1998) IS0 Standard comprises 3 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN IS0 68-1 : 1999-1 V Deutsches Institut fr Normung
6、 e. V., Berlin. uth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). - . English price group 05 Sales No 0405 04 O0 Page 1 IS0 68-1 : 1998 IS0 general purpose screw threads - Basic profile Part 1 : Metric screw threads Foreword IS0 (the International Or
7、ganization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been establ
8、ished has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizati
9、on. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 YO of the member bodies casting a vote. International Standard IS0 68-1 was prepared by Technical Committee
10、ISOTTC 1, Screw threads, Subcommittee SC 1, Basic data. This first edition, together with IS0 68-2, cancels and replaces IS0 68:1973 which has been technically revised by separating the metric dimensions from the imperial dimensions. IS0 68 consists of the following parts under the general title IS0
11、 general purpose screw threads - Basic profile - Part 7: Metric screw threads - Part 2: Inch screw threads 1 Scope This part of IS0 68 specifies the basic profile for IS0 general purpose metric screw threads (M). 2 Normative references The following standards contain provisions which, through refere
12、nce in this text, constitute provisions of this part of IS0 68. At the time of publication the editions indicated were valid. All standards are subject to revision and parties to agreements based on this part of IS0 68 are encouraged to investigate the possibility of applying the most recent edition
13、s of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 965-1 :1998, IS0 general purpose metric screw threads - Tolerances - Part I: Principles and basic data. IS0 5408: 983, Cylindrical screw threads - Vocabulary. 3 Definitions F
14、or the purpose of this part of IS0 68 the definitions given in IS0 5408 apply. Only the term “basic profile“ which might be usefully restated is defined below. 3.1 basic profile The theoretical profile of a screw thread in an axial plane defined by theoretical dimensions and angles common to interna
15、l and external threads NOTE The basic profile is shown as a thick line in figure 1. Page 2 IS0 68-1 : 1998 I o6 where D d D2 d2 Dl 4 H P is the basic major diameter of internal thread (nominal diameter) is the basic major diameter of external thread (nominal diameter) is the basic pitch diameter of
16、internai thread is the basic pitch diameter of external thread is the basic minor diameter of internal thread is the basic minor diameter of external thread is the height of fundamental triangle is the pitch Figure 1 4 Dimensions The fundamental deviations and tolerances specified in IS0 965-1 are a
17、pplied to the dimensions of the basic profile shown in figure 1 and derived from table 1. H=- P = 0,866 025 404 P 2 5 - H = 0,541 265 877 P 8 3 -H = 0,324 759 526 P 8 - 0,216 506 351 P H 4 H -=0,108253175 P 8 _- Page 3 IS0 68-1 : 1998 Table 1 Dimensions in millimetres Pitch P 02 0,25 03 0,35 0,4 0,4
18、5 03 06 0,7 0,75 03 1 1,25 15 1,75 2 2,5 3 33 4 43 5 53 6 8 H 0,173 205 0,216 506 0,259 808 0,303 109 0,346 41 O 0,389 71 1 0,433 O1 3 0,519 61 5 0,606 21 8 0,649 51 9 0,692 820 0,866 025 1,082 532 1,299 038 131 5 544 1,732 051 2,165 063 2,598 076 3,031 089 3,464 102 3,897 114 4,330 127 4,763 140 5,
19、196 152 6,928 203 5 -H 8 0,108 253 0,135 316 0,162 380 0,189 443 0,216 506 0,243 570 0,270 633 0,324 760 0,378 886 0,405 949 0,433 013 0,541 266 0,676 582 0,811 899 0,947 21 5 1,082 532 1,353 165 1,623 798 1,894 431 2,165 063 2,435 696 2,706 329 2,976 962 3,247 595 4,330 127 3 -H 8 0,064 952 0,081 1
20、90 0,097 428 0,113 666 0,129 904 0,146 142 0,162 380 0,194 856 0,227 332 0,243 570 0,259 808 0,324 760 0,405 949 0,487 139 0,568 329 0,649 51 9 0,811 899 0,974 279 1,136 658 1,299 038 1,461 418 1,623 798 1,786 177 1,948 557 2,598 076 H 4 - 0,043 301 0,054 127 0,064 952 0,075 777 0,086 603 0,097 428
21、0,108 253 0,129 904 0,151 554 O, 162 380 0,173 205 0,216 506 0,270 633 0,324 760 0,378 886 0,433 O1 3 0,541 266 0,649 51 9 0,757 772 0,866 025 0,974 279 1,082 532 1,190 785 1,299 038 1,732 051 H 8 - 0,021 651 0,027 063 0,032 476 0,037 889 0,043 301 0,048 71 4 0,054 127 0,064 952 0,075 777 0,081 190 0,086 603 0,108 253 0,135 316 O, 162 380 0,189 443 0,216 506 0,270 633 0,324 760 0,378 886 0,433 O1 3 0,487 139 0,541 266 0,595 392 0,649 519 0,866 025
