1、STDmBSI ES EN IS0 L47B-ENGL 2000 Lb24669 OBL822L TYb BRITISH STANDARD Thpping screw thread The European Standard EN IS0 14781999 has the status of a British Standard ICs 21.040.30 BS EN IS0 1478:2000 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD*BSI BS EN IS0 L478-ENGL Z
2、OO0 W 1624bb9 0818222 982 BS EN IS0 14782000 been prepared under the direction of the Engineering AmdNo. Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 January 2000 O BSI 01-ZOO0 ISBN O 580 35009 6 National foreword Date Comments This Briti
3、sh Standard is the English language version of EN IS0 14781999. It is identical with IS0 14781999. It supersedes BS EN IS0 14781995 which is withdrawn. The UK partkipation in its preparation was entrusted by Technical Committee FME/s, Bolts, nuts and accessories, to Subcommittee FME/9/2, Slotted and
4、 recessed head screws, which has the responsibility to: - aid enquirers to undersand the text; - present to the responsible intemationaUEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests - monitor related international and European developments
5、 and promulgate informed; them in the UK A list of organizations represented on this Subcommittee can be obtained on request to its secrelay. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normaiiy include an annex which lists nonnative references to internationai pub
6、lications with their correspondmg European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Intemational Standards Correspondence Index”, or by using the “Fi
7、nd” fadity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal
8、obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreward page, the IS0 title page, page ii, pages 1 to 3 and a back cover. The BSI copyright notice &played in this document indicates when the document was last issued. STD-
9、BSI BS EN IS0 1478-ENGL 2000 m 1b24bb 0838223 819 = EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 1478 August 1999 ICs 21.040.00 Supersedes EN IS0 1478:1994 English version Tapping screw thread (IS0 1478: 1999) Filetage de vis tle (IS0 1478:1999) Blechschraubengewinde (IS0 1478:1999) This
10、 European Standard was approved by CEN on 16 July 1999. CEN members are bound to comply with the CEWCENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibqraphicai references conc
11、erning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, Gennan). A version in any other language made by translation under the responsibility of a CEN member into its own
12、 language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands. Norway, Portugal. Spain, Swe
13、den, Swkzeriand and United Kingdom. EUROPEAN COMMITEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FOR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels O 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
14、Members. Ref. No. EN IS0 14781999 E STDOBSI BS EN IS0 L478-ENGL 2000 3b24bb9 O838224 755 EN IS0 1478:1999 Foreword The text of the Intemational Standard IS0 1478:1999 has been prepared by Technical Committee ISOTTC 2 “Fasteners“ in collaboration with Technical Committee CEWC 185 “Threaded and non- t
15、hreaded mechanical fasteners and accessories“, the secretariat of which is held by DIN. This European Standard supersedes EN IS0 1478:1994. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February
16、 2000, and conflicting national standards shall be withdrawn at the latest by February 2000. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Fin
17、land, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTE FROM CEWCS: The foreword is susceptible to be amended on reception of the German language version. The confirmed or amended foreword, and when app
18、ropriate, the normative annex ZA for the references to international publications with their relevant European publications will be circulated with the German version. Endorsement notice The text of the International Standard IS0 1478:1999 was approved by CEN as a European Standard without any modif
19、ication. STD=BSI BS EN IS0 1478-ENGL 2000 1b24bb9 0818225 691 W EN IS0 1478:1999 INTERNATIONAL STANDARD IS0 1478 Second edition 1999-08-01 Tapping screws thread Filetage de vis 4 tle Reference number IS0 1478: 1999(E) STDaBSI BS EN IS0 1478-ENGL 2000 m lb24bb9 O81822b 528 m EN IS0 1478:1999 Foreword
20、 IS0 (the International Organization 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
21、 committee has been established 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 elec
22、trotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires
23、approval by at least 75 % of the member bodies casting a vote. International Standard IS0 1478 was prepared by Technical Committee ISO/TC 2, Fasteners. This second edition cancels and replaces the first edition (IS0 1478:1983) which has been technically revised. II STD-BSI BS EN IS0 3478-ENGL 2000 L
24、b2YbbS 0838227 464 EN IS0 1478:1999 Tapping screws thread 1 Scope This International Standard specifies the thread and thread ends for tapping screws (sheet metal screws) with thread sizes from ST1,5 to ST9,S inclusive. 2 Dimensions See Figures 1 and 2 and Table 1. Thread (ST) a Slight radius Thread
25、 profile Figure 1 - Thread dimensions 1 STD*BSI BS EN IS0 LY?B-ENGL 2000 = Lb24bb7 0818228 3TO M EN IS0 1478:1999 Cone end, type Ca Flat end, type F Rounded end, type R I- -1 a No extrusion of excess metal beyond the apex of the type C cone end resulting from thread rolling shall be permissible. A s
26、light rounding or truncation of the point is desirable. Figure 2 - Thread ends 2 STDeBSI BS EN IS0 1478-ENGL 2000 1b24bb9 0818229 237 = EN IS0 1478:1999 Thread size min. dl d2 max. 0,91 1,24 min. 0,84 1,17 d3 max. 0,79 1,12 min. 0,69 1,OZ C max. 0,l 0,l ra y ref.b Type C 1,4 1,6 k - Type F 1,l 1,2 T
27、ype R - Numberc o1 Table 1 - Dimensions Dimensions in millimetres 1 I 2,101 2,43 I 2,761 3,121 3,35 I I l I 1,631 1,90 2,182,3gr2,64 I I I I 1,80 2,08 2,29 2,51 1,73 2,Ol 2,21 2,41 1,60 1,88 2,08 2,26 0,l 0,l 0,l 0,l 05 2,3 2,6 3 3,2 1,8 2,l 2,5 2,5 2,7 - - i3 4 5 6 1,3 1 1,4 1 1.6 1 1,8 1 1,8 1 2,l
28、 1 2,l 3,91 4,22 4,80 5,46 6,25 8,OO 9,651 I 3,73 4,04 4,62 5,28 6,03 7,7a 9,43 6,20 735 5,99 7,59 5,84 7,44 5,64 7,24 0,15 0,15 171 1,4 7,5 8 , 4-2 42 I , 6,3 - 1 16 20 _ a Dimension ris a reference and has been provided for guidance only. The end may not be perfectly spherical but shall not be sha
29、rp to the touch. Length of incomplete thread. Former thread designation, for information only. 3 Designation EXAMPLE A tapping screw thread with thread size ST3,5 is designated as follows: Tapping screw thread IS0 1478 - ST33 NOTE The type of thread end should be specified within the product designa
30、tion, see product standards. 3 STDOBSI BS EN IS0 3478-ENGL 2000 = 3b24bb9 0838230 T59 9 BS EN IS0 14782000 BSI 389 Chiswick High Road London w4 4AIA BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standa
31、rds in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality o
32、f our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel 020 8996 9OOO. Fax: 020 8996 7400. BSI
33、 offers members an inividual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, intedonal and foreign standards publications should be addressed to Customer Services. Tel 020 8996 9001. Fax: 020 899
34、6 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international s
35、tandards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: O20 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up
36、 to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administrati on Tel 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyri
37、ght, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retried system or transmitted in any form or by any means - electronic, photocopying, recording or otherwis
38、e - without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. if permission is granted, the tem may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel 020 8996 7070.
