1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 1478:2000 The E
2、uropean Standard EN ISO 1478:1999 has the status of a British Standard ICS 21.040.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Tapping screw threadThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the
3、 authority of the Standards Committee and comes into effect on 15 January 2000 BSI 01-2000 ISBN 0 580 35009 6 BS EN ISO 1478:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the English language version of EN ISO 1478:1999. It is identical wi
4、th ISO 1478:1999. It supersedes BS EN ISO 1478:1995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee FME/9, Bolts, nuts and accessories, to Subcommittee FME/9/2, Slotted and recessed head screws, which has the responsibility to: aid enquirers to unders
5、tand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on t
6、his Subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards
7、which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard doe
8、s 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 obligations. Summary of pages This document comprises a front cover, an insi
9、de front cover, the EN ISO title page, the EN ISO foreward page, the ISO title page, page ii, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EN ISO 1478:1999A Referencenumbe r ISO1478:1999 (E) INTERNATIONAL STANDARD ISO
10、1478 Secondedition 19990801 Tappingscrewsthread Filetagedevistle EN ISO 1478:1999)E(9991:8741OSI ii Foreword ISO (the InternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOte
11、chnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Co
12、mmission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtoth ememberbodiesforvoting. PublicationasanInternationalStandardrequiresappro
13、valbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO1478waspreparedbyTechnicalCommitteeISO/TC2, Fasteners. Thissecondeditioncancelsandreplacesthefirstedition(ISO1478:1983)whichhasbeentechnicallyrevised. EN ISO 1478:1999DRADNATSLANOITANRETNI OSI )E(9991:8741OSI 1 Tappingscrewsthread
14、 1Scope ThisInternationalStandardspecifiesthethreadandthreadendsfortappingscrews(sheetmetalscrews)with threadsizesfromST1,5toST9,5inclusive. 2Dimensions SeeFigures1and2andTable1. a Slightradius Figure1Threaddimensions EN ISO 1478:1999)E(9991:8741OSI OSI 2 a Noextrusionofexcessmetalbeyondtheapexofthe
15、typeCconeendresultingfromthreadrollingshallbepermissible. Aslightroundingortruncationofthepointisdesirable. Figure2Threadends EN ISO 1478:1999OSI )E(9991:8741OSI 3 Table1Dimensions Dimensionsinmillimetres Threadsize ST 1,5 ST 1,9 ST 2,2 ST 2,6 ST 2,9 ST 3,3 ST 3,5 ST 3,9 ST 4,2 ST 4,8 ST 5,5 ST 6,3
16、ST 8 ST 9,5 P 0,5 0,6 0,8 0,9 1,1 1,3 1,3 1,3 1,4 1,6 1,8 1,8 2,1 2,1 d 1 max. 1,52 1,90 2,24 2,57 2,90 3,30 3,53 3,91 4,22 4,80 5,46 6,25 8,00 9,65 min. 1,38 1,76 2,10 2,43 2,76 3,12 3,35 3,73 4,04 4,62 5,28 6,03 7,78 9,43 d 2 max. 0,91 1,24 1,63 1,90 2,18 2,39 2,64 2,92 3,10 3,58 4,17 4,88 6,20 7,
17、85 min. 0,84 1,17 1,52 1,80 2,08 2,29 2,51 2,77 2,95 3,43 3,99 4,70 5,99 7,59 d 3 max. 0,79 1,12 1,47 1,73 2,01 2,21 2,41 2,67 2,84 3,30 3,86 4,55 5,84 7,44 min. 0,69 1,02 1,37 1,60 1,88 2,08 2,26 2,51 2,69 3,12 3,68 4,34 5,64 7,24 c max. 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,15 0,15 0,15 0,15 0,15
18、r a 0 , 5 0 , 6 0 , 6 0 , 7 0 , 8 0 , 91 , 1 1 , 4 yref. b TypeC 1,4 1,6 2 2,3 2,6 3 3,2 3,5 3,7 4,3 5 6 7,5 8 TypeF 1,1 1,2 1,6 1,8 2,1 2,5 2,5 2,7 2,8 3,2 3,6 3,6 4,2 4,2 TypeR 2 , 733 , 2 3 , 6 4 , 3 5 6 , 3 Number c 0123456781 01 21 41 62 0 a Dimensionr isareferenceandhasbeenprovidedforguidanceo
19、nly.Theendmaynotbeperfectlysphericalbutshall notbesharptothetouch. b Lengthofincompletethread. c Formerthreaddesignation,forinformationonly. 3Designation EXAMPLEAtappingscrewthreadwiththreadsizeST3,5isdesignatedasfollows: TappingscrewthreadISO1478ST3,5 NOTE Thetypeofthreadendshouldbespecifiedwithint
20、heproductdesignation,seeproductstandards. EN ISO 1478:1999BS EN ISO 1478:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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