1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 4753:2011Fasteners Ends of parts withexternal ISO metric thread (ISO4753:2011)BS EN ISO 4753:2011 BRITISH STANDARDNational forewordThis British Standard is the UK imple
2、mentation of EN ISO 4753:2011.It supersedes BS EN ISO 4753:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9/2, Fasteners - Reference Standards.A list of organizations represented on this committee can beobtained on request to its secretary.Thi
3、s publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 70330 0ICS 21.040.10; 21.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publi
4、shed under the authority of theStandards Policy and Strategy Committee on 30 November 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4753 November 2011 ICS 21.060.01 Supersedes EN ISO 4753:1999English Version Fasteners - Ends of par
5、ts with external ISO metric thread (ISO 4753:2011) lments de fixation - Extrmits des lments filetage extrieur mtrique ISO (ISO 4753:2011) Mechanische Verbindungselemente - Enden von Teilen mit metrischem ISO-Auengewinde (ISO 4753:2011) This European Standard was approved by CEN on 31 October 2011. C
6、EN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on ap
7、plication to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
8、Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
9、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitati
10、on in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4753:2011: EBS EN ISO 4753:2011EN ISO 4753:2011 (E) 3 Foreword This document (EN ISO 4753:2011) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC
11、185 “Fasteners” the secretariat of which is held by DIN. 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 May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012.
12、Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 4753:1999. According to the CEN/CENELEC Internal Regul
13、ations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Mal
14、ta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 4753:2011 has been approved by CEN as a EN ISO 4753:2011 without any modification. BS EN ISO 4753:2011ISO 4753:2011(E) ISO 2011 All rights res
15、erved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for
16、which a technical 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. ISO collaborates closely with the International Electrotechnical Commission (IEC) on al
17、l matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are
18、circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held res
19、ponsible for identifying any or all such patent rights. ISO 4753 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 7, Reference standards. This third edition cancels and replaces the second edition (ISO 4753:1999), which has been technically revised. BS EN ISO 4753:2011BS EN I
20、SO 4753:2011INTERNATIONAL STANDARD ISO 4753:2011(E) ISO 2011 All rights reserved 1Fasteners Ends of parts with external ISO metric thread 1 Scope This International Standard specifies the form and dimensions of ends of parts with external ISO metric screw thread (e.g. bolt, screw and stud ends) reco
21、mmended for use. They apply to standardized or non-standardized threaded parts. For each end type, a symbol is specified and it is intended that these symbols be used when specifying one of the ends for threaded fasteners. 2 Normative references The following referenced documents are indispensable f
22、or the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions ISO 4027, Hexag
23、on socket set screws with cone point 3 Dimensions 3.1 General See Figures 1 and 2 and Tables 1 to 4. Symbols and descriptions of dimensions are specified in ISO 225. BS EN ISO 4753:2011ISO 4753:2011(E) 2 ISO 2011 All rights reserved3.2 Ends which are included in the nominal length of the fastener re
24、 1,4 d a) As-rolled end (RL) b) Chamfered end (CH) c) Rounded end (RN) d) Flat point (FL) e) Short dog point (SD) f) Long dog point (LD) g) Cone point (CN) h) Threaded cone point (CA) i) Truncated cone point (TC) Figure 1 BS EN ISO 4753:2011ISO 4753:2011(E) ISO 2011 All rights reserved 3dn d 1,6 P v
25、 0,5 d 0,5 mm lk 3 P ln 5 P ln lk 2 P j) Cup point (CP) k) Scrape point (SC) Key P pitch of the thread aEnd may be dimpled. bIncomplete thread u 2 P. cMaximum diameter at the minor thread diameter. dThe angle applies only to the portion of the point below the root diameter of the thread. eSlight rad
26、ius. f120 2 for short length screws; specified in product standard, e.g. ISO 4027. gThe end shall not be sharp to the touch. Figure 1 (continued) BS EN ISO 4753:2011ISO 4753:2011(E) 4 ISO 2011 All rights reservedTable 1 Dimensions Dimensions in millimetres Thread diameter dpdtcdzz1z2dah14bh16 h14 IT
27、140 dIT140 d1,6 0,8 0,8 0,40 0,80 1,8 0,9 0,9 0,45 0,902 1,0 1,0 0,50 1,00 2,2 1,2 1,1 0,55 1,102,5 1,5 1,2 0,63 1,25 3 2,0 1,4 0,75 1,503,5 2,2 1,7 0,88 1,75 4 2,5 2,0 1,00 2,004,5 3,0 2,2 1,12 2,25 5 3,5 2,5 1,25 2,506 4,0 1,5 3,0 1,50 3,00 7 5,0 2,0 4,0 1,75 3,508 5,5 2,0 5,0 2,00 4,00 10 7,0 2,5
28、 6,0 2,50 5,0012 8,5 3,0 8,0 3,00 6,00 14 10,0 4,0 8,5 3,50 7,0016 12,0 4,0 10,0 4,00 8,00 18 13,0 5,0 11,0 4,50 9,0020 15,0 5,0 14,0 5,00 10,00 22 17,0 6,0 15,0 5,50 11,0024 18,0 6,0 16,0 6,00 12,00 27 21,0 8,0 6,70 13,5030 23,0 8,0 7,50 15,00 33 26,0 10,0 8,20 16,5036 28,0 10,0 9,00 18,00 39 30,0
29、12,0 9,70 19,5042 32,0 12,0 10,50 21,00 45 35,0 14,0 11,20 22,5048 38,0 14,0 12,00 24,00 52 42,0 16,0 13,00 26,00aFor threads M1,6, dimensions and tolerances should be agreed as suitable. bFor nominal dimensions 1 mm, tolerance field h13 applies. cFor threads M5 no flat part on the cone is required;
30、 the point may be slightly rounded. dFor nominal dimensions 1 mm, tolerance field applies. IT130BS EN ISO 4753:2011ISO 4753:2011(E) ISO 2011 All rights reserved 53.3 Ends which are added to the specified nominal length of the fastener a) Pilot point, flat (PF) b) Pilot point with truncated cone (PC)
31、 aEnd may be dimpled. bIncomplete thread u 2 P. cThe angle applies only to the portion of the point below the root diameter of the thread. Figure 2 Table 2 Dimensions for flat pilot points Coarse thread Dimensions in millimetres Thread size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 dxamax. 2,9 3,8 4,5 6,1
32、 7,8 9,4 11,1 13,1 16,3 19,6 min. 2,7 3,6 4,3 5,9 7,6 9,1 10,8 12,8 15,9 19,2 z3IT1702,0 2,5 3,0 4,0 5,0 6,0 7,0 8,0 10,0 12,0 aIf, in special cases, a smaller diameter is required this shall be agreed separately. Table 3 Dimensions for pilot points with truncated cone Coarse thread Dimensions in mi
33、llimetres Thread size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 dxamax. 2,9 3,8 4,5 6,1 7,8 9,4 11,1 13,1 16,3 19,6 min. 2,7 3,6 4,3 5,9 7,6 9,1 10,8 12,8 15,9 19,2 z4IT1702,0 2,5 3,0 4,0 5,0 6,0 7,0 8,0 10,0 12,0 z5max. 1,00 1,50 2,00 2,50 3,00 3,50 4,00 4,50 5,00 6,00 min. 0,50 0,75 1,00 1,50 1,50 2,00
34、2,00 2,50 3,00 4,00 aIf, in special cases, a smaller diameter is required this shall be agreed separately. BS EN ISO 4753:2011ISO 4753:2011(E) 6 ISO 2011 All rights reservedTable 4 Dimensions for pilot points with truncated cone Fine pitch thread Dimensions in millimetres Thread size M8 1 M10 1 M12
35、1,5 M14 1,5 M16 1,5 dxmax. 6,30 8,00 9,60 11,40 13,50 min. 6,08 7,78 9,38 11,13 13,23z4IT1704 5 6 7 8 z5max. 2,5 3,0 3,5 4,0 4,5 min. 1,5 1,5 2,0 2,0 2,5 BS EN ISO 4753:2011This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparin
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