1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 21.040.10; 21.060.01 ISBN 0-626-14392-6 SANS 1700-3-7:2003 Edition 2 ISO 4753:1999 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Fasteners Part 3: Forms,
4、 dimensions and designations Section 7: Fasteners Ends of parts with external ISO metric thread This national standard is the identical implementation of ISO 4753:1999 and is adopted with the permission of the International Organization for Standardisation. Published by Standards South Africa 1 dr l
5、ategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 1700-3-7:2003 Edition 2 ISO 4753:1999 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard
6、was approved by National Committee STANSA TC 5120.01, Screw threads and fasteners, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS edition cancels and replaces the first SABS edition (SABS 1700-3-7:1996). AReference numberISO 47
7、53:1999(E)INTERNATIONALSTANDARDISO4753Second edition1999-12-01Fasteners Ends of parts with externalISO metric threadlments de fixation Extrmits des lments filetage extrieurmtrique ISOISO 4753:1999(E) ISO 1999All rights reserved. Unless otherwise specified, no part of this publication may be reproduc
8、ed or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 CH-1211 Genve 20 SwitzerlandInternet isoiso.chPrinted in SwitzerlandiiForewordISO
9、(the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical commit
10、tee has been established hasthe right to be represented on that committee. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnic
11、al 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 approval by a
12、t least 75 % of the member bodies casting a vote.International Standard ISO 4753 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 7,Reference Standards for fasteners (mainly covering terminology, dimensioning, sizes and tolerancing).This second edition cancels and replaces th
13、e first edition (ISO 4753:1983) which has been technically revised.INTERNATIONAL STANDARD ISO ISO 4753:1999(E)1Fasteners Ends of parts with external ISO metric thread1 ScopeThis International Standard specifies the form and dimensions of ends of parts with external ISO metric screwthread (e.g., bolt
14、 and screw ends) recommended for use. They apply to standardized or non-standardized threadedparts if they are specified at the time of order.For each end type a symbol is specified and it is recommended to use these symbols when specifying one of theends for threaded fasteners.2 Normative reference
15、sThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis International Standard. For dated references, subsequent amendments to, or revisions of, any of thesepublications do not apply. However, parties to agreements based on this Inter
16、national Standard are encouraged toinvestigate the possibility of applying the most recent editions of the normative documents indicated below. Forundated references, the latest edition of the normative document referred to applies. Members of ISO and IECmaintain registers of currently valid Interna
17、tional Standards.ISO 225:1983, Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensions.ISO 4027:1993, Hexagon socket set screws with cone point.3 DimensionsSee Figures 1 and 2 and Tables 1 to 4.Symbols and designations of dimensions are specified in ISO 225.ISO 4753:1999(E)ISO
18、23.1 Ends which are included in the nominal length of the fastenerAs-rolled end (RL) Chamfered end (CH) Rounded end (RN)Flat point (FL) Short dog point (SD) Long dog point (LD)Cone point (CN) Truncated cone point (TC) Cup point (CP)Scrape point (SC)re 1,4ddn= d 2 1,6Pv = 0,5d 0,5 mmlk2P (P is the pi
19、tch of thread)NOTE 1 l is the nominal length of the fastener.NOTE 2 Incomplete thread u 2 PNOTE 3 The 45 angle for the ends FL, SD, LD and CP applies only to the portion of the point below the root diameter of thethread.aEnd may be dimpled.bMaximum diameter at the minor thread diameter.cSlight radiu
20、sd120 2 for short length screws; see product standard, e.g. ISO 4027.Figure 1 ISOISO 4753:1999(E)3Table 1 DimensionsDimensions in millimetresThread diameter dpdtcdzz1z2dah14 bh16 h14014+ITd014+ITd1,6 0,8 0,8 0,4 0,81,8 0,9 0,9 0,45 0,92 1 1 0,5 12,2 1,2 1,1 0,55 1,12,5 1,5 1,2 0,63 1,253 2 1,4 0,75
21、1,53,5 2,2 1,7 0,88 1,754 2,5 2 1 24,5 3 2,2 1,12 2,255 3,5 2,5 1,25 2,56 4 1,5 3 1,5 37 5 2 4 1,75 3,58 5,5 2 5 2 410 7 2,5 6 2,5 512 8,5 3 8 3 614 10 4 8,5 3,5 716 12 4 10 4 818 13 5 11 4,5 920 15 5 14 5 1022 17 6 15 5,5 1124 18 6 16 6 1227 21 8 6,7 13,530 23 8 7,5 1533 26 10 8,2 16,536 28 10 9 18
22、39 30 12 9,7 19,542 32 12 10,5 2145 35 14 11,2 22,548 38 14 12 2452 42 16 13 26aFor sizes , M1,6 dimensions and tolerances should be agreed as suitable.b For nominal dimensions 1 mm tolerance field h13 applies.c For threads M5 no flat part on the cone required; the point may be slightly rounded.d Fo
23、r nominal dimensions 1 mm tolerance field 013+ITapplies.ISO 4753:1999(E)ISO43.2 Ends which are added to the specified nominal length of the fastenerPilot point, flat (PF) Pilot point with truncated cone (PC)NOTE 1 Incomplete thread u 2PNOTE 2 The 20 angle applies only to the portion of the point bel
24、ow the root diameter of the thread.aEnd may be dimpled.Figure 2Table 2 Dimensions for flat pilot points; coarse pitch threadDimensions in millimetresThread size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24dxamax. 2,9 3,8 4,5 6,1 7,8 9,4 11,1 13,1 16,3 19,6min. 2,7 3,6 4,3 5,9 7,6 9,1 10,8 12,8 15,9 19,2z3017
25、+IT22,53456781012aIf, in special cases, a smaller diameter is required this must be agreed separately.Table 3 Dimensions for pilot points with truncated cone; coarse pitch threadDimensions in millimetresThread size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24dxamax. 2,9 3,8 4,5 6,1 7,8 9,4 11,1 13,1 16,3 19,
26、6min. 2,7 3,6 4,3 5,9 7,6 9,1 10,8 12,8 15,9 19,2z4 017+IT22,5 3 4 5 6 7 81012z5max. 1,0 1,50 2 2,5 3,0 3,5 4 4,5 5 6min. 0,5 0,75 1 1,5 1,5 2,0 2 2,5 3 4aIf in special cases a smaller diameter is required this must be agreed separately. ISOISO 4753:1999(E)5Table 4 Dimensions for pilot points with truncated cone; fine pitch threadDimensions in millimetresThread size M8 1 M10 1 M12 1,5 M14 1,5 M16 1,5dxmax. 6,3 8,0 9,6 11,40 13,50min. 6,08 7,78 9,38 11,13 13,23z4 017+IT456 7 8z5max. 2,5 3 3,5 4 4,5min. 1,5 1,5 2 2 2,5
