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 21.060.10 ISBN 0-626-15623-8 SANS 1700-3-3:1996 Edition 1 and nat. amdt 1 ISO 273:1979 Edition 1 Any reference to SABS 1700-3-3 is deemed to be a ref
4、erence to this standard (Government Notice No. 1373 of 8 November 2002) SOUTH AFRICAN NATIONAL STANDARD Fasteners Part 3: Forms, dimensions and designations Section 3: Clearance holes for bolts and screws This national standard is the identical implementation of ISO 273:1979 and is adopted with the
5、permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan 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 SANS 1700-3-3:1996 Edition 1 and
6、nat. amdt 1 ISO 273:1979 Edition 1 Table of changes Change No. Date Scope Nat. amdt 1 2004 Amended to change the designation of SABS standards to SANS standards with no technical changes. Abstract Specifies clearance hole diameters for general purpose applications. Keywords clearance distances, clea
7、rances, designations, dimensions, fasteners, hole-size measurement, holes, patterns (product engineering), screws (bolts), specifications. National foreword This South African standard was approved by National Committee StanSA TC 5120.01, Screw threads and fasteners, in accordance with procedures of
8、 Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This edition is technically identical to SABS 1700-3-3:1996. International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATlONWlE)I(C1YHAPOflHAR OPTAHM3AUMR n0 CTAH,QAPTbl3ALWlRGANlSATlON INTERNATIONALE DE NORMALISATIO
9、N Fasteners - Clearance holes for bolts and screws ;y $.; , ,; / , I / / V - -a=;- t , / , f / / / , / / . x, , I , , I , , JQ+ ,:T /IdA / / A -.- a t t I_- Dimensions in millimetres - - - - I Clearance hole d, I I Thread diameter d 42 45 48 52 56 60 64 68 72 76 80 85 90 95 100 105 110 115 120 125 1
10、30 140 150 Clearance hole dh Series : I fine medium coarse 43 45 48 46 48 52 50 52 56 - 54 56 62 58 62 66 62 66 70 66 70 74 70 74 78 74 78 82 78 82 86 82 86 91 87 91 96 93 96 101 98 101 107 104 107 112 109 112 117 114 117 122 119 122 127 124 127 132 129 132 137 134 137 144 144 147 155 155 158 165 Th
11、e following tolerance fields are given for information only, for use where it is desirable to specify tolerances : fine series : HI2 medium series : H13 coarse series : H14 In cases where it is necessary to avoid interference between the edge of the hole and the underhead fillet of the bolt, a chamfer is recommanded. 2
