1、STDmBSI BS EN IS0 4759-L-ENGL 2001 M Lb24bb9 0889389 O BRITISH STANDARD Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C The European Standard EN IS0 4759-1:2ooO has the status of a British Standard ICs 21.060.10: 21.060.20 SFEN IS0 L759-1:2001 NO COPYING
2、WITHOUT BSI PERMISSION EXCEPT As PERMITTED BY COPYRIGl LAW STD-BSI BS EN IS0 4759-1-ENGL 2OOL H Lb24bb9 OB89190 837 = BS EN IS0 4759-1:2001 direction of the Engineering Amd. No. Date , Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 February
3、 2001 National foreword Comments This British Standard is the official English language version of EN IS0 4759-1:2000. It is identical with Is0 47541:2000. It supersedes BS 6322-1: 1982 which is withdrawn. The TJK participation in its preparation was entrusted by Technical Committee FME/s, Bolts, nu
4、ts and accessories (+QA and hose clamps), to Subcommittee FME/9/3, Reference standards for fasteners (+tolerance standards), which has the responsibility to: - aid enquirem to understand the text; - present to the responsible intemationaVEuropean committee any enquiries on the intepretation, or prop
5、osals 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 this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN
6、 and CENELEC standards normally include an annex which lists normative references to internationai publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the sec
7、tion entitled “International Standards Correspondence Index”, or by using the “Find” facility 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
8、. Compliance with a British Standard does not of itself confer immunity from legal obligations. Q BSI 022001 ISBN O 580 36778 9 - STD.BSI BS EN IS0 4759-II-ENGL SOOL 1624669 0889191 773 m EUROPEAN STANDARD EN IS0 47594 NORME EUROPENNE EUROPISCHE NORM November 2000 ICs 02.006.1 O English version Tole
9、rances for fasteners - Part 1 : Bolts, screws, studs and nuts - Product grades A, B and C (IS0 4759-1 :2000) Tolrances des lments de fixation - Partie 1 : Vis, goujons et crous - Grades A, B et C (IS0 4759-1:2000) Toleranzen fr Verbindungselemente - Teil 1 : Schrauben und Muttem - Produktklassen A,
10、B und C (IS0 4759- 1 :2000) This European Standard was approved by CEN on 7 October 2000. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lis
11、ts and bibliographical references concerning such national standards may be obtained on application to the 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 respons
12、ibility of a CEN member into its own language and notified to the Management Centre 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, Netherl
13、ands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMITE EUROPEEN DE NORMALISATION Management Centre: rue de Stassart, 36 51050 Brussels O 2000 CEN All rights of exploitation in any fom and by any means reserv
14、ed worldwide for CEN national Members. Ref. No. EN IS0 4759-1:2000 E Foreword The text of the International Standard IS0 4759-1 :2000 has been prepared by Technical Committee ISOTTC 2 “ Fasteners“ in collaboration with Technical Committee CEN/TC 185 II Threaded and non-threaded mechanical fasteners
15、and accessories“, 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 2001, and conflicting national standards shall be withdrawn at the latest by May 2001
16、. 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, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Po
17、rtugal, 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 appropriate, the normative annex ZA for the references to international publications with the
18、ir relevant European publications will be circulated with the German version. Endorsement notice The text of the International Standard IS0 4759-1:2000 was approved by CEN as a European Standard without any modification. STD-BSI BS EN IS0 4759-1-ENGL 2001 m 1b24bb9 0889193 54b EN IS0 4759-12000 INTE
19、RNATIONAL STANDARD IS0 47594 Second edition 2000-1 1-1 5 Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C Tolrances des dments de fixation - Partie 1: Vis, goujons et crous - Grades A, B et C Reference number IS0 4759-1 :2000(E) STD.BSI ES EN IS0 4759-1-EN
20、GL 2001 m 1624669 0889194 482 EN IS0 4769-1:2000 Contents Page Foreword . iv 1 scope 1 2 Normative references 2 3 Tolerances for metric bolts, screws and studs 3 4 Tolerances for metric nuts 25 5 Tolerances for tapping screws . 36 Annex A (informative) Tolerances . 44 Annex B (informative) Examples
21、of dimensioned and toleranced fasteners 46 Annex C (informative) Examples of gauges and other measuring devices 49 iii - STD.BSI BS EN IS0 4757-1-ENGL 2001 1b24bb9 0889195 319 EN IS0 4769-1:2000 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national s
22、tandards 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 committee has been established has the right to be represented on that committee. International
23、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 electrotechnical standardization. International Standards are drafted in accordance with the rules gi
24、ven 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 at least 75 % of the member bodies casting a vote. Attention is drawn to the possibil
25、ity that some of the elements of this part of IS0 4759 may be the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. International Standard IS0 4759-1 was prepared by Technical Committee ISOlTC 2, Fasteners, Subcommittee SC 7, Reference standar
26、ds for fasteners (mainly covering terminology, dimensioning, sizes and tolerancing). This second edition cancels and replaces the first edition (IS0 4759-1 :1978), which has been technically revised. IS0 4759 consists of the following parts, under the general title Tolerances for fasteners: - Part 7
27、: Bolts, screws, studs and nuts - Product grades A, B and C - Part 3: Plain washers for bolts, screws ans nuts - Product grades A and C Annexes A to C of this part of IS0 4759 are for information only. iv STD.BSI ES EN IS0 4759-1-ENGL 2001 1624669 0889396 255 EN IS0 4759-1:2000 Tolerances for fasten
28、ers - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C 1 Scope This part of IS0 4759 specifies a selection of tolerances for bolts, screws, studs and nuts with IS0 metric threads and with product grades A, B and C and for tapping screws with product grade A. NOTE precise. The produc
29、t grades refer to the size of the tolerances where grade A is the most precise and grade C is the least The tolerances, except tolerances for threads, are selected from the system of limits and fits specified in IS0 286-1 and IS0 286-2. The tolerances for metric threads are taken from the series of
30、tolerance classes specified in IS0 965-3. The tolerances for tapping screw threads are covered in IS0 1478. The tolerances of form and position are specified and indicated in accordance with IS0 1101, IS0 8015 and IS0 2692. The tolerances specified in this pari of IS0 4759 apply to fasteners prior t
31、o coating unless otherwise specified. See also IS0 4042. Deviations from the tolerances specified in this part of IS0 4759 are only permitted in product standards where there are valid technical reasons. In cases where there is a difference between the tolerance requirements in this part of IS0 4759
32、 and the product standard, the product standard takes precedence. It is recommended that these tolerances also be used for non-standard fasteners. Dimensions and tolerances given in this part of IS0 4759 are in millimetres. 1 STD-BSI BS EN IS0 4759-1-ENGL 2001 1624669 0889397 191 m EN IS0 4759-1:200
33、0 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IS0 4759. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements
34、 based on this part of IS0 4759 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of curren
35、tly valid International Standards. IS0 2251 983, fasteners - Bolts, screws, studs and nuts - Symbols and designation of dimensions. IS0 286-1 :1988, IS0 system of limits and fits - Part 1: Bases of tolerances, deviations and fits. IS0 286-2:l 988, IS0 system of limits and fits - Part 2: Tables of st
36、andard tolerance grades and limit deviations for holes and shafts. IS0 885:2000, General purpose bolts and screws - Metric series - Radii under the head. IS0 965-3:1998, IS0 general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional screw threads. IS0 1 1 O1 :2000, Geo
37、metrical Product Specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, location and run-out. IS0 1478:1999, Tapping screws thread. IS0 1479:1983, Hexagon head tapping screws, IS0 2692: 1 988, Technical drawings - Geometrical tolerancing - Maximum material principle. IS0 4
38、032:1999, Hexagon nuts, style 1 - Product grades A and B. IS0 4042:1999, Fasteners - Electroplated coatings. IS0 4757:l 983, Cross recesses for screws. IS0 7053:1992, Hexagon washer head tapping screws. IS0 7721 :1983, Countersunk head screws - Head configuration and gauging. IS0 801 5:1985, Technic
39、al drawings - Fundamental tolerancing principle. IS0 10509: 1992, Hexagon flange head tapping screws. IS0 10642:1997, Hexagon socket countersunk head screws. IS0 10664:1999, Hexalobular infernal driving feature for bolts and screws, 2 STD-BSI BS EN IS0 4759-II-ENGL 2001 D Lb24bb9 0887198 O28 EN IS0
40、4759-1:ZOOO I close close 3 Tolerances for metric bolts, screws and studs 3.1 Dimensional tolerances Symbols and designations of dimensions are specified in IS0 225. Feat u re 3.1.1 Tolerance level Shankandbearing surface Other features 3.1.2 External thread 3.1.3 Driving features 3.1.3.1 External 3
41、.1.3.1.1 Width across flats Figure 1 Figure 2 Tolerance for product grades Notes S 30 Tolerance hl 3 h14 close wide wide wide For certain Iroducts and (but 6g for property class 8.8 and higher) S 6 18 18 180 Tolerance hl 4 hl 5 hl 6 hl 7 :oatings, other olerance classes or threads may )e specified i
42、n the elevant product ind coating itandards. 3 STD.BS1 BS EN IS0 4759-1-ENGL 2001 lbS4bb9 0889199 Tb4 EN IS0 4759-1:2000 Feature I I 3.1.3.1.2 Width across corners I Figure 3 Figure 4 3.1.3.1.3 Height of head I I Figure 5 Tolerance for product grades AlBl C I I emin = 1,13 smin emin = 1,12 for bolts
43、 and screws with flange and other cold forged heads without trimming operation js14 jsl5 Tolerance jsl6 jsl7 L Notes 4 Feature The formulae for kw min only apply to the products illustrated. a The symbol k, replaces the previously used k see annex A of tht product standards For gauging, Ikl Figure 6
44、 .1.3.1.4 Wrenching height ._ Figure 7 Figure 8 Tolerance for product grades Notes A lelc )r hexagon bolts and screws with flange, k is ?fined only as a maximum kw defines the length over which excluding any chamfer, washer face or radius specified in the appropriate product standard. emin applies b
45、ut EN IS0 4759-12000 tanSma b dw min -emin is the greater of cmin x 1,25 or Cmin + 0,4 is the flange angle )mensions kwa, k, d, e and Gare in accordance rith IS0 225. Figure 8 a) EN IS0 4769-1:ZOOO Tolerance for product grades Feature Notes A C B 3.1.3.2 Internal 3.1.3.2.1 Hexagon sockets S Toleranc
46、 E F8 j59 K9 135 2 2,5 3 D11 (SI Figure 9 4 El 1 5 6 8 10 12 14 E12 14 D12 3.1.3.2.2 Slots olerance field i13 for n 6 1 Tole rana + 0,20 + 0,O n 61 + 0,31 + 0,06 :14forn 1 + 0,37 + 0,07 Figure 10 6 sTD.BSI BS EN IS0 4759-1-ENGL 2OOL Lb24bb9 0889202 389 EN IS0 4759-1:2000 I Feat u re I 3.1.3.2.3 Dept
47、h of hexagon sockets and slots -. . .-. 3.1.3.2.4 Cross recesses 3.1.3.2.5 Hexalobular recesses 3.1.4 Other features 3.1.4.1 Head diameter I Figure 12 Figure 13 I Tolerance for product grades A The depth of hexagon iockets and slots is ipecified in product ;tandards only as a ninimum. It is sstricte
48、d by the ninimum wall hickness W. B C See IS0 4757 for all dimensions except pen- etration depths. For penetration depths see appropriate product standard. See IS0 10664 for all dimensions except pen- etration depths. For penetration depths see appropriate product standard. hl 3a hl 4 Notes or the t
49、ime being enerally pplicable ilerances cannot le specified. k IT1 3 for knurled heads Combined contro of diameter and height for countei sunk head screw in accordance with IS0 7721 or IS0 10642. 7 STD.BSI BS EN IS0 4757-1-ENGL 2001 Lb24669 0889203 215 EN IS0 4759-1:2000 d, min = smin - IT16 for width across flats c 21 mm d, min = 0,95 smin for width across flats 3 21 mm Tolerance for product grades Feature Notes C A B 3.1.4.2 Head height except for hexagon heads) s M5: h13 M5: h14 Figure 14 f. . lP :or countersunk head screws k is definied in Iro
