1、BS EN ISO 4759-3:2016T o l e r a n c e s f o r f a s t e n e r sPart 3: Washers for bolts, screws andnuts Product grades A, C and F (ISO4759-3:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 4759-3:2016 BRITISH STANDARDNational forewordThis British Sta
2、ndard is the UK implementation of EN ISO4759-3:2016. It supersedes BS EN ISO 4759-3:2000 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9, Fasteners.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. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 82558 3ICS 21.060.30Compliance with a British Standard cannot confer imm
4、unity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4759-3 June 2016 ICS 21
5、060.30 Supersedes EN ISO 4759-3:2000English Version Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A, C and F (ISO 4759-3:2016) Tolrances pour fixations - Partie 3: Rondelles pour vis et crous - Grades A, C et F (ISO 4759-3:2016) Toleranzen fr Verbindungselem
6、ente - Teil 3: Scheiben fr Schrauben und Muttern - Produktklassen A, C und F (ISO 4759-3:2016) This European Standard was approved by CEN on 19 May 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
7、tus of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, G
8、erman). 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa
9、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and U
10、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
11、EN ISO 4759-3:2016 EBS EN ISO 4759-3:2016EN ISO 4759-3:2016 (E) 3 European foreword This document (EN ISO 4759-3:2016) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. This European
12、 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. Attention is drawn to the possibility that some of the eleme
13、nts 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 4759-3:2000. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the follow
14、ing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
15、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4759-3:2016 has been approved by CEN as EN ISO 4759-3:2016 without any modification. BS EN ISO 4759-3:2016ISO 4759-3:2016(E)Foreword iv1 Scope . 12 Norma
16、tive references 13 Symbols 14 Tolerances . 2Annex A (informative) Tolerances . 8Bibliography .11 ISO 2016 All rights reserved iiiContents PageBS EN ISO 4759-3:2016ISO 4759-3:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
17、 (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 which a technical committee has been established has the right to be represented on that committee. International organizations,
18、governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further mai
19、ntenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). At
20、tention 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 responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduct
21、ion and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to confo
22、rmity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 2, Fasteners.This fourth edition cancels and replaces the thir
23、d edition (ISO 4759-3:2000), which has been technically revised.In comparison to ISO 4759-3:2000, the following changes have been made.a) the scope has been amended;b) the normative references have been updated;c) a new Clause 3 “Symbols and abbreviated terms” has been added;d) new product grade F h
24、as been included (F for Fine tolerances);e) tolerances for chamfers have been included;f) in Table A.1 tolerances for standard tolerance grades IT11 and IT14 have been included and IT16has been deleted;g) in Tables A.2 and A.3 limit deviations for tolerance classes h13 and H12 respectively have been
25、included;h) the bibliography has been updated;i) this part of ISO 4759 has been editorially revised.ISO 4759 consists of the following parts, under the general title Tolerances for fasteners: Part 1: Bolts, screws, studs and nuts Product grades A, B and C Part 3: Washers for bolts, screws and nuts P
26、roduct grades A, C and Fiv ISO 2016 All rights reservedBS EN ISO 4759-3:2016INTERNATIONAL STANDARD ISO 4759-3:2016(E)Tolerances for fasteners Part 3: Washers for bolts, screws and nuts Product grades A, C and F1 ScopeThis part of ISO 4759 specifies tolerances for flat washers of product grades A, C
27、and F with nominal diameters of 1 mm to 150 mm inclusive, designed to be used in bolted joints in combination with bolts, screws, studs and nuts.This part of ISO 4759 may be applied to non-flat washers however it does not include all the tolerances related to these washers.It applies to non-captive
28、and captive washers, and to standard and non-standard washers.It does not apply to dynamic disc springs.Washers of product grades F and A are intended to be used with bolts, screws, studs and nuts of product grades A and B; washers of product grade C are intended to be used with bolts, screws, studs
29、 and nuts of product grade C.NOTE The product grade refers to a specific tolerance range related to dimensional and geometrical characteristics (product grade F for fine tolerances, product grade A for precise tolerances, product grade C for large tolerances).Annex A presents tolerances taken from I
30、SO 286-1 and ISO 286-2.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen
31、t (including any amendments) applies.ISO 1101, Geometrical product specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-outISO 2692, Geometrical product specifications (GPS) Geometrical tolerancing Maximum material requirement (MMR), least material requireme
32、nt (LMR) and reciprocity requirement (RPR)3 Symbolsc1height of the internal chamfer, mmc2height of the external chamfer, mmd1clearance hole, mmd2outside diameter, mm ISO 2016 All rights reserved 1BS EN ISO 4759-3:2016ISO 4759-3:2016(E)e1radial difference between the clearance hole (area subject to s
33、hearing) and the end of the brittle fracture on the bearing side of the washere2radial difference between the outside diameter (area subject to shearing) and the end of the brittle fracture on the bearing side of the washerheffeffective height of the washer, mmt nominal thickness of the washer, mmte
34、ffeffective thickness of the washer, mmt1part of the clearance hole within the tolerance specified for d1t2part of the outside diameter within the tolerance specified for d2y coaxiality, mmz flatness (deflection), mm4 TolerancesThe tolerances for washers of product grades A, C and F are specified in
35、 Table 1.Unless otherwise specified, the tolerances specified in this part of ISO 4759 apply to washers prior to coating.Deviations from the tolerances specified in this part of ISO 4759 are permitted in product standards only for valid technical reasons. In cases where there is a difference between
36、 the tolerance requirements in this part of ISO 4759 and the product standard, the latter takes precedence.The tolerances of form and position are specified and indicated according to the definitions of ISO 1101 and ISO 2692.2 ISO 2016 All rights reservedBS EN ISO 4759-3:2016ISO 4759-3:2016(E)Table
37、1 Tolerances for washersDimensions in millimetresFeatureThickness tTolerancesProduct gradeF A C4.1 Clearance hole d1t1e1d1t1e1d1Xd1tol. min. max. tol. min. max. tol.t 2 H12 0,5 t 0,10 t H13 0,3 t 0,15 t H142 t 4 H12 0,3 t 0,15 t H13 0,25 t 0,20 t H14t 4 H13 0,2 t 0,20 t H14 0,2 t 0,25 t H15Detail X
38、for punched holed1ett11Rollover is undefined but allowed.Fracture (e1), t1, and rollover are undefined but allowed.Key1 rollover2 fracturet1is the part of the hole within the tolerance specified for d1.FeatureThickness tTolerancesProduct gradeF A C4.2 Outside diameter d2e2d2e2d2Yuni2300d2tol. max. t
39、ol. max. tol.t 2 h13 0,13 t h14 0,18 t h162 t 4 h13 0,15 t h14 0,20 t h16t 4 h14 0,18 t h15 0,25 t h16Detail Y for outside diameteruni2300d2tte22Rollover and t2are undefined but allowed.Fracture (e2), t2and rollover are undefined but allowed.Key1 rollover2 fracturet2is the part of the outside diamet
40、er within the tolerance specified for d2. ISO 2016 All rights reserved 3BS EN ISO 4759-3:2016ISO 4759-3:2016(E)Table 1 (continued) Dimensions in millimetresFeatureThickness tTolerancesProduct gradeF A C4.3 Thickness t 0,5 0,04 0,05 0,10t0,5 t 1 0,06 0,10 0,201 t 2,5 0,12 0,20 0,302,5 t 4 0,16 0,30 0
41、604 t 6 0,20 0,60 1,00Tolerance on thickness shall be measured after removal of burrs.6 t 10 0,24 1,00 1,2010 t 20 0,28 1,20 1,604 ISO 2016 All rights reservedBS EN ISO 4759-3:2016ISO 4759-3:2016(E)Table 1 (continued)Dimensions in millimetresFeatureThickness tTolerancesProduct gradeF A C4.4 Chamfer
42、s c1c2c1c2c1c2nom. min. min. min. min. min. min.1 t 2 0,20 t 0,25 t 0,20 t 0,25 t 0,20 t 0,25 t2 t 4 0,18 t 0,22 t 0,18 t 0,22 t 0,18 t 0,22 tt 4 0,15 t 0,20 t 0,15 t 0,20 t 0,15 t 0,20 t4.4.1 Outer chamfertc224.4.2 Inner chamferDimension t1in accordance with 4.1 shall be achieved irrespective to th
43、e height of the inner chamfer.c1tX1The chamfer dimensioning shall be considered as follows:12or1= 35 to 452= 35 to 45Key dimensioning1 angle2 dimension tolerance1234Key shape1 angle2 dimension + tolerance3 dimension - tolerance4 undefined shape ISO 2016 All rights reserved 5BS EN ISO 4759-3:2016ISO
44、4759-3:2016(E)Table 1 (continued) Dimensions in millimetresFeatureThickness tTolerancesProduct gradeF A C4.4.3 Supplementary optional requirements for captive washersWhen required by the purchaser, the position of the chamfer(s) relative to the deflection resulting from punch-ing process shall be sp
45、ecified at the time of the order.tc222c t2a) Outer chamfer opposite to concave side b) Outer chamfer opposite to convex sidetc11c11tc) Inner chamfer opposite to concave side d) Inner chamfer opposite to convex side6 ISO 2016 All rights reservedBS EN ISO 4759-3:2016ISO 4759-3:2016(E)Table 1 (continue
46、d) Dimensions in millimetresFeatureThickness tTolerancesProduct gradeF A C4.5 Tolerances of form and position4.5.1 Thickness variation t on the same partt tmax. max.xxtdd12t 0,5 0,020 0,0250,5 t 1 0,030 0,0501 t 2,5 0,060 0,100 No2,5 t 4 0,080 0,150 requirements4 t 6 0,100 0,200Requirements for t ap
47、ply at a distance of x = 0,1 (d2 d1) from the edge of the hole and outer edge, i.e. only the 60 % of the ring width.6 t 10 0,120 0,30010 t 20 0,140 0,4004.5.2 Coaxiality y y yAAdd21ymax. max. max.t 2 2IT11 2IT12 2IT132 t 4 2IT12 2IT13 2IT14t 4 2IT13 2IT14 2IT15Tolerance y is based on dimension d2(se
48、e Table A.1).4.5.3 Flatness (deflection) z z zzheffefftmax. max. max.t 0,5 0,07 0,10 0,130,5 t 1 0,10 0,15 0,201 t 2,5 0,20 0,20 0,25Flatness (deflection), z, is the difference between the effective height, heff, of the washer and the effective thickness, teff, of the material.NOTE 1 Tolerance z is
49、always independent of the tolerance on the thickness.NOTE 2 Additional processes (e.g. grinding or calibrating) may be required to minimize deflection.Tolerance on flatness shall be measured after removal of burrs. 2,5 t 4 0,30 0,30 0,304 t 6 0,40 0,40 0,406 t 10 0,60 0,60 0,6010 t 20 1,00 1,00 1,00 ISO 2016 All rights reserved 7BS EN ISO 4759-3:2016ISO 4759-3:2016(E)Annex A (informative) Tolera
