1、BRITISH STANDARD BS EN 14218:2003 Hexagon nuts with flange Fine pitch thread The European Standard EN 14218:2003 has the status of a British Standard ICS 21.060.20 BS EN 14218:2003 This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 29 August 20
2、03 BSI 29 August 2003 ISBN 0 580 42543 6 National foreword This British Standard is the official English language version of EN 14218:2003. The UK participation in its preparation was entrusted to Technical Committee FME/9, Bolts, nuts and accessories, which has the responsibility to: A list of orga
3、nizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Corres
4、pondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. WARNING The United Kingdom, as a member of CE
5、N, is obliged to publish EN 14218:2003 as a British Standard. However, attention is drawn to the fact that during the development of the European Standard the United Kingdom consistently voted against its approval as a European Standard. The UK believes that the corresponding International Standard,
6、 ISO 10663:1999, should have been implemented, without modification, as a European Standard. As far as the UK is concerned, it is dangerous and unacceptable to have a European Standard that differs from the corresponding International Standard by the across flats dimension for one size of fastener,
7、all other requirements being identical between the two standards concerned. As part of BSIs duty of care, we draw the attention of users of this standard to our concerns that M10 nuts conforming to EN 14218 differ from similar fasteners conforming to ISO 10663 in the across flats dimension only. Thi
8、s is 16 mm in EN 14218 and 15 mm in ISO 10663. BSI will assume no liability whatsoever for the failure on the part of any user of this standard not to consider this aspect. Precautions are urged to ensure that commingling of those M10 nuts which conform to EN 14218 and those M10 nuts which conform t
9、o ISO 10663 is avoided. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK intere
10、sts informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this docum
11、ent indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14218 April 2003 ICS 21.060.20 English version Hexagon nuts with flange Fine pitch thread (ISO 10663:1999, modified) Ecrous hexagonaux emba
12、se cylindro-trononique Filetage pas fin (ISO 10663:1999, modifie) Sechskantmuttern mit Flansch Feingewinde (ISO 10663:1999, modifiziert) This European Standard was approved by CEN on 14 February 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
13、tions 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 application to the Management Centre or to any CEN member. This European Standard exists in three of
14、ficial 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria,
15、Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE F
16、R NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14218:2003 EEN 14218:2003 (E) 2 Foreword This document (EN 14218:2003) has been prepared by Technical Committee C
17、EN/TC 185 “Threaded and non- threaded mechanical fasteners 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 October 2003, and conflicting
18、national standards shall be withdrawn at the latest by October 2003. Annex A is normative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun- tries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Fi
19、nland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 10663:1999 was approved by CEN as a European Standard with ag
20、reed common modifications as given below. Nuts in accordance with this European Standard correspond to those specified in the International Standard ISO 10663:1999 with the exception that the width across flats for M10 is 16 mm (instead of 15 mm) and that the prop- erty class 9 was deleted. Moreover
21、, the option for surface coatings according to EN ISO 10683 was added. EN 14218:2003 (E) 3 1 Scope This European Standard specifies the characteristics of hexagon nuts with flange, with metric fine pitch thread, with nominal thread diameters from 8 mm up to and including 20 mm, in product grade A fo
22、r d 16 mm and product grade B for d 16 mm and with property classes 8, 10, 12 and A2-70. If, in special cases, specifications other than those listed in this European Standard are required, they should be selected from existing European and International Standards, for example ISO 724, EN ISO 898-6,
23、 ISO 965-2, EN ISO 3506-2. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequ
24、ent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 493, Fasteners Surface discontinuities Nuts.
25、EN 20225, Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensions (ISO 225:1983). EN ISO 898-6, Mechanical properties of fasteners Part 6: Nuts with specified proof load values Fine pitch thread (ISO 898-6:1994). EN ISO 3269, Fasteners Acceptance inspection (ISO 3269:2000). EN
26、 ISO 3506-2, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 2: Nuts (ISO 3506-2:1997). EN ISO 4042, Fasteners Electroplated coatings (ISO 4042:1999). EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C (ISO 4759-1:2000)
27、. EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings (ISO 10683:2000). ISO 724, ISO general purpose metric screw threads Basic dimensions. ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw thre
28、ads Medium quality. ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts. EN 14218:2003 (E) 4 3 Dimensions See Figure 1 and Table 1. Symbols and designations of dimensions are specified in EN 20225. Key am Wis the wrenching height; see note to Table 1. b = 90 to 120 c = 15 to 3
29、0 d = 15 to 25 ec is measured at d wmin. fEdge contour optional Figure 1 EN 14218:2003 (E) 5 Table 1 - Dimensions Dimensions in millimetres Thread d x P aM8 1 M10 1,25 M10 1 M12 1,25 M12 1,5 (M14 1,5) bM16 1,5 M20 1,5 c min. 1,2 1,5 1,8 2,1 2,4 3 min. 8,00 10,00 12 14,0 16,0 20,0 d amax. 8,75 10,80
30、13 15,1 17,3 21,6 d cmax. 17,9 21,8 26,0 29,9 34,5 42,8 d wmin. 15,8 19,6 23,8 27,6 31,9 39,9 e min. 14,38 17,77 20,03 23,36 26,75 32,95 max. 8,00 10,00 12,00 14,0 16,0 20,0 m min. 7,64 9,64 11,57 13,3 15,3 18,7 m wmin. 4,6 5,6 6,8 7,7 8,9 10,7 max. 13,00 16,00 18,00 21,00 24,00 30,00 s min. 12,73 1
31、5,73 17,73 20,67 23,67 29,16 r cmax. 0,5 0,6 0,7 0,9 1 1,2 NOTE If the product passes the gauging given in annex A, the requirements for dimensions e, c and m ware satisfied. aP is the pitch of the thread. bThe size in brackets should be avoided if possible. cRadius r applies both at the corners and
32、 at the flats of the hexagon. EN 14218:2003 (E) 6 4 Specifications and reference European or International Standards See Table 2. Table 2 Specifications and reference European or International Standards Material Steel Stainless steel General requirements International Standard ISO 8992 Tolerance 6H
33、Thread International Standards ISO 724, ISO 965-2 Property class 8 10 12 Style decisive for mechanical properties ad 16 mm style 2 d 16 mm style 1 style 2 d 16 mm bstyle 2 A2-70 Mechanical properties European Standards EN ISO 898-6 EN ISO 3506-2 Product grade d 16 mm: A d 16 mm: B Tolerances Europea
34、n Standard EN ISO 4759-1 Finish As processed Requirements for electroplating are covered in EN ISO 4042. Requirements for non-electrolytically applied zinc flake coatings are covered in EN ISO 10683. Plain Surface discontinuities Limits for surface discontinuities are covered in EN 493. Acceptabilit
35、y For acceptance procedure, see EN ISO 3269. aBased on the nut height (dimension m min) nuts to this standard are of style 2. However, since for style 2, EN ISO 898-6 does not specifiy mechanical properties for all property classes and sizes as specified in this standard, in some cases nuts have to
36、be tested according to style 1. bFor d 16 mm property class 12 is not specified. 5 Designation EXAMPLE A hexagon nut with flange, with thread M12 x 1,25 and property class 10 is designated as follows: Hexagon nut with flange EN 14218 M12 x 1,25 10 EN 14218:2003 (E) 7 Annex A (normative) Gauging of h
37、exagon flange nuts A.1 Recommended method for gauging of hexagon (see Figure A.1 and Table A.1) The nut shall be gauged using two plain ring gauges, A and B, to demonstrate the coincidental acceptability of hexagon height, corner fill and width across corners. Gauge A shall be placed over the nut an
38、d shall be seated on the flange. Gauge B shall be placed on the top of the nut normal to the nut axis. The two gauges shall not be in contact. A.2 Recommended method for gauging of flange thickness (see Figure A.1 and Table A.1) Gauge C is a flat feeler or ring gauge. It is used to prove that the fl
39、ange thickness at the junction with the hexagon portion is equal to or greater than specified values. The acceptance criterion is that gauge C shall fit under gauge A without contact when the nut is seated on a flat plate. Key 1 Gauge A 2 Gauge B 3 Gauge C NOTE W a min = e theoretical W b max = e mi
40、n 0,01 mm T a max = m w min Figure A.1 EN 14218:2003 (E) 8 Table A.1 Dimensions in millimetres Gauge A Gauge B Gauge C W aT aW bT bW cT cNominal thread diameter d max. min. max. min. max. min. min. min. max. min. 8 10 12 15,02 18,49 20,79 15,01 18,48 20,78 4,60 5,60 6,80 4,59 5,59 6,79 14,37 17,76 2
41、0,02 14,36 17,75 20,01 4 5 5 20 24 29 1,31 1,81 2,20 1,30 1,80 2,19 14 16 20 24,26 27,72 34,65 24,25 27,71 34,64 7,70 8,90 10,70 7,69 8,89 10,69 23,35 26,74 32,94 23,34 26,73 32,93 6 6 6 32,5 37 45 2,55 2,96 3,70 2,54 2,95 3,69 blankBS EN 14218:2003 BSI 389 Chiswick High Road London W4 4AL BSI Briti
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