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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1663:1998 The Europ
2、ean Standard EN 1663:1997 has the status of a British Standard ICS 21.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Prevailing torque type hexagon nuts with flange (with non-metallic insert) (ISO 7043:1997, modified) This British Standard, having been prepared under t
3、he direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1998 BSI 1998 ISBN 0 580 29328 9 BS EN 1663:1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the Engli
4、sh language version of EN 1663:1997. The UK participation in its preparation was entrusted by Technical Committee FME/9, Bolts, nuts and accessories, to Subcommittee FME/9/10, Male and female prevailing torque fasteners, which has the responsibility to: aid enquirers to understand the text; present
5、to the responsible European committee any enquiries on the interpretation, or proposals 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 r
6、equest 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 Standards Catalogue under the section entitled International Standards Correspondence Index, or using the Find facility of the B
7、SI 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. WARNING The United Kingdom as a member of CEN is obliged to publish EN 1663:1997 as a British Standa
8、rd. However, attention is drawn to the fact that during the development of this European Standard the United Kingdom has consistently voted against its approval as a European Standard. The UK believes that the corresponding ISO Standard, ISO 7043:1997 should have been implemented as the European Sta
9、ndard. As far as the UK is concerned, it is dangerous and not acceptable to have a separate European Standard that differs from the corresponding ISO Standard by the across flats dimension for one size of fastener, all other requirements being identical between the two standards concerned. As part o
10、f BSIs duty of care, we draw attention to users of this standard to our concerns that M10 nuts to this standard differ from similar fasteners conforming to ISO 7043:1997 in the across flats dimension only. This is 16 mm in the European Standard and 15 mm in the ISO. BSI will assume no liability what
11、soever for the failure on the part of any user of this standard not to consider this aspect. Precautions are urged to ensure that comingling of M10 nuts to the two standards concerned is avoided. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of
12、 pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050
13、 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1663:1997 E EUROPEAN STANDARDEN 1663 NORME EUROPE ENNE EUROPA ISCHE NORM December 1997 ICS 21.060.20 Descriptors: Fasteners, nuts: fasteners, hexagonal nuts, flanged nu
14、ts, self-locking nuts, metals, dimensions, dimensional tolerances, characteristics, verification, designation English version Prevailing torque type hexagon nuts with flange (with non-metallic insert) (ISO 7043:1997, modified) Ecrous hexagonaux a embase, autofreines, (avec anneau non me tallique) (I
15、SO 7043:1997, modifie e) Sechskantmuttern mit Klemmteil und Flansch (mit nichtmetallischem Einsatz) (ISO 7043:1997, modifiziert) This European Standard was approved by CEN on 1997-10-24. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for givi
16、ng 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 Central Secretariat or to any CEN member. This European Standard exists in three official versi
17、ons (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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, C
18、zech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 1663:1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 185, Threaded and
19、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 June 1998, and conflicting national standards shall be w
20、ithdrawn at the latest by June 1998. According to the CEN/CENELEC 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,
21、 Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 7043:1997 was approved by CEN as a European Standard with agreed common modifications given as below. The dimensions of nuts correspond to thos
22、e given in EN 1661 plus prevailing torque feature. Nuts according to this European Standard correspond to those specified in the International Standard ISO 7043 with the exception that the width across flats for M10 is 16 mm (instead of 15 mm) and that the property class 9 was deleted. Page 3 EN 166
23、3:1997 BSI 1998 1) Prevailing torque element, shape optional. 2) mwis the wrenching height; see note to Table 1. 3) u = 90 to 120 4) d = 15 to 25 5) c is measured at dw min. 6) Edge contour optional. Figure 1 1 Scope This European Standard specifies the characteristics of prevailing torque type hexa
24、gon nuts with flange, with non-metallic annular insert and coarse threads from M5 to M20 inclusive, in product grade A for threads up to and including M16 and product grade B for threads above M16 and with property classes 8 and 10. 2 Normative references This European Standard incorporates by dated
25、 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, subsequent amendments to or revisions of any of these publications apply to this European Standard on
26、ly when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 493, Fasteners Surface discontinuities Nuts prEN ISO 2320, Prevailing torque type steel hexagon nuts Mechanical and performance properties (ISO/DIS 2320:1994) prE
27、N ISO 4042, Fasteners Electroplated coatings (ISO/DIS 4042:1996) prEN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C (ISO/DIS 4759-1:1997) ISO 724, ISO general purpose metric screw threads Basic dimensions ISO 965-2, ISO general purpose metric sc
28、rew threads Tolerances Part 2: Limits of sizes for general purpose bolt and nut threads Medium quality ISO 3269, Fasteners Acceptance inspection ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts 3 Dimensions Dimensions shall be in accordance with Figure 1 and Table 1. NOTESy
29、mbols and designations of dimensions are specified in EN 20225. Page 4 EN 1663:1997 BSI 1998 Table 1 Dimensions in millimetres Thread (d)M5M6M8M10M12(M14)1)M16M20 P 2) 0,811,251,51,75222,5 cmin.11,11,21,51,82,12,43 damin.5,006,008,0010,01214,016,020,0 max.5,756,758,7510,81315,117,321,6 dcmax.11,814,
30、217,921,82629,934,542,8 dwmin.9,812,215,819,623,827,631,939,9 e min.8,7911,0514,3817,7720,0323,3626,7532,95 hmax.7,109,1011,113,516,118,220,324,8 min.6,528,5210,412,815,416,919,022,7 m3)min.4,75,77,69,611,613,315,318,7 mwmin.2,53,14,65,96,87,78,910,7 s max.8,0010,0013,0016,0018,0021,0024,0030,00 min
31、.7,789,7812,7315,7317,7320,6723,6729,16 r 4) max.0,30,360,480,60,720,880,961,2 1)The size in brackets should be avoided if possible. 2) P is the pitch of the thread. 3)Minimum thread height. 4) Radius r applies both at the corners and the flats of the hexagon. NOTEIf the product passes the gauging g
32、iven in annex A, the requirements for dimensions e, c and mware satisfied. Page 5 EN 1663:1997 BSI 1998 Table 2 Material Nut bodySteel InsertFor example, polyamid General requirementsInternational StandardISO 8992 Thread Tolerance6H International StandardsISO 724, ISO 965-2 Property class810 Mechani
33、cal andStyle decisive ford # M16d M16 performance propertiesmechanical properties1) style 1style 2style 1 European StandardprEN ISO 2320 Product grade For d # M16: A TolerancesFor d M16: B European StandardprEN ISO 4759-1 As processed Requirements for electroplated coatings are covered in prEN ISO 4
34、042. FinishIf different electroplating requirements are desired or if requirements are needed for other finishes, they should be negotiated between customer and supplier. Limits for surface discontinuities are covered in EN 493. AcceptabilityFor acceptance inspection ISO 3269 applies. 1)Based on the
35、 thread height (dimension mmin) nuts to this standard are of style 2. However, since for style 2 prEN ISO 2320 does not specify mechanical properties for all property classes and sizes as specified in this standard, in some cases nuts have to be tested according to style 1. 4 Requirements and refere
36、nce European or International Standards The requirements given in Table 2 apply. If, in special cases, specifications other than those listed in this European Standard are required, they shall be selected, from existing European or International Standards, for example ISO 724, ISO 965-2, prEN ISO 23
37、20, prEN ISO 4759-1. 5 Designation EXAMPLE Designation of a prevailing torque type hexagon nut with flange, with non-metallic insert, thread M12 and property class 8: Hexagon nut EN 1663 M12 8 Page 6 EN 1663:1997 BSI 1998 1) Gauge A 2) Gauge B 3) Gauge C NOTE Wa, min= etheoretical Wb, max= emin2 0,0
38、1 mm Ta, max= mw, min Figure A.1 Table A.1 Dimensions in millimetres ThreadGauge AGauge BGauge C WaTaWbTbWcTc max.min.max.min.max.min.min.min.max.min. M509,259,242,502,498,788,773141,081,07 M6011,5611,553,103,0911,0411,034161,191,18 M8015,0215,014,604,5914,3714,364201,311,30 M1018,4918,485,905,8917,
39、7617,755241,651,64 M1220,7920,786,806,7920,0220,015292,202,19 M1424,2624,257,707,6923,3523,34632,52,552,54 M1627,7227,718,908,8926,7426,736372,962,95 M2034,6534,6410,7010,6932,9432,936453,703,69 Annex A (normative) Gauging of hexagon nuts with flange A.1 Recommended method for gauging of hexagon (se
40、e 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, wrenching height, corner fill and width across corners. Gauge A shall be placed over the hexagon and shall be seated on the flange. Gauge B shall
41、 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 (see Figure A.1 and Table A.1) Gauge C is a flat feeler or ring gauge. It is used to prove that the flange thickness at the junction of the gauge with the hex
42、agon portion is equal to or greater than specified values. The acceptance criterion is that gauge C will fit under gauge A without contact when the nut is seated on a flat plate. blank BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
43、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It p
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