1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1664:1998 The Europ
2、ean Standard EN 1664:1997 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 all-metal hexagon nuts with flange (ISO 7044:1997, modified)This British Standard, having been prepared under the direction of th
3、e 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 29327 0 BS EN 1664:1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the English language vers
4、ion of EN 1664:1997. 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 to the responsib
5、le 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 request to its se
6、cretary. 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 by using the “Find” facility of the BSI Standa
7、rds 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 1664:1997 as a British Standard. Howev
8、er, 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 7044:1997 should have been implemented as the European Standard. As
9、 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 of BSIs du
10、ty 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 7044:1997 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 whatsoever fo
11、r 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 pages Th
12、is 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 Brussels
13、1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1664:1997 E EUROPEAN STANDARD EN 1664 NORME EUROPE ENNE EUROPA ISCHE NORM December 1997 ICS 21.060.20 Descriptors: Fasteners, nuts: fasteners, hexagonal nuts, flanged nuts, self
14、locking nuts, metals, dimensions, dimensional tolerances, characteristics, verification, designation English version Prevailing torque type all-metal hexagon nuts with flange (ISO 7044:1997, modified) Ecrous hexagonaux a embase, autofreine s, tout me tal (ISO 7044:1997, modifie e) Sechskantmuttern m
15、it Klemmteil und Flansch, Ganzmetallmuttern (ISO 7044:1997, 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 giving this European Standard the status of a national stand
16、ard 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 versions (English, French, German). A version in any other la
17、nguage 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, Czech Republic, Denmark, Finland, France, Germany, Greece
18、, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1664:1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 185 , Threaded and non-threaded mechanical fasteners and accessories, the s
19、ecretariat 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 withdrawn at the latest by June 1998. According to the CE
20、N/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, Luxembourg, Netherlands, Norway, Portugal, Spain, Swede
21、n, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 7044:1997 was approved by CEN as a European Standard with agreed common modifications given as below. The dimensions of nuts correspond to those given in EN 1661 plus prevailing torque feature. Nuts
22、according to this European Standard correspond to those specified in the International Standard ISO 7044 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 1664:1997 BSI 1998 1) Prevailing torque element, shape optio
23、nal. 2) m w is the wrenching height; see note to Table 1. 3) u =9 08to 1208. 4) d =1 58to 258. 5) c is measured at d wm i n . 6) Edge contour optional. Figure 1 1 Scope This European Standard specifies the characteristics of prevailing torque type all-metal hexagon nuts with flange and threads from
24、M5 up 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, 10 and 12. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normati
25、ve 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 only when incorporated in it by amendment or revision. For undated referen
26、ces 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) prEN ISO 4042, Fasteners Electroplated coatings (ISO/DIS 4042:1996) prEN IS
27、O 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C (ISO/DIS 47591:1997) 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 bolt a
28、nd 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. NOTE Symbols and designations of dimensions are specified in EN 20225.Page 4 EN
29、 1664:1997 BSI 1998 Table 1 Dimensions in millimetres Thread (d) M5 M6 M8 M10 M12 (M14) 1) M16 M20 P 2) 0,8 1 1,25 1,5 1,75 2 2 2,5 c min. 1 1,1 1,2 1,5 1,8 2,1 2,4 3 d a min. 5,00 6,00 8,00 10,0 12 14,0 16,0 20,0 max. 5,75 6,75 8,75 10,8 13 15,1 17,3 21,6 d c max. 11,8 14,2 17,9 21,8 26 29,9 34,5 4
30、2,8 d w min. 9,8 12,2 15,8 19,6 23,8 27,6 31,9 39,9 e min. 8,79 11,05 14,38 17,77 20,03 23,36 26,75 32,95 h max. 6,2 7,3 9,40 11,40 13,80 15,9 18,3 22,4 min. 5,7 6,8 8,74 10,34 12,57 14,8 17,2 20,3 m min. 4,7 5,7 7,6 9,6 11,6 13,3 15,3 18,7 m w min. 2,5 3,1 4,6 5,9 6,8 7,7 8,9 10,7 s max. 8,00 10,00
31、 13,00 16,00 18,00 21,00 24,00 30,00 min. 7,78 9,78 12,73 15,73 17,73 20,67 23,67 29,16 r 3) max. 0,3 0,36 0,48 0,6 0,72 0,88 0,96 1,2 1) The size in brackets should be avoided if possible. 2) P is the pitch of the thread. 3) Radius r applies both at the corners and the flats of the hexagon. NOTE If
32、 the product passes the gauging given in annex A, the requirements for dimensions e, c and m w are satisfied.Page 5 EN 1664:1997 BSI 1998 4 Requirements and reference European or International Standards The requirements given in Table 2 apply. If, in special cases, specifications other than those li
33、sted 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 2320, prEN ISO 4759-1. 5 Designation EXAMPLE Designation of a prevailing torque type hexagon all-metal nut with flange, thread M12 and prope
34、rty class 8: Hexagon nut EN 1664 M12 8 Table 2 Material Steel General requirements International Standard ISO 8992 Thread Tolerance 6H International Standards ISO 724, ISO 965-2 Mechanical and performance properties Property class 8 10 12 Style decisive for mechanical properties 1) d# M16 style 1 d
35、M16 style 2 style 1 style 2 European Standard prEN ISO 2320 Product grade For d# M16: A Tolerances For d M16: B European Standard prEN ISO 4759-1 As processed Requirements for electroplated coatings are covered in prEN ISO 4042. Finish If different electroplating requirements are desired or if requi
36、rements are needed for other finishes, they should be negotiated between customer and supplier. Limits for surface discontinuities are covered in EN 493. Acceptability For acceptance inspection ISO 3269 applies. 1) Based on the nut height (dimension h min ) nuts to this standard are of style 2. Howe
37、ver, 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.Page 6 EN 1664:1997 BSI 1998 Annex A (normative) Gauging of hexagon nuts with flange A.1 Recommended
38、 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, wrenching height, corner fill and width across corners. Gauge A shall be placed over the hexagon and shall be s
39、eated 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 (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
40、junction of the gauge with the hexagon 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. 1 Gauge A 2 Gauge B 3 Gauge C NOTE W a, min = e theoretical W b, max = e min 2 0,01 mm
41、T a, max = m w, min Figure A.1 Table A.1 Dimensions in millimetres Thread Gauge A Gauge B Gauge C W a T a W b T b W c T c max. min. max. min. max. min. min. min. max. min. M5 9,25 9,24 2,50 2,49 8,78 8,77 3 14 1,08 1,07 M6 11,56 11,55 3,10 3,09 11,04 11,03 4 16 1,19 1,18 M8 15,02 15,01 4,60 4,59 14,
42、37 14,36 4 20 1,31 1,30 M10 18,49 18,48 5,90 5,89 17,76 17,75 5 24 1,65 1,64 M12 20,79 20,78 6,80 6,79 20,02 20,01 5 29 2,20 2,19 M14 24,26 24,25 7,70 7,69 23,35 23,34 6 32,5 2,55 2,54 M16 27,72 27,71 8,90 8,89 26,74 26,73 6 37 2,96 2,95 M20 34,65 34,64 10,70 10,69 32,94 32,93 6 45 3,70 3,69blankBSI
43、 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Brit
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