1、BRITISH STANDARD AEROSPACE SERIESBS EN2647:2006Nuts, hexagonal, self-locking, ball seat, in alloy steel, cadmium plated, MoS2 lubricated Classification: 900 MPa (at ambient temperature)/235 CThe European Standard EN 2647:2006 has the status of a British StandardICS 49.030.30g49g50g3g38g50g51g60g44g4
2、9g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2647:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 J
3、uly 2006 BSI 2006ISBN 0 580 48534 XNational forewordThis British Standard is the official English language version of EN 2647:2006. It supersedes BS EN 2647:1995 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening
4、systems, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promul
5、gate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled
6、 “International Standards Correspondence 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. Compliance wit
7、h a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis 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 document indicates when the d
8、ocument was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2647 June 2006 ICS 49.030.30 Supersedes EN 2647:1995 English Version Aerospace series - Nuts, hexagonal, self-locking, ball seat, in alloy steel, cadmium plated, MoS2
9、 lubricated - Classification: 900 MPa (at ambient temperature)/235 C Srie arospatiale - crous hexagonaux, freinage interne, orientables, en acier alli, cadmis, lubrifis MoS2 - Classification: 900 MPa ( temprature ambiante)/235 C Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, fr Neigungsausg
10、leich, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 C This European Standard was approved by CEN on 3 February 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standar
11、d 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 versions (English, French, Ge
12、rman). 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, Cyprus, Czech Republic, D
13、enmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMAL
14、ISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2647:2006: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required
15、characteristics.5 4 Designation 7 5 Marking .7 6 Technical specification .7 Annex A (informative) Assembly .8 EN 2647:20063 Foreword This European Standard (EN 2647:2006) has been prepared by the AeroSpace and Defense Industries Asso-ciation of Europe - Standardization (ASD-STAN). After enquiries an
16、d votes carried out in accordance with the rules of this Association, this Standard has re-ceived the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national stand
17、ard, either by publication of an identical text or by endorsement, at the latest by December 2006, and conflicting national standards shall be withdrawn at the latest by December 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent right
18、s. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republi
19、c, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer-land and the United Kingdom. This document supersedes EN 2647:1995. EN 2647:2006
20、4 1 Scope This standard specifies the characteristics of self-locking hexagonal nuts with ball seat in alloy steel, cadmium plated, MoS2lubricated. Classification: 900 MPa1) / 235 C2) They are intended to be used with washers to EN 2648 or suitable parts, see Annex A. 2 Normative references The foll
21、owing referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimension
22、s for bolts and nuts ISO 5858, Aerospace Self-locking nuts with maximum operating temperature 425 C Procurement specification ISO 8788, Aerospace Nuts, metric Tolerances of form and position EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufactu
23、rers EN 2133, Aerospace series Cadmium plating of steels, with maximum specified tensile strength 1 450 MPa, copper, copper alloys and nickel alloysEN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2648, Aerospac
24、e series Washers, concave, in alloy steel, cadmium plated EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace stan-dard parts TR 3791, Aerospace series Materials for all metal self-locking nuts and thin wall inserts of temperature classes 425 C3)1) Corresponds
25、to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to is original characteristics, after ambien
26、t temperature has been restored. The maximum temperature is conditioned by the cadmium plating. 3) Published as AECMA Technical Report at the date of publication of this standard EN 2647:20065 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tol
27、erances are expresses in millimetres and apply after cadmium plating but before MoS2lu-brication. Details of form not stated are at the manufacturers option. 3.2 Tolerances of form and position See ISO 8788. 3.3 Materials See TR 3791. 3.4 Surface treatments EN 2133, 5 m min. on threads and all surfa
28、ces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present. EN 2491, thickness not specified. EN 2647:20066 Remove sharp edges 0,1 to 0,4. Key 1 Marking (Optional location, at the manufacturers discretion) 2 Form out-of-round in this area to ach
29、ieve the self-locking torque requirementb3 Thread 4 Chamfer, radius or broken edge 5 Spherical aThese values in micrometres apply before surface treatment. They do not apply to threads the surface texture of which will be as achieved by usual manufacturing methods. bTooling marks are permitted in th
30、is area Figure 1 Table 1 EbFbG H J M N P R T Diameter code Threadamin. 0,2 max. min. min. min. min. 05,0Massc050 MJ50,8-4H6H 6,5 6 10,3 7,05 5,5 1,7 2 2,05 8 7,5 1,7 060 MJ61-4H6H 7,6 7 h12 13 8,1 6,5 2,5 2,3 2,7 9 8,4 2,5 080 MJ81-4H6H 10,9 10 17 9,7 8,5 3 3,2 2,5 12,5 11,75 6,5 100 MJ101,25-4H6H 1
31、3,2 12 21 11,95 10,5 4 3,3 2,95 16 15,1 11,3 120 MJ121,25-4H6H 15,5 14 h13 24 13,46 12,5 4,5 4,5 2,65 18 16,9 17,4 a In accordance with ISO 5855-2. In self-locking zone the tolerance apply before forming out-of-round. b These dimensions apply before forming out-of-round, but finished nuts shall fit
32、a standard wrench. c Approximate values (k/1 000 pieces), given for information purposes only. EN 2647:20067 4 Designation EXAMPLE Description block Identity block NUT EN2647 060 Number of this standard Code (see Table 1) Note If necessary, the code I9005 shall be placed between the designation bloc
33、k and the identity block. 5 Marking EN 2424, style N plus diameter code. See Figure 1. 6 Technical specification ISO 5858, except for: Approval of manufacturers: see EN 2000; Qualification of products, nut and washer (EN 2648): see EN 9133. EN 2647:20068 Annex A (informative) Assembly A.1 Dimensions
34、 See Figure A.1 and Table A.1. Figure A.1 Table A.1 V W Diameter code max. min. 050 8,25 3,05 060 9,1 3,5 080 11,4 4 100 13,95 4,75 120 16,25 5,25 A.2 Examples See Figures A.2 and A.3. Figure A.2 Figure A.3 EN 2647:2006blankBS EN 2647:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards In
35、stitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards sh
36、ould make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical commit
37、tee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.Buying standardsOrders
38、 for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-.In response to orders for international standards, it is
39、 BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters S
40、ervice. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-.Subscribing members of BSI are kept up to date with standards developments a
41、nd receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-.Information regarding online access to British Standards via British Standards Onl
42、ine can be found at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copy
43、right, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI.This does not preclude the free use, in the course of implementing the
44、standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.
