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、9g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSIBS EN 2647:2006This British Standard was
3、 published under the authority of the Standards Policy and Strategy Committee on 31 July 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 It supersedes BS EN 2647:1995 which is withdrawn.The UK participation in its prepar
4、ation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening 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 i
5、nterests informed; monitor related international and European developments and promulgate 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 refe
6、rred to in this document may be found in the BSI Catalogue under the section entitled “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 provis
7、ions of a contract. Users are responsible for its correct application. Compliance with 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
8、a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
9、 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 lubricated - Classification: 900 MPa (at ambient temperature)/235 C Srie arospatiale - crous hexagonaux, freinage interne, orient
10、ables, en acier alli, cadmis, lubrifis MoS2 - Classification: 900 MPa ( temprature ambiante)/235 C Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, fr Neigungsausgleich, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 C This European Standard was app
11、roved 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 Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nation
12、al 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 language made by translation under the responsibility of a CEN member into its own language and noti
13、fied 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, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherl
14、ands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation
15、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2647:2006: ELicensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.5 4 Designation 7 5 Marking .
16、7 6 Technical specification .7 Annex A (informative) Assembly .8 EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI3 Foreword This European Standard (EN 2647:2006) has been prepared by the AeroSpace and Defense Industries Asso-ciation of Europe - Standa
17、rdization (ASD-STAN). After enquiries and 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
18、 be given the status of a national standard, 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 doc
19、ument may be the subject of patent rights. 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:
20、 Austria, Belgium, Cyprus, Czech Republic, 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 docume
21、nt supersedes EN 2647:1995. EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies the characteristics of self-locking hexagonal nuts with ball seat in alloy steel, cadmium plated, MoS2lubricated. Classification: 900 MPa1) /
22、 235 C2) They are intended to be used with washers to EN 2648 or suitable parts, see Annex A. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest ed
23、ition of the referenced document (including any amendments) applies. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions 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 fo
24、rm and position EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers 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 M
25、arking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2648, Aerospace series Washers, concave, in alloy steel, cadmium plated EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace stan-dard parts TR 3791, A
26、erospace series Materials for all metal self-locking nuts and thin wall inserts of temperature classes 425 C3)1) Corresponds 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) Max
27、imum temperature that the nut is able to withstand, without permanent alteration to is original characteristics, after ambient 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 stand
28、ard EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI5 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are expresses in millimetres and apply after cadmium plating but before MoS2lu-bri
29、cation. 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 surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous d
30、eposit shall be present. EN 2491, thickness not specified. EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI6 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 achieve
31、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 this ar
32、ea 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 13,2 1
33、2 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 a sta
34、ndard wrench. c Approximate values (k/1 000 pieces), given for information purposes only. EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI7 4 Designation EXAMPLE Description block Identity block NUT EN2647 060 Number of this standard Code (see Table 1
35、) Note If necessary, the code I9005 shall be placed between the designation block 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
36、 2648): see EN 9133. EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSI8 Annex A (informative) Assembly A.1 Dimensions 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
37、 16,25 5,25 A.2 Examples See Figures A.2 and A.3. Figure A.2 Figure A.3 EN 2647:2006Licensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSIblankLicensed Copy: Wang Bin, na, Wed Aug 23 03:10:58 BST 2006, Uncontrolled Copy, (c) BSIBS EN 2647:2006BSI389 Chiswick High RoadL
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