1、BS EN 3757:2009ICS 49.030.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Nuts, anchor, self-locking, floating, self-aligning, two lugs, inheat resisting steel,MoS2 lubricated Classification: 900MPa (at ambienttemperature) / 315 CLicensed Copy
2、: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c) BSIThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 BSI 2010ISBN 978 0 580 68570 5Amendments/corrigenda issued since publicationDate CommentsBS EN 3757:
3、2009National forewordThis British Standard is the UK implementation of EN 3757:2009.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained onrequest to its sec
4、retary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Un
5、controlled Copy, (c) BSIBS EN 3757:2009EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3757 November 2009 ICS 49.030.30 English Version Aerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lugs, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambien
6、t temperature) / 315 C Srie arospatiale - crous river, freinage interne, flottants, orientables, double patte, acier rsistant chaud, lubrifis MoS2 - Classification : 900 MPa ( temprature ambiante) / 315 C Luft- und Raumfahrt - Annietmuttern, selbstsichernd, schwenkbar, beiderseitiger Flansch, aus ho
7、chwarmfestem Stahl, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 315 C This European Standard was approved by CEN on 17 October 2009. 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
8、 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A versio
9、n in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denm
10、ark, 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 NORMALISA
11、TION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3757:2009: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Unco
12、ntrolled Copy, (c) BSIBS EN 3757:2009EN 3757:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Required characteristics .5 4 Designation 7 5 Marking .7 6 Technical specification .7 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c)
13、BSIBS EN 3757:2009EN 3757:2009 (E) 3 Foreword This document (EN 3757:2009) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received
14、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 standard, either by publication of an identical text or by endorsement, at the latest by May 2010, and
15、conflicting national standards shall be withdrawn at the latest by May 2010. Attention is drawn to the possibility that some of the elements of this document 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
16、 to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, L
17、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c) BSIBS EN 3757:2009EN 3757:2009 (E) 4 1 Scope This Europe
18、an Standard specifies the characteristics of self-locking, floating, self-aligning, two lugs anchor nuts, in heat resisting steel, MoS2-lubricated. Classification: 900 MPa 1) / 315 C 2). 2 Normative references The following referenced documents are indispensable for the application of this document.
19、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2424:2008, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods
20、 EN 9100, Quality Management Systems Requirements for Aviation, Space and Defense Organizations EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 5858, Aerospace N
21、uts, self-locking, with maximum operating temperature less than or equal to 425 C Procurement specification ISO 8788, Aerospace Nuts, metric Tolerances of form and position ISO 12273, Aerospace Nuts, anchor, self-locking, floating, self-aligning, two lug, with MJ threads, classifications: 900 MPa (a
22、t ambient temperature)/235 C, 900 MPa (at ambient temperature)/315 C and 900 MPa (at ambient temperature)/425 C Dimensions TR 3791, Aerospace series Materials for self-locking nuts, threaded inserts and screw thread inserts of temperature classes 425 C 3)1) Corresponds to the minimum tensile stress
23、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 its original characteristics, after ambient temperature has been restor
24、ed. The maximum temperature is conditioned by the surface treatment. 3) Published as ASD-STAN Technical Report at the date of publication of this standard. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c) BSIBS EN 3757:2009EN 3757:2009 (E) 5 3 Required
25、characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are in conformity with ISO 12273, expressed in millimetres and apply before MoS2lubrication. Details of form not stated are at the manufacturers option. 3.2 Tolerances of form and position ISO 878
26、8. 3.3 Materials TR 3791. 3.4 Surface treatment EN 2491, thickness not specified, mandatory on threads, optional on other surfaces. These values in micrometres apply before surface treatment. They do not apply tothreads punched holes or sheared edges, the surface texture of which will be as achieved
27、 by usual manufacturing methods. Remove sharp edges 0,1 to 0,4. 6,3 3,2 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c) BSIBS EN 3757:2009EN 3757:2009 (E) 6 Key 1 Marking 2 Float inclusive 3 Convex washer 4 Threaded element 5 Thread 6 Form out-of-round
28、 in this area to achieve the self-locking torque requirements. Tooling marks are permitted in this area. 7 Cage a 8 minimum alignment in any direction from central position Figure 1 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c) BSIBS EN 3757:2009EN 3
29、757:2009 (E) 7 Table 1 Diameter code Thread aE F H K L M NbP R S T Z Massc+ 0,2 0 Radial float min. max. max. max. max. min. max. min. 050 MJ50,8-4H6H 8,75 17,5 3,5 15,2 23,7 8,3 0,9 6,63 2,5 7,2 0,7 2,6 060 MJ61-4H5H 12,7 25,4 4 17 31,6 10,21,1 7,6 7,8 0,75 5,8 080 MJ81-4H5H 5 20,5 32,6 11,8 11 3,5
30、 3 8,4 9 aIn accordance with ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. bMeasured at the rivet hole location. cApproximate values (kg/1 000 pieces), given for information purposes only. 4 Designation EXAMPLE Description block NUT Identity block EN3757060
31、Number of this standard Diameter code (see Table 1) NOTE If necessary the originator code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424:2008, style N. See Figure 1. 6 Technical specification ISO 5858, except for: Approval of manufacturers: see EN 9100;
32、 Qualification of products: see EN 9133. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/09/2010 08:50, Uncontrolled Copy, (c) BSIBS EN3757:2009BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the
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