EN 3741-2004 en Aerospace series - Nuts clip metric - Installation holes and assembly《航空航天系列 米制夹紧螺母 安装孔及组件》.pdf

《EN 3741-2004 en Aerospace series - Nuts clip metric - Installation holes and assembly《航空航天系列 米制夹紧螺母 安装孔及组件》.pdf》由会员分享，可在线阅读，更多相关《EN 3741-2004 en Aerospace series - Nuts clip metric - Installation holes and assembly《航空航天系列 米制夹紧螺母 安装孔及组件》.pdf（10页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD AEROSPACE SERIES BS EN 3741:2004 Nuts, clip, metric Installation holes and assembly The European Standard EN 3741:2004 has the status of a British Standard ICS 49.030.30 BS EN 3741:2004 This British Standard was published under the authority of the Standards Policy and Strategy Comm

2、ittee on 5 January 2005 BSI 5 January 2005 ISBN 0 580 45185 2 National foreword This British Standard is the official English language version of EN 3741:2004. It supersedes BS EN 3741:2003 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aeros

3、pace fasteners and fastening systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be

4、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 provisions of a contract. Users are r

5、esponsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and ke

6、ep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document in

7、dicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3741 November2004 ICS49.030.30 SupersedesEN3741:2003 Englishversion AerospaceseriesNuts,clip,metricInstallationholesand assembly Sriearospatialecrousp

8、incer,mtriquesTrous dinstallationetmontage LuftundRaumfahrtKlemmuttern,metrisch EinbaulcherundMontage ThisEuropeanStandardwasapprovedbyCENon11September2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalst

9、andardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertherespon

10、sibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malt

11、a,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved

12、worldwideforCENnationalMembers. Ref.No.EN3741:2004:E EN 3741:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Principle4 4 Design instructions .4 4.1 Support design 4 4.1.1 Installation A: “on flank of support“4 4.1.2 Installation B: “with slot“5 4.1.3 Dimensions.5 4.2 Type of

13、 installation 5 4.2.1 Installation A 5 4.2.2 Installation B 6 5 Indication on drawings6 5.1 Definition drawing .6 5.2 Assembly drawing.6 6 Designation 7 EN 3741:2004 (E) 3 Foreword This document (EN 3741:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization

14、 (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be gi

15、ven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 3741:2003. According to the CEN/CENELEC Internal Regulations, t

16、he national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol

17、and, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3741:2004 (E) 4 1 Scope This standard specifies the characteristics of the installation holes required for the utilization of clip nuts with design configuration to EN-Standards for aerospace applications. 2 Normati

18、ve references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3726, Aerospace series Nuts, sel

19、f-locking, clip, in heat resisting steel FE-PA2601 (A286), MoS 2coated Classification: 1 100 MPa (at ambient temperature) / 425 C 3 Principle The self-locking clip nuts are parts held in place on their support by the elastic action of the nut cage. A centering piece located on the tab of the cage en

20、sures the correct installation of the clip nut. Self-locking is ensured by the distortion of the last nut end threads. See Figure 1. Key 1 nut 2 cage 3 centering piece 4 support Figure 1 4 Design instructions 4.1 Support design 4.1.1 Installation A: “on flank of support“ See Figures 2 and 3. EN 3741

21、:2004 (E) 5 Figure 2 Figure 3 4.1.2 Installation B: “with slot“ See Figures 4 and 5. Key 1 F 1 or F 2 aMinimum zone allowing the passage of the tabs depending of the mounting face (see Figure 5). All the shapes capable of enveloping this minimum zone are acceptable. Figure 4 Figure 5 4.1.3 Dimension

22、s See Table 1. Table 1 Dimensions in millimetres C D E F 1F 2Support thickness Diameter code Thread 0,25 max. min. min. min. min. max. min. 040 MJ4X0,7 4H6H 7,1 7 13 050 MJ5X0,8 4H6H 7,5 7 14 14 060 MJ6X1 4H5H 9,5 9,1 8,6 19,5 6,5 16 2 0,9 4.2 Type of installation 4.2.1 Installation A install the cl

23、ip nut on the edge of the support; apply pressure on the cage as illustrated on Figure 3, until the centering piece clears the edge of the support; push the clip nut until the centering piece locates in the hole. EN 3741:2004 (E) 6 4.2.2 Installation B In the case of assembly on inner panels: slide

24、the cage through the support access hole, as illustrated on Figure 5; proceed until the centering piece locates in the hole. 5 Indication on drawings 5.1 Definition drawing EXAMPLE: see Figure 6. Key aWay of assembly Figure 6 5.2 Assembly drawing EXAMPLE: see Figure 7. Key 1 clip nut EN 3726-050 Ass

25、embly EN 3741-050A Figure 7 EN 3741:2004 (E) 7 6 Designation EXAMPLE Identity block EN3741-050A Number of this standard Diameter code (see Table 1) Type of installation (see 4.2) BS EN 3741:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent nationa

26、l 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. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the

27、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 committee responsible, the identity of whi

28、ch 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 standards Orders for all BSI, international and f

29、oreign 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 BSI policy to supply the BSI im

30、plementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic

31、 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 and receive substantial discou

32、nts 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 Online can be found at http:/ww

33、w.bsi- Further information about BSI is available on the BSI website at http:/www.bsi-. Copyright Copyright 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 Copyright, Designs and

34、 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 standard, of nece

35、ssary 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-.