1、BRITISH STANDARDBS EN 3240:2007Aerospace series Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated Classification: 1 100 MPa (at ambient temperature) / 425 CICS 49.030.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g
2、38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3240:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 60318 1National forewordThis British Standar
3、d is the UK implementation of EN 3240:2007.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purpor
4、t to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
5、3240 December 2007 ICS 49.030.30 English Version Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated - Classification: 1 100 MPa (at ambient temperature) / 425 C Srie arospatiale - crous pincer, freinage interne, en acier rsistant chaud FE-PA2601 (A286), n
6、on revtus - Classification : 1 100 MPa ( temprature ambiante) / 425 C Luft- und Raumfahrt - Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA2601 (A286), blank - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 C This European Standard was approved by CEN on 5 November 2007. CEN members are bo
7、und 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 national standards may be obtained on application to the
8、CEN Management Centre 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 notified to the CEN Management Centre has the same st
9、atus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
10、ia, 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 2007 CEN All rights of exploitation in any form and by any means reserved
11、 worldwide for CEN national Members. Ref. No. EN 3240:2007: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.4 4 Designation 6 5 Marking .6 6 Technical specification and product qualification.6 EN 3240:20073 Foreword This document (EN 3240:2007) has been prepa
12、red 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 the approval of the National Associations and the Official Services of the member countri
13、es 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 June 2008, and conflicting national standards shall be withdrawn at the latest by June 2008. Attention
14、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 to the CEN/CENELEC Internal Regulations, the national standards organizations of the f
15、ollowing 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia,
16、Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3240:20074 1 Scope This standard specifies the characteristics of self-locking clip nuts in FE-PA2601 (A286) for aerospace applications. Classification: 1 100 MPa 1)/ 425 C 2)2 Normative references The following referenced documents are
17、 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. ISO 5855-1, Aerospace MJ threads Part 1: General requirements. ISO 5855-2, Aerospace MJ
18、 threads Part 2: Limit dimensions for bolts and nuts. EN 2424, Aerospace series Marking of aerospace products. EN 3152, Aerospace series Nuts, self-locking, MJ threads, in heat resisting steel FE-PA2601 (A286), silver plated or uncoated Classification: 1 100 MPa (at ambient temperature) / 425 C Tech
19、nical specification. EN 3638, Aerospace series Heat resisting alloy FE-PA2601 (X6NiCrTiMoV26-15) Consumable electrode remelted Solution and precipitation treated Sheet, strip and plate 0,5 mm a 10 mm. EN 3639, Aerospace series Heat resisting alloy FE-PA2601 Softened and cold worked Wire for forged f
20、asteners D 15 mm 900 MPa Rm 1 100 MPa.3)EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts. 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances - Masses The configuration of the clip nut in this standard is given as an example
21、 only. Forms not stated are at the manufacturers option. Only the maximum overall dimensions given in the Table 1 and the interchangeability requirements are imposed. The minimum dimensions are limited by the requirements of the technical specification. Dimensions and tolerances are in millimetres.
22、See Figure 1. 3.2 Material Nut element: EN 3638 or EN 3639 Clip: EN 3638 1) The strength class of the bolt concerned which can withstand the load at ambient temperature when tested at 100 % load without cracking or breaking the nut. 2) Maximum test temperature of the part. 3) Published as ASD Presta
23、ndard at the date of publication of this standard. EN 3240:20075 Thread surfaces will be as achieved by normal method of manufacture Remove sharp edges 0,1 to 0,4 Additional permissible shape Key 1 Deformation in this area to achieve self-locking requirement - Tooling marks acceptable 2 Thread 3 Ide
24、ntity markings 4 Pitch 5 Nut All forms are acceptable within limit dimensions. Figure 1 6,3 View B-B View A-A EN 3240:20076 Table 1 Dimensions and masses Thread A F H K L M N P R T V W X Mass Diameter code Designation a 0,5 max. max. 0,5 0,5 min. 0,5 0,15 0,5 0,5 0,05 max. min. kg/1 000 Panel thickn
25、ess range 040 MJ4x0,7-4H6H 5,8 2,5 050 MJ5x0.8-4H6H 5,5 6,45 6,9 7 1,6 5,2 0,5 13 0,25 2,6 060 MJ6x1-4H5H 8,5 8,05 8,8 2,7 10 2,3 10 6,6 0,75 0,750,63 18,5 0,3 4,3 0,9-2 aThreads to ISO 5855-1 and ISO 5855-2. 4 Designation EXAMPLE Description block NUT Identity block EN3240-060 Number of this standa
26、rd Diameter code (see Table 1) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style F, at the location shown in the Figure 1. 6 Technical specification and product qualification The clip nuts shall be qualified in accordance
27、 with EN 9133, conforming to the requirements of EN 3152. EN 3240:2007blankBS EN 3240:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the
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