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1、BRITISH STANDARD BS EN 3240:2007 Aerospace series Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated Classification: 1 100 MPa (at ambient temperature) / 425 C ICS 49.030.30 ? Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT
2、+00:00 2008, Uncontrolled Copy, (c) BSI BS EN 3240:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008 ISBN 978 0 580 60318 1 National foreword This British Standard is the UK implementation of EN 3240:2007. The UK p
3、articipation 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 purport to include all the necessary provisions of a co
4、ntract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+
5、00:00 2008, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 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 Sr
6、ie arospatiale - crous pincer, freinage interne, en acier rsistant chaud FE-PA2601 (A286), non 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 Raumtemperatu
7、r) / 425 C This European Standard was approved by CEN on 5 November 2007. 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 bibliogr
8、aphical 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 version in any other language made by translation under the responsibility of
9、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, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irelan
10、d, 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 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart,
11、36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3240:2007: E Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 2 Conten
12、ts Page Foreword3 1 Scope 4 2 Normative references4 3 Required characteristics.4 4 Designation 6 5 Marking.6 6 Technical specification and product qualification.6 EN 3240:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled
13、Copy, (c) BSI 3 Foreword This document (EN 3240:2007) 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 the approval of the N
14、ational 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 June 2008, and conflicting national
15、 standards shall be withdrawn at the latest by June 2008. 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 to the CEN/CENELEC
16、 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, Lithuania, Luxembour
17、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3240:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 4 1 Scope This stand
18、ard 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 indispensable for the application of this document. For dated references, only the edition
19、 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 threads Part 2: Limit dimensions for bolts and nuts. EN 2424, Aerospace series Marking of
20、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 Technical specification. EN 3638, Aerospace series Heat resisting alloy FE-PA2601 (X6NiCrTiMoV2
21、6-15) 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 fasteners D 15 mm 900 MPa Rm 1 100 MPa. 3) EN 9133, Aerospace series Quality management syst
22、ems 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 only. Forms not stated are at the manufacturers option. Only the maximum overall dimensi
23、ons 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. See Figure 1. 3.2 Material Nut element: EN 3638 or EN 3639 Clip: EN 3638 1) The strength
24、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 Prestandard at the date of publication of this standard. EN 3240:2007 Licensed Copy: London Sou
25、th Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 5 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 req
26、uirement - Tooling marks acceptable 2 Thread 3 Identity markings 4 Pitch 5 Nut All forms are acceptable within limit dimensions. Figure 1 6,3 View B-B View A-A EN 3240:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled Cop
27、y, (c) BSI 6 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 0,5min. 0,5 0,15 0,5 0,5 0,05max. min. kg/1 000 Panel thickness 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 8,0
28、5 8,8 2,7 10 2,3 10 6,6 0,750,75 0,63 18,5 0,3 4,3 0,9-2 a Threads to ISO 5855-1 and ISO 5855-2. 4 Designation EXAMPLE Description block NUT Identity block EN3240-060 Number of this standard Diameter code (see Table 1) NOTE If necessary, the code I9005 shall be placed between the description block a
29、nd 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 with EN 9133, conforming to the requirements of EN 3152. EN 3240:2007 Licensed Copy: London South Bank Universi
30、ty, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:58:02 GMT+00:00 2008, Uncontrolled Copy, (c) BSI BS EN 3240:2007 BSI 389 Chiswick High Road London W4 4AL BS
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