1、BRITISH STANDARD AEROSPACE SERIES BS EN 4118:2004 Nuts, bihexagonal, self-locking, in heat resisting steel FE-PA2601 (A286), silver plated on thread Classification: 1 100 MPa (at ambient temperature) / 650 C The European Standard EN 4118:2004 has the status of a British Standard ICS 49.030.30 Licens
2、ed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GMT 2005, Uncontrolled Copy, (c) BSIBS EN 4118:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 December 2004 BSI 20 December 2004 ISBN 0 580 45103 8 National foreword This British Standard is
3、 the official English language version of EN 4118:2004. It supersedes BS EN 4118:2003 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which has the responsibility to: A list of organizations represent
4、ed 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 found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or
5、 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 responsible for its correct application. Compliance with a British Standard does not of itself confer imm
6、unity 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 keep the UK interests informed; monitor related international and European developments and promulgate the
7、m in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd
8、. No. Date Comments Licensed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GMT 2005, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4118 November 2004 ICS 49.030.30 Supersedes EN 4118:2003 English version Aerospace series - Nuts, bihexagonal, self-locking, in heat resistin
9、g steel FE-PA2601 (A286), silver plated on thread - Classification: 1 100 MPa (at ambient temperature) / 650 C Srie arospatiale - crous bihexagonaux, freinage interne, en acier rsistant chaud FE-PA2601 (A286), argents sur filetage - Classification : 1 100 MPa ( temprature ambiante ) / 650 C Luft- un
10、d Raumfahrt - Zwlfkantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA2601 (A286), Gewinde versilbert - Klasse: 1 100 MPa (bei Raumtemperatur) / 650 C This European Standard was approved by CEN on 11 September 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi
11、ch 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 Central Secretariat or to any CEN member. This European Sta
12、ndard 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 Central Secretariat has the same status as the official versions. CEN members are the national sta
13、ndards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN CO
14、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4118:2004: E Licensed Copy: Wang
15、Bin, na, Fri Dec 02 02:16:47 GMT 2005, Uncontrolled Copy, (c) BSI EN 4118:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.4 4 Designation 6 5 Marking .6 6 Technical specification .6 Licensed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GMT 2005, Uncontroll
16、ed Copy, (c) BSIEN 4118:2004 (E) 3 Foreword This document (EN 4118:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the app
17、roval 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 given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and confl
18、icting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 4118:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, C
19、zech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GM
20、T 2005, Uncontrolled Copy, (c) BSI EN 4118:2004 (E) 4 1 Scope This standard specifies the characteristics of self-locking bihexagonal nuts in FE-PA2601, silver plated on thread, for aerospace applications. Classification: 1 100 MPa 1)/ 650 C 2)2 Normative references The following referenced document
21、s 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. ISO 4095, Aerospace Bihexagonal drives Wrenching configuration Metric series ISO 5
22、855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts EN 2399, Heat resisting steel FE-PA92-HT R m 900 MPa Bar for forged bolts D 25 mm Aerospace series 3)EN 2424, Aerospace series Marking of aerospace products EN 2786, Aerospace series Electrolytic silver plating of fasteners 4)EN
23、 3004, Aerospace series Nuts, self-locking, MJ threads, in heat resisting steel FE-PA2601 (A286) Classification: 1 100 MPa (at ambient temperature) / 650 C Technical specification EN 3639, Aerospace series Heat resisting alloy FE-PA2601 Softened and cold worked Wire for forged fasteners D 15 mm 900
24、MPa R m 1 100 MPa 4)3 Required characteristics 3.1 Configuration Dimensions Tolerances Masses See Figure 1 and Table 1. Dimensions and tolerances are in millimetres. They apply after silver plating for thread surface. 3.2 Materials EN 2399 or EN 3639 3.3 Surface treatment EN 2786 on thread and chamf
25、ers Thickness: thread MJ6: 5 m min. on thread flanks; thread MJ5: shall show complete coverage, without thickness requirement; chamfers: shall show complete coverage, without thickness requirement. 1) Correspond to the minimum tensile stress which the nut is able to withstand at ambient temperature
26、without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum test temperature of the parts 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Prestandard at the date of publication of this standard Licensed Copy: Wang Bin,
27、na, Fri Dec 02 02:16:47 GMT 2005, Uncontrolled Copy, (c) BSIEN 4118:2004 (E) 5 Key 1 values applicable before silver plating. Thread surface will be as achieved by normal methods of manufacture. 2 remove sharp edges 0,1 to 0,4. 3 form out-of-round in this area to achieve the self-locking requirement
28、 (tooling marks permissible). 4 marking 5 bihexagonal configuration in accordance with ISO 4095 over length M 6 thread 7 not convex 8 pitch diameter Details of form not stated are left to the manufacturers discretion. aAll forms of entry (radius or chamfer) are permissible within these limiting dime
29、nsions. Figure 1 Licensed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GMT 2005, Uncontrolled Copy, (c) BSI EN 4118:2004 (E) 6 Table 1 ThreadaE F H J K L M N Y Z Mass kg/1 000 parts Code Designation max. min. max. max. min. min. min. max. 050 MJ50,8-4H6H 5,8 5,2 7 7 9,1 8,3 2 4,9 1,63 060 MJ61-4H5H 7,1 6
30、,3 8 8,110,6 9,8 2,3 5,5 2,33 070 MJ71-4H5H 8,1 7,3 9 9,112,111,3 2,6 6,1 3,19 080 MJ81-4H5H 9,1 8,3 10 10,413,612,8 2,8 6,9 0,1 0,2 4,34 100 MJ101,25-4H5H 11,1 10,3 12 13 16,8 15,8 1,2 3,1 8,8 7,69 120 MJ121,25-4H5H 13,1 12,3 14 15 19,9 18,8 1,4 3,5 10,1 0,13 14,58 140 MJ141,5-4H5H 15,2 14,4 17 17,
31、5 23 21,9 1,7 4 12,6 0,15 0,3 19,79 aIn accordance with ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. 4 Designation EXAMPLE Description block NUT Identity block EN4118-050 Number of this standard Thread code (see Table 1) NOTE If necessary, the code I9005 sh
32、all be placed between the description block and the identity block. 5 Marking EN 2424, style A, as indicated on Figure 1. 6 Technical specification EN 3004 Licensed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GMT 2005, Uncontrolled Copy, (c) BSIblank Licensed Copy: Wang Bin, na, Fri Dec 02 02:16:47 GMT
33、2005, Uncontrolled Copy, (c) BSIBS EN 4118:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporat
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