1、BRITISH STANDARDBS EN 3728:2008Aerospace series Shaft-nuts, self-locking, left-hand thread, in heat resisting steel FE-PA92HT (A286), silver platedICS 49.030.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44
2、g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3728:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 May 2008 BSI 2008ISBN 978 0 580 60978 7National forewordThis British Standard is the UK implementation of EN 3728:20
3、08.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 purport to include all the necessary provision
4、s 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 STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3728April 2008ICS 49.030.30English Version
5、Aerospace series - Shaft-nuts, self-locking, left-hand thread, inheat resisting steel FE-PA92HT (A286), silver platedSrie arospatiale - crous darbre, freinage interne,filetage gauche, en acier rsistant chaud FE-PA92HT(A286), argentsLuft- und Raumfahrt - Wellenmuttern, selbstsichernd,Linksgewinde, au
6、s hochwarmfestem Stahl FE-PA92HT(A286), versilbertThis European Standard was approved by CEN on 29 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alt
7、eration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 tran
8、slationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany,
9、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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagemen
10、t Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3728:2008: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.4 3.1 Configuration Dimensions Tol
11、erances Masses.4 3.2 Material .4 3.3 Surface treatment 4 4 Designation 7 5 Marking .7 6 Technical specification .7 BS EN 3728:20083 Foreword This document (EN 3728:2008) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and
12、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 ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard
13、, either by publication of an identical text or by endorsement, at the latest by October 2008, and conflicting national standards shall be withdrawn at the latest by October 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CE
14、N 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 following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Re
15、public, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3728:20084 1 Scope This standard specifies
16、the characteristics of self-locking shaft-nuts, with left-hand threads, in FE-PA92HT, silver plated, chiefly used for axial location of bearing inner rings on shafts. Maximum test temperature of the parts: 450 C. NOTE These parts are designed to be used with 4g6g external threads. 2 Normative refere
17、nces 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 2171 1), Heat resisting steel FE-PA92-HT
18、Rm 900 MPa Bars Aerospace series 2)EN 2424, Aerospace series Marking of aerospace products EN 2786, Aerospace series Electrolytic silver plating of fasteners EN 3299, Aerospace series Shaft-nuts and threaded rings, self-locking, right- or left-hand MJ threads, in heat resisting steel FE-PA2601 (A286
19、), silver plated Technical specification EN 4317, Aerospace series Heat resisting alloy FE-PA2601 (X6NiCrTiMoV26-15) Non heat treated, forging stock a or D 200 mm EN 4318, Aerospace series Heat resisting alloy FE-PA2601 (X6NiCrTiMoV26-15) Solution treated and precipitation treated, bar and section D
20、e 100 mm, Rm 960 MPa ISO 5855-1, Aerospace MJ threads Part 1: General requirements 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. 3.2 Material EN 2171 3.3 Surface treat
21、ment EN 2786 Thickness: external surfaces: 5 m to 15 m; thread: 5 m min. shall be measured at the pitch diameter. 1) Inactive for new designation, see EN 4317 and EN 4318. 2) Published as ASD Standard at the date of publication of this standard. BS EN 3728:20085 Values applicable before silver plati
22、ng. Thread surface will be as achieved by normal methods of manufacture. Remove sharp edges 0,1 to 0,4. Key 1 N equally spaced scallops 2 Chamfer at the manufacturers discretion 3 Marking 4 Thread 5 Pitch diameter 6 Slot to indicate left-hand thread Details of form not stated and self-locking featur
23、e are left to the manufacturers discretion. Figure 1 6,3 0,8 BS EN 3728:20086 Table 1 Left-hand thread a E F H J K M N P b S Code Designation 0,2 0 0,2 + 0,2 0,1 0,1 0,2 0,1 min. 0,2 Mass kg/1 000parts 012 MJ121,25-4H5H-LH 12,5 6 7 3,5 10 1,7 7,5 013 MJS131,25-4H5H-LH 13,5 7 19 18 11 8 014 MJ141,5-4
24、H5H-LH 14,5 20 19 11,7 8,5 015 MJ151,5-4H5H-LH 15,5 21 20 12,7 8,9 016 MJ161,5-4H5H-LH 16,5 22 21 13,7 9,3 017 MJ171,5-4H5H-LH 17,5 8 23 22 14,7 9,7 018 MJ181,5-4H5H-LH 18,5 24 23 15,7 10,1 019 MJS191,5-4H5H-LH 19,5 9 25 24 16,7 10,5 020 MJ201,5-4H5H-LH 20,5 26 25 17,7 11 021 MJS211,5-4H5H-LH 21,5 1
25、8,7 11,8 022 MJ221,5-4H5H-LH 22,5 27 26 19,7 12,6 023 MJS231,5-4H5H-LH 23,5 10 29 28 20,7 13,4 024 MJ241,5-4H5H-LH 24,5 11 30 29 21,7 14,2 025 MJ251,5-4H5H-LH 25,5 12 31 30 4 22,7 15 026 MJ261,5-4H5H-LH 26,5 8 7,5 33 32 3,8 23,7 1,9 15,5 027 MJ271,5-4H5H-LH 27,5 34 33 24,7 16,5 028 MJ281,5-4H5H-LH 2
26、8,5 35 34 25,7 17,5 029 MJS291,5-4H5H-LH 29,5 9 8 36 35 4 6 26,7 18 030 MJ301,5-4H5H-LH 30,5 37 36 27,7 19 031 MJS311,5-4H5H-LH 31,5 38 37 28,7 19,8 032 MJ321,5-4H5H-LH 32,5 39 38 29,7 20,5 033 MJ331,5-4H5H-LH 33,5 40 39 30,7 21,5 034 MJS341,5-4H5H-LH 34,5 41 40 31,7 22,5 035 MJ351,5-4H5H-LH 35,5 10
27、 42 41 32,7 23 036 MJ361,5-4H5H-LH 36,5 43 42 33,7 23,5 037 MJS371,5-4H5H-LH 37,5 44 43 34,7 24,5 038 MJ381,5-4H5H-LH 38,5 11 45 44 35,7 25,5 039 MJ391,5-4H5H-LH 39,5 46 45 36,7 26,5 040 MJ401,5-4H5H-LH 40,5 12 8 48 47 4 6 37,7 2 27 aIn conformity with ISO 5855-1 in none self-locking zone. bMinimum
28、diameter of internal envelope circle after realizing self-locking feature. BS EN 3728:20087 4 Designation EXAMPLE Description block NUT Identity block EN3728-040 Number of this standard Thread code (see Table 1) NOTE If necessary, the code I9005 shall be placed between the description block and the
29、identity block. 5 Marking EN 2424, style A, as indicated on the Figure 1. 6 Technical specification EN 3299 BS EN 3728:2008BS EN 3728:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It present
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