1、BRITISH STANDARDBS EN 3020:2008Aerospace series Self-locking plate nuts, floating, two-lug, in heat resisting steel FE-PA92HT (A286), silver plated Classification: 1 100 MPa (at ambient temperature)/650 CICS 49.030.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54
2、g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3020:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2008 BSI 2008ISBN 978 0 580 60515 4National forewordTh
3、is British Standard is the UK implementation of EN 3020:2008. 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 publicat
4、ion does not purport 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
5、EUROPISCHE NORM EN 3020 May 2008 ICS 49.030.30 English Version Aerospace series - Self-locking plate nuts, floating, two-lug, in heat resisting steel FE-PA92HT (A286), silver plated - Classification: 1 100 MPa (at ambient temperature)/650 C Srie arospatiale - Ecrous river freinage interne, flottants
6、, double patte, en acier rsistant chaud FE-PA92HT(A286), argents - Classification: 1 100 MPa ( temprature ambiante)/650 C Luft- und Raumfahrt - Selbstsichernde Annietmuttern, beweglich, beidseitiger Flansch, aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert - Klasse: 1 100 MPa (bei Raumtemperatu
7、r)/650 C This European Standard was approved by CEN on 12 December 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 bibliogra
8、phical 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 a
9、 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, Ireland
10、, 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, 3
11、6 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3020:2008: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.4 3.1 Configuration, dimensions, tolerances, masses4 3.2 Mat
12、erial .4 3.3 Surface treatment 5 4 Designation 6 5 Marking .6 6 Technical specification .6 Figures Figure 1 Configuration 5 Tables Table 1 Dimensions and masses. 6 BS EN 3020:20083 Foreword This document (EN 3020:2008) has been prepared by the Aerospace and Defence Industries Association of Europe -
13、 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 countries of ASD, prior to its presentation to CEN. This European Standard
14、 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2008, and conflicting national standards shall be withdrawn at the latest by November 2008. Attention is drawn to the possibility that some of the elements of th
15、is 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 following countries are bound to implement this European Sta
16、ndard: 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, Slovenia, Spain, Sweden, Switzerland and the United Kingdom
17、. BS EN 3020:20084 1 Scope This standard specifies the characteristics of self-locking, floating plate nuts in FE-PA2601, silver plated, for aerospace applications. Classification: 1 100 MPa1)/650 C2)2 Normative references The following referenced documents are indispensable for the application of t
18、his document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2399, Heat resisting steel FE-PA92-HT Rm 900 MPa Bars for forged bolts D 25 mm Aerospace series3)EN 2424, Aerospace series
19、Marking of aerospace products4) EN 2786, Aerospace series Electrolytic silver plating of fasteners4)EN 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 specificationEN 3638, Aerospace se
20、ries Heat resisting alloy FE-PA2601 (X6NiCrTiMoV26-15), consumable electrode remelted, solution and precipitation treated Sheet, strip and plate 0,5 mm a 10 mm4)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 MPa4)
21、ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts 3 Required characteristics 3.1 Configuration, dimensions, tolerances, masses See Figure 1 and Table 1. Dimensions and tolerances apply after silver plating. 3.2 Material Nut element: EN 2399, EN 3638 or EN 3639 Cage: EN 363
22、8 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 of the nut. 2) Maximum test temperature of the parts. 3) Published as ASD-prestandard at the date of publication of this standard. 4) Published as
23、ASD-standard. BS EN 3020:20085 3.3 Surface treatment EN 2786, only nut element. Thickness: External surface: 5 m to 15 m; Thread MJ 6: 5 m min. shall be measured at the pitch diameter; Thread MJ 5: shall show complete coverage, without thickness requirement. Dimensions in millimetres Values applicab
24、le before silver plating. Thread surface will be as achieved by normal methods of manufacture. Remove sharp edges 0,1 mm to 0,4 mm Details of form not stated are left to the manufacturers discretion. aRadial float in all lines (see table) bPitch diameter cThread dMarking in these areas eForm out-of-
25、round in this area to achieve the self-locking requirement (tooling marks permissible) fChamfer or radius max. 0,1 gEnlarged Figure 1 Configuration BS EN 3020:20086 Table 1 Dimensions and masses Threada D mm E mm F mm K mm L mm M mm N mm P mm R mm S mm W mm Radial float Z mm Mass1 000pieceskg Code D
26、esignation max. max. max. max. nom. 0/-0,5 min. + 0,2 0 nom. min. 050 MJ5 0,8-4H6H 19 9,5 19 12 25,2 7 6,5 3 2,54 060 MJ6 1-4H5H 22 11 22 13,5 29,2 9 0,6 7,52,4 2,5 4,75 070 MJ7 1-4H5H 26 13 26 16 33,2 10 0,8 8,5 3,2 3,5 3,5 0,5 6,40 aIn accordance with ISO 5855-2. In the self-locking zone, the tole
27、rances apply before forming out-of-round. 4 Designation EXAMPLE Description block Identity block Nut EN 3020 060 Number of EN standard Thread code (see Table 1) If necessary the originator code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424, Style N, as
28、 indicated in Figure 1. 6 Technical specification According to EN 3004. BS EN 3020:2008blankBS EN 3020:2008BSI Group Headquarters389 Chiswick High Road,London W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards Institute (BSI)BSI is the independent national body responsible for preparing
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