1、BS EN 2879:2017Aerospace series Nuts,anchor, self-locking, airresistant, sealing, floating,two lug, with counterbore,in corrosion resisting steel,passivated, MoS2 lubricated Classification: 900 MPa (atambient temperature) / 235 CBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/
2、2013 15:06BS EN 2879:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 2879:2017. The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems. A list of organizations represented on this commit
3、tee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017. Published by BSI Standards Limited 2017ISBN 978 0 580 92611 2 ICS 49.030
4、.30 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 2879:2017EURO
5、PEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2879 January 2017 ICS 49.030.30 English Version Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated - Classification: 900 MPa (at ambient
6、 temperature) / 235 C Srie arospatiale - crous river, freinage interne, tanches lair, flottants, double patte, avec chambrage, en acier rsistant la corrosion, passivs, lubrifis MoS2 - Classification : 900 MPa ( temprature ambiante) / 235 C Luft- und Raumfahrt - Annietmuttern, selbstsichernd, luftbes
7、tndig, druckdicht, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus korrosionsbestndigem Stahl, passiviert, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 C This European Standard was approved by CEN on 4 March 2016. CEN members are bound to comply with the CEN/CENELE
8、C 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 CEN-CENELEC Management Centre or
9、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-CENELEC Management Centre has the same status as the offic
10、ial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
11、Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rig
12、hts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2879:2017 EBS EN 2879:2017EN 2879:2017 (E) 2 Contents Page European foreword 3 1 Scope 4 2 Normative references 4 3 Required characteristics 5 3.1 Configuration Dimensions Masses . 5 3.2 Toleran
13、ces of form and position . 5 3.3 Materials 5 3.4 Surface treatments . 5 4 Designation . 7 5 Marking . 7 6 Technical specification . 7 BS EN 2879:2017EN 2879:2017 (E) 3 European foreword This document (EN 2879:2017) has been prepared by the Aerospace and Defence Industries Association of Europe - Sta
14、ndardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this European 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 Sta
15、ndard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2017, and conflicting national standards shall be withdrawn at the latest by July 2017. Attention is drawn to the possibility that some of the elements of this
16、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 Standa
17、rd: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Sloven
18、ia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2879:2017EN 2879:2017 (E) 4 1 Scope This European Standard specifies the characteristics of self-locking, air resistant, sealing, floating, two lug anchor nuts, with counterbore, in corrosion resisting steel, passivated, MoS2lubric
19、ated. Classification: 900 MPa 1) / 235 C 2). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of
20、 the referenced document (including any amendments) applies. EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2516, Aerospace series Passivation of corrosion resisting steels and decontamination of nickel base a
21、lloys EN 9100, Quality Management Systems - Requirements for Aviation, Space and Defense Organizations EN 9133, Aerospace series - Quality management systems - Qualification procedure for aerospace standard parts ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 5858,
22、Aerospace Nuts, self-locking, with maximum operating temperature less than or equal to 425 degrees C Procurement specification ISO 8788, Aerospace Nuts, metric Tolerances of form and position ISO 8940, Aerospace Nuts, anchor, self-locking, sealing, floating, two-lug, with counterbore, with MJ thread
23、s, classifications: 900 MPa (at ambient temperature)/120 degrees C, 900 MPa (at ambient temperature)/175 degrees C and 900 MPa (at ambient temperature)/235 degrees C Dimensions SAE AMS 3304G, Silicone Rubber, General Purpose, 70 Durometer 3)TR 3791, Aerospace series Materials for self-locking nuts,
24、threaded inserts and screw thread inserts of temperature classes 425 C 4)1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able
25、 to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the seal material. 3) Published by: SAE National (US) Society of Automotive Engineers http:/www.sae.org/ 4) Published as ASD-STAN Techni
26、cal Report at the date of publication of this European Standard by AeroSpace and Defence industries Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org) BS EN 2879:2017EN 2879:2017 (E) 5 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensi
27、ons and tolerances are: in conformity with ISO 8940, expressed in millimetres and apply after surface treatment but before MoS2lubrication. Details of form not stated are at the manufacturers option. 3.2 Tolerances of form and position ISO 8788 3.3 Materials Cage, seal retainer and nut element: TR 3
28、791. Sealing ring: rubber, air resistant per SAE AMS 3304 or equivalent. 3.4 Surface treatments Cage and seal retainer: EN 2516 Nut element: EN 2491, thickness not specified, mandatory on threads, optional on other surfaces These values in micrometres apply before surface treatment. They do not appl
29、y to threads, punched holes or sheared edges the surface texture of which will be as achieved by usual manufacturing methods. Remove sharp edges 0,1 to 0,4. Ramax 6,3 Ramax 3,2 BS EN 2879:2017EN 2879:2017 (E) 6 Key 1 Threaded element anti-rotational device (form at manufacturers discretion) 2 Markin
30、g 3 2 holes 4 Choice of flange at manufacturers discretion 5 Cage 6 Seal 7 Seal retainer 8 Nut element b9 Form out-of-round in this area to achieve the self-locking requirement (tooling marks permissible) aMaximum bolt thread intrusion bMinimum radial float of nut element: 0,5 cLug thickness at the
31、rivet location Figure 1 BS EN 2879:2017EN 2879:2017 (E) 7 Table 1 Diameter code Thread a E F G H J K L M Q S W Mass b min. min. max. max. max. max. max. + 0,2 0 max. 050 MJ50,8-4H6H 9,5 19 6 3,4 16,2 14,4 24,6 7,9 12,5 2,5 14,4 4,3 060 MJ61-4H5H 11 22 7 4,1 19,2 17 29 9,5 16 17,4 7 080 MJ81-4H5H 13
32、26 9 20,3 19,4 32,5 11,3 18,5 3 18,5 10 aIn accordance with ISO 5855-2. In the self-locking zone the tolerances apply before forming out-of-round. bApproximate values (kg/1 000 pieces), given for information purposes only. 4 Designation EXAMPLE Description block NUT Identity block EN2879-060 Number
33、of this standard 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 N. See Figure 1. 6 Technical specification ISO 5858, except for: Approval of manufacturers: see EN 9100; Qualification of prod
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