1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/235 CBS EN 2
2、878:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2878 September 2018 ICS 49.030.30 SupersedesEnglish Version Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 M
3、Pa (at ambient temperature)/235 C Srie arospatiale - crous river, freinage interne, tanches lair, flottants, double patte, avec chambrage, en acier alli, cadmis, lubrifis MoS2 - Classification: 900 MPa ( temprature ambiante)/235 C Luft- und Raumfahrt - Annietmuttern, selbstsichernd, druckdicht, luft
4、bestndig, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 C This European Standard was approved by CEN on 11 June 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulation
5、s 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 to any CEN member. Th
6、is 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 official versions. CEN mem
7、bers 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, Norway, Poland, Portu
8、gal, 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: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitati
9、on in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2878:2018 ENational forewordThis British Standard is the UK implementation of EN 2878:2018.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening s
10、ystems.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 contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI
11、 Standards Limited 2018ISBN 978 0 580 99913 0ICS 49.030.30Compliance 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 30 September 2018.Amendments/corrigenda issued since p
12、ublicationDate Text affectedBRITISH STANDARDBS EN 2878:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2878 September 2018 ICS 49.030.30 SupersedesEnglish Version Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadm
13、ium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/235 C Srie arospatiale - crous river, freinage interne, tanches lair, flottants, double patte, avec chambrage, en acier alli, cadmis, lubrifis MoS2 - Classification: 900 MPa ( temprature ambiante)/235 C Luft- und Raumfahr
14、t - Annietmuttern, selbstsichernd, druckdicht, luftbestndig, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 C This European Standard was approved by CEN on 11 June 2018. CEN members are bound
15、 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 bibliographical references concerning such national standards may be obtained on application to the CEN
16、-CENELEC 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre ha
17、s the same status as the official 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, Lu
18、xembourg, Malta, Netherlands, 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: Rue de la Science 23
19、, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2878:2018 EBS EN 2878:2018EN 2878:2018 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Required characteristics 5 4 Designation 8
20、 5 Marking . 8 6 Technical specification 8 BS EN 2878:2018EN 2878:2018 (E) 3 European foreword This document (EN 2878:2018) 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
21、 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, either by publication of an identical text o
22、r by endorsement, at the latest by March 2019, and conflicting national standards shall be withdrawn at the latest by March 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying an
23、y or all such patent rights. This document supersedes EN 2878:1998. 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, Croatia, Cyprus, Czech Republic, Denmark,
24、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, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2878:
25、2018EN 2878:2018 (E) 4 1 Scope This European standard specifies the characteristics of self-locking, air resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2lubricated. Classification: 900 MPa1)/235 C2). 2 Normative references The following docume
26、nts are referred to in the text in such a way that some or all of their content constitutes requirements 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 2133, Aerospac
27、e series Cadmium plating of steels, with maximum specified tensile strength equal to or less than 1 450 MPa, copper, copper alloys and nickel alloys3)EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 9100, Qualit
28、y Management Systems Requirements for Aviation, Space and Defence Organizations EN 9133, Aerospace series Quality Management Systems Qualification Procedure for Aerospace Standard Products ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 5858, Aerospace Nuts, self-loc
29、king, with maximum operating temperature less than or equal to 425 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 threads, classifications 900 MPa (at a
30、mbient temperature)/120 C, 900 MPa (at ambient temperature)/175 C and 900 MPa (at ambient temperature)/235 C Dimensions AMS 3304G, Silicone Rubber, General Purpose, 70 Durometer4)TR 3791, Aerospace series Materials for self-locking nuts, threaded inserts and screw thread inserts of temperature class
31、es 425 C5)1) Corresponds to strength class of the associated bolt, the 100 per cent load of which it is able to withstand, when tested at ambient temperature, without breaking or cracking. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characte
32、ristics, after ambient temperature has been restored. The maximum temperature is conditioned by the material. 3) Published as ASD-STAN Standard at the date of publication of this European standard (www.asd-stan.org). 4) Published by: Society of Automotive Engineers, Inc. (SAE), 400 Commonwealth Driv
33、e, Warrendale, PA 15096-0001, USA. 5) Published as ASD-STAN Technical Report at the date of publication of this standard (www.asd-stan.org). BS EN 2878:2018EN 2878:2018 (E) 5 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are: in co
34、nformity with ISO 8940, expressed in millimetres and apply after cadmium plating 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 3791. Sealing ring: rubber, air
35、 resistant per AMS 3304 or equivalent. 3.4 Surface treatments Cage and seal retainer: EN 2133, 5 m min. on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present. Nut element: EN 2133, 5 m min. on all surfaces which can be contacted
36、 by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present; EN 2491, thickness not specified, mandatory on threads, optional on other surfaces. BS EN 2878:2018EN 2878:2018 (E) 6 Remove sharp edges 0,1 to 0,4. Key 1)These values in micrometres apply before surface treatme
37、nt. They do not apply to threads, punched holes or sheared edges the surface texture of which will be as achieved by usual manufacturing methods. 2)Maximum bolt thread intrusion. 3)Minimum radial float of nut element: 0,5. 4)Lug thickness at the rivet location. Figure 1 BS EN 2878:2018EN2878:2018(E)
38、7Table1DiametercodeThreadaEFGHJKLMQSWMassbmin.min.max.max.max.max.max.+0,20max.050MJ5null0,84H6H9,51963,416,214,424,67,912,562,514,44,3060MJ6null14H5H112274,119,217299,51617,47080MJ8null14H5H1326920,319,432,511,318,5318,510aInaccordancewithISO5855-2.Intheself-lockingzonethetolerancesapplybeforeformi
39、ngout-of-round.bApproximatevalues(kg/1000pieces),givenforinformation purposesonly.BS EN 2878:2018EN 2878:2018 (E) 8 4 Designation EXAMPLE 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 spec
40、ification ISO 5858, except for: approval of manufacturers: see EN 9100; qualification of products: see EN 9133. BS EN 2878:2018This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publicatio
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