1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4443:2012Aerospace series Nuts, elliptical clinch, self-locking, MJ threads, in heat resisting steel FE-PA2601 (A286), MoS2 coated, Classification: 900 MPa (at ambient temp
2、erature)/ 425 CBS EN 4443:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4443:2012. The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems. A list of organizations represented on this c
3、ommittee 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 2012Published by BSI Standards Limited 2012ISBN 978 0 580 75714 3 ICS 49.
4、030.30 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 30 April 2012.Amendments issued since publicationDate Text affectedBS EN 4443:2012EUROPEAN STANDARD NORME
5、EUROPENNE EUROPISCHE NORM EN 4443 March 2012 ICS 49.030.30 English Version Aerospace series - Nuts, elliptical clinch, self-locking, MJ threads, in heat resisting steel FE-PA2601 (A286), MoS2 coated, Classification: 900 MPa (at ambient temperature)/ 425 C Srie arospatiale - crous tte elliptique, fre
6、inage interne, filetage MJ, an acier rsistant chaud FE-PA2601 (A286), revtus MoS2, Classification: 900 MPa ( temprature ambiante)/ 425 C Luft- und Raumfahrt - Einnietmutter, blind, elliptischer Kopf, selbstsichernd, MJ-Gewinde, aus hochwarmfestem Stahl FE-PA2601 (A286), MoS2 beschichtet, Klasse: 900
7、 MPa (bei Raumtemperatur)/ 425 C This European Standard was approved by CEN on 24 September 2011. 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
8、-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. This European Standard exists in three official versions (English, French, German). A version in any other language made by translat
9、ion 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 members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland,
10、France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHE
11、S KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4443:2012: EBS EN 4443:2012EN 4443:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43
12、 Required characteristics .43.1 Configuration Dimensions Tolerances Masses 43.2 Materials .43.3 Surface treatment 44 Designation 85 Marking .86 Technical specification .8BS EN 4443:2012EN 4443:2012 (E) 3 Foreword This document (EN 4443:2012) has been prepared by the Aerospace and Defence Industries
13、Association of Europe - 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.
14、 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 September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that s
15、ome of the elements of this 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 im
16、plement this European Standard: Austria, Belgium, Bulgaria, Croatia, 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,
17、Switzerland, Turkey and the United Kingdom. BS EN 4443:2012EN 4443:2012 (E) 4 1 Scope This European Standard specifies characteristics of self-locking elliptical clinch nuts with MJ threads in FE-PA2601, MoS2coated, for aerospace applications. Classification: 900 MPa 1)/ 425 C 2)2 Normative referenc
18、es 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 the referenced document (including any amendments) applies. EN 2
19、399, Aerospace series Heat resisting steel FE-PA2601 (X4NiCrTiMoV26-15) Rm 900 MPa Bars for forged bolts D 25 mm EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 3639, Aerospace series Heat resisting alloy FE-PA
20、2601 Softened and cold worked Wire for forged fasteners D 15 mm 900 MPa Rm 1 100 MPa EN 4444, Aerospace series Nuts, elliptical clinch, self-locking, in heat resisting steel FE-PA2601 (A286), MoS2 coated Classification: 900 MPa (at ambient temperature)/ 425 C Technical specification 3)ISO 5855-2, Ae
21、rospace MJ threads Part 2: Limit dimensions for bolts and nuts 3 Required characteristics 3.1 Configuration Dimensions Tolerances Masses See figure 1 and tables 1 and 2. Dimensions and tolerances are in millimetres. They apply before MoS2coating. 3.2 Materials EN 2399 or EN 3639 3.3 Surface treatmen
22、t EN 2491 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 test temperature of the parts. 3) Published as ASD-STAN standard at the date of publication of
23、the present standard. BS EN 4443:2012EN 4443:2012 (E) 5 Values apply before MoS2 coating. Thread surface will be as achieved by normal methods of manufacture. Key 1 Form out-of-round in this area to achieve the self-locking requirement (tooling marks permissible). 2 Thread 3 Marking a Tapping marks
24、are accepted in the E1diameter.b 0,01 underhead swelling is accepted over a length less than of diameter D. c Tolerance 02,007,0on diameter D is applicable only on the nominal grip length. Details of form not stated are left to the manufacturers discretion. Figure 1 BS EN 4443:2012EN 4443:2012 (E) 6
25、 Table 1 Dimensions in millimetres Thread aB C D E1H J Code Designation 15,00+min. 15,00+min. 02,007,001,0Ref. Ref. 050 MJ50,8 4H6H 9,25 8,95 7,80 7,55 6,40 5,25 1,50 0,75 060 MJ61 4H5H 11,45 11,15 9,70 9,45 8,00 6,25 1,80 0,90 070 MJ71 4H5H 12,85 12,55 10,90 10,65 9,00 7,25 2,00 1,00 080 MJ81 4H5H
26、14,25 13,95 12,10 11,85 10,00 8,25 2,20 1,10 aIn accordance with ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. BS EN 4443:2012BS EN 4443:2012EN 4443:2012 (E) 7 Table 2 Dimensions in millimetres Grip length Thread code Code nomi-nal 050 060 070 080 Grip lengt
27、h F G Mass aGrip length F G Mass aGrip length F G Mass aGrip length F G Mass amax. min. 0,35 0,20 max. min. 0,35 0,20 max. min. 0,35 0,20 max. min. 0,35 0,20 030 3 3,50 2,00 11,80 5,60 1,20 3,50 2,00 13,80 7,80 2,33 040 4 4,75 3,25 12,80 6,70 1,29 4,75 3,25 15,00 9,00 2,49 4,75 3,25 16,30 9,40 3,28
28、4,75 3,25 18,00 9,80 4,01 050 5 5,75 4,25 13,80 7,70 1,38 5,75 4,25 16,00 10,00 2,65 5,75 4,25 17,30 10,40 3,47 5,75 4,25 19,00 10,80 4,22 060 6 6,75 5,25 14,80 8,70 1,46 6,75 5,25 17,00 11,00 2,82 6,75 5,25 18,30 11,40 3,65 6,75 5,25 20,00 11,80 4,43 070 7 7,75 6,25 15,80 9,70 1,55 7,75 6,25 18,00
29、12,00 2,98 7,75 6,25 19,30 12,40 3,84 7,75 6,25 21,00 12,80 4,64 080 8 8,75 7,25 16,80 10,70 1,64 8,75 7,25 19,00 13,00 3,14 8,75 7,25 20,30 13,40 4,02 8,75 7,25 22,00 13,80 4,85 090 9 9,75 8,25 17,80 11,70 1,73 9,75 8,25 20,00 14,00 3,30 9,75 8,25 21,30 14,40 4,20 9,75 8,25 23,00 14,80 5,06 100 10
30、10,75 9,25 18,80 12,70 1,82 10,75 9,25 21,00 15,00 3,46 10,75 9,25 22,30 15,40 4,39 10,75 9,25 24,00 15,80 5,27 aMas quoted in kg/1 000 parts. BS EN 4443:2012EN 4443:2012 (E) 8 4 Designation EXAMPLE Description blockNUT Identity blockEN 4443 060 080 Number of EN Standard Thread code (See table 1) Gr
31、ip length code (See table 2) NOTE If necessary, the originator code I9005 shall 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 4444 This page deliberately left blankBSI is the independent national bod
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