1、BRITISH STANDARDBS EN 3912:2007Aerospace series Bolts, pan head, six lobe recess, relieved shank, long thread, in heat resisting steel FE-PA2601 (FE-PA92HT, A286), silver plated Classification: 1 100 MPa (at ambient temperature) / 650 CThe European Standard EN 3912:2007 has the status of a British S
2、tandardICS 49.030.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Co
3、py, (c) BSIBS EN 3912:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50642 0National forewordThis British Standard was published by BSI. It is the UK implementation of EN 3912:2007.The UK participatio
4、n 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 provisions of a contract. Users
5、 are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EU
6、ROPENNE EUROPISCHE NORM EN 3912 April 2007 ICS 49.030.20 English Version Aerospace series - Bolts, pan head, six lobe recess, relieved shank, long thread, in heat resisting steel FE-PA2601 (FE-PA92HT, A286), silver plated - Classification: 1 100 MPa (at ambient temperature) / 650 C Srie arospatiale
7、- Vis tte cylindrique, empreinte six lobes, ft dgag, filetage long, en acier rsistant chaud FE-PA2601 (FE-PA92HT, A286), argentes - Classification : 1 100 MPa ( temprature ambiante) / 650 C Luft- und Raumfahrt - Flachkopfschrauben, Sechs-Bogenzahn, Innenantrieb, langes Gewinde, aus hochwarmfestem St
8、ahl FE-PA2601 (FE-PA92HT, A286), versilbert - Klasse: 1 100 MPa (bei Raumtemperatur) / 650 C This European Standard was approved by CEN on 28 August 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the st
9、atus 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 Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German).
10、 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Repub
11、lic, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE
12、NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3912:2007: ELicensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, U
13、ncontrolled Copy, (c) BSI2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.4 4 Designation 8 5 Marking .8 6 Technical specification .8 EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSI3 Foreword This document
14、 (EN 3912:2007) 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 of this Association, this Standard has received the approval of the National Associations and the Official
15、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 or by endorsement, at the latest by October 2007, and conflicting national standards shall be withdrawn at th
16、e latest by October 2007. Attention is drawn to the possibility that some 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 natio
17、nal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, P
18、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies the characteristics of pan head bolts with six lobe recess, reliev
19、ed shank and long thread, in FE-PA2601 (FE-PA92HT), silver plated, for aerospace applications. Classification: 1 100 MPa 1)/ 650 C 2)NOTE Taking account of the recess geometry, the strength class to be used for the seating torque calculation shall not be greater than 900 MPa. 2 Normative references
20、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. ISO 3353-1, Aerospace Lead and runout threads Par
21、t 1: Rolled external threads. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. EN 2399, Heat resisting steel FE-PA92-HT Rm 900 MPa Bars for forged bolts D 25 mm Aerospace series. 3)EN 2424, Aerospace series Marking of aerospace products. EN 2786, Aerospace series Electro
22、lytic silver plating of fasteners. 4)EN 3685, Aerospace series Bolts in heat resisting steel, FE-PA92HT (A286) Classification: 1 100 MPa/650 C Technical specification. 4)EN 3761, Aerospace series Heat resisting alloy FE-PA2601 Softened and cold worked Bar for forged fasteners D 50 mm 1 100 MPa Rm 1
23、300 MPa. 4)EN 3905, Aerospace series Six lobe recesses for bolts Technical specification. 4)EN 3911, Aerospace series Six lobe recess Geometrical definition. 4)3 Required characteristics 3.1 Configuration - Dimensions - Tolerances See Figure 1 and Tables 1 and 2. Dimensions and tolerances are in mil
24、limetres. They apply after silver plating. 1) Minimum tensile strength of the material at ambient temperature. 2) Maximum test temperature of the parts. 3) Published as ASD Standard at the date of publication of this standard. 4) Published as ASD Prestandard at the date of publication of this standa
25、rd. EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSI5 3.2 Materials EN 3761 or EN 2399 with exception of final heat treatment which shall meet EN 3761 (reference heat treatment and relating mechanical properties). 3.3 Surface treatment EN 2786 T
26、hickness : thread : 3 m to 6 m shall be measured at the pitch diameter ; other areas shall show complete coverage, without thickness requirement. Values apply before silver plating.Remove sharp edges 0,1 to 0,4. Key 1 Recess in conformity with EN 3911 5 0 to 5 2 Marking 6 Pitch 3 Conform to ISO 3353
27、-1 7 Thread 4 Shape in this area at manufacturers option aRolled bWhen the length of the shank is less than one times the nominal value of the shank diameter D, the run-out is measured at a distance equal to half the actual shank length. CFor bolts having a shank length less than one times the nomin
28、al value of the shank diameter D, and for those threaded to head, the pitch diameter axis shall be used as the datum. Figure 1 3,2, 0,8 0,8 0,8 a EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSI6 Table 1 Thread a D E F G H K Q R X Y Z Code Desig
29、nation 0,13 max. min. min. 0 + 0,2h15 0,5 max. min. Recess code b 050 MJ50,8-4h6h 4,48 8,5 8,1 0,7 1,8 4 3,5 0,5 0,3 0,18 EN3911-27 060 MJ61-4h6h 5,35 10 9,5 2,25 4,7 4,2 0,12 0,21 EN3911-30 070 MJ71-4h6h 6,35 12 11,4 1 2,5 5,4 5,2 0,25 EN3911-40 080 MJ81-4h6h 7,35 13 12,4 1,5 2,7 6 6,2 0,7 0,5 0,00
30、30,15 0,28 EN3911-45 aIn accordance with ISO 5855-2. bSee EN 3911. Table 2 Thread code 050 060 070 080 W Mass a W Mass aW Mass aW Mass aLength code N 0,3 max. min. max. min. max. min. max. min. 008 8 2,71 010 10 2,85 4,96 7,95 10,59 012 12 3,20 5,31 8,45 11,26 014 14 3,45 5,66 8,94 11,93 016 16 3,69
31、 6,03 9,45 12,58 018 18 2,11,73,92 6,39 9,94 13,25 020 20 4 2,5 4,13 2,72,26,74 10,43 13,92 022 22 6 4,5 4,27 4 2,5 7,07 2,7 2,2 10,93 14,59 024 24 8 6,5 4,41 6 4,5 7,25 4 2,5 11,40 2,72,215,26 026 26 10 8,5 4,55 8 6,5 7,44 6 4,5 11,72 4 2,5 15,91 028 28 12 10,5 4,68 10 8,5 7,64 8 6,5 12,04 6 4,5 16
32、,35 030 30 14 12,5 4,82 12 10,5 7,83 10 8,5 12,33 8 6,5 16,79 032 32 16 14,5 4,96 14 12,5 8,02 12 10,5 12,65 10 8,5 17,23 034 34 18 16,5 5,12 16 14,5 8,20 14 12,5 12,97 12 10,5 17,69 036 36 20 18,5 5,26 18 16,5 8,39 16 14,5 13,27 14 12,5 18,14 038 38 22 20,5 5,38 20 18,5 8,59 18 16,5 13,59 16 14,5 1
33、8,58 040 40 24 22,5 5,52 22 20,5 8,78 20 18,5 13,90 18 16,5 19,02 042 42 26 24,5 5,66 24 22,5 8,97 22 20,5 14,20 20 18,5 19,46 044 44 28 26,5 5,80 26 24,5 9,15 24 22,5 14,52 22 20,5 19,92 046 46 30 28,5 5,95 28 26,5 9,34 26 24,5 14,83 24 22,5 20,38 048 48 32 30,5 6,07 30 28,5 9,54 28 26,5 15,15 26 2
34、4,5 20,82 050 50 34 32,5 6,21 32 30,5 9,75 30 28,5 15,45 28 26,5 21,26 continued EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSI7 Table 2 (concluded) Thread code 050 060 070 080 W Mass a W Mass aW Mass aW Mass aLength code N 0,3 max. min. max.
35、min. max. min. max. min. 052 52 36 34,5 6,35 34 32,5 9,94 32 30,5 15,77 30 28,5 21,70 054 54 38 36,5 6,49 36 34,5 10,12 34 32,5 16,08 32 30,5 22,16 056 56 40 38,5 6,63 38 36,5 10,31 36 34,5 16,38 34 32,5 22,61 058 58 42 40,5 6,76 40 38,5 10,50 38 36,5 16,70 36 34,5 23,05 060 60 44 42,5 6,90 42 40,5
36、10,70 40 38,5 17,02 38 36,5 23,49 062 62 46 44,5 7,04 44 42,5 10,89 42 40,5 17,32 40 38,5 23,93 064 64 48 46,5 7,18 46 44,5 11,07 44 42,5 17,63 42 40,5 24,41 066 66 50 48,5 7,32 48 46,5 11,26 46 44,5 17,95 44 42,5 24,85 068 68 52 50,5 7,44 50 48,5 11,45 48 46,5 18,27 46 44,5 25,29 070 70 54 52,5 7,6
37、2 52 50,5 11,65 50 48,5 18,58 48 46,5 25,73 072 72 54 52,5 11,86 52 50,5 18,87 50 48,5 26,19 074 74 56 54,5 12,04 54 52,5 19,18 52 50,5 26,64 076 76 58 56,5 12,23 56 54,5 19,50 54 52,5 27,08 078 78 60 58,5 12,42 58 56,5 19,81 56 54,5 27,52 080 80 62 60,5 12,62 60 58,5 20,11 58 56,5 27,98 082 82 64 6
38、2,5 12,81 62 60,5 20,43 60 58,5 28,33 084 84 66 64,5 12,99 64 62,5 20,75 62 60,5 28,88 086 86 66 64,5 21,05 64 62,5 29,34 088 88 68 66,5 21,36 66 64,5 29,76 090 90 70 68,5 21,68 68 66,5 30,22 092 92 72 70,5 21,98 70 68,5 30,66 094 94 74 72,5 22,23 72 70,5 31,11 096 96 76 74,5 22,61 74 72,5 31,55 098
39、 98 78 76,5 22,93 76 74,5 31,99 100 100 78 76,5 32,45 104 104 82 80,5 33,35 108 108 86 84,5 34,23 112 112 90 88,5 35,13 aMass quoted in kg/1 000 parts. EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSI8 4 Designation EXAMPLE Description block BOL
40、T Identity block EN3912-080060 Number of this standard Thread code (see Table 1) Length code (see Table 2) NOTE If necessary, the 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 3685 a
41、nd EN 3905 EN 3912:2007Licensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSIblankLicensed Copy: Wang Bin, na, Wed Aug 15 07:53:04 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 3912:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI i
42、s the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure
43、 that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsibl
44、e, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.Buying standardsOrders for all BSI,
45、international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-.In response to orders for international standards, it is BSI policy to
46、 supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Variou
47、s BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-.Subscribing members of BSI are kept up to date with standards developments and receive sub
48、stantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-.Information regarding online access to British Standards via British Standards Online can be fou
49、nd at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced,
