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 49.030.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3912:2007This British Standard was published under the authority of the St
3、andards 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 participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and f
4、astening 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 are responsible for its correct application.Compliance with a British Standard cannot conf
5、er immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE 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-
6、PA2601 (FE-PA92HT, A286), silver plated - Classification: 1 100 MPa (at ambient temperature) / 650 C Srie arospatiale - 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)
7、/ 650 C Luft- und Raumfahrt - Flachkopfschrauben, Sechs-Bogenzahn, Innenantrieb, langes Gewinde, aus hochwarmfestem Stahl 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 co
8、mply 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 Manag
9、ement 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 Management Centre has the same status as t
10、he 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slova
11、kia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE 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 worldwid
12、e for CEN national Members. Ref. No. EN 3912:2007: E2 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 3912:20073 Foreword This document (EN 3912:2007) has been prepared by the Aerospace and Defence I
13、ndustries 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 presentati
14、on 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 the latest by October 2007. Attention is drawn to the possibility
15、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 national standards organizations of the following countries are bound
16、 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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swi
17、tzerland and the United Kingdom. EN 3912:20074 1 Scope This standard specifies the characteristics of pan head bolts with six lobe recess, relieved 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
18、 the recess geometry, the strength class to be used for the seating torque calculation shall not be greater than 900 MPa. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undate
19、d references, the latest edition of the referenced document (including any amendments) applies. ISO 3353-1, Aerospace Lead and runout threads Part 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
20、 MPa Bars for forged bolts D 25 mm Aerospace series. 3)EN 2424, Aerospace series Marking of aerospace products. EN 2786, Aerospace series Electrolytic silver plating of fasteners. 4)EN 3685, Aerospace series Bolts in heat resisting steel, FE-PA92HT (A286) Classification: 1 100 MPa/650 C Technical sp
21、ecification. 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 1 300 MPa. 4)EN 3905, Aerospace series Six lobe recesses for bolts Technical specification. 4)EN 3911, Aerospace series Six lobe recess Geometrical definitio
22、n. 4)3 Required characteristics 3.1 Configuration - Dimensions - Tolerances See Figure 1 and Tables 1 and 2. Dimensions and tolerances are in millimetres. They apply after silver plating. 1) Minimum tensile strength of the material at ambient temperature. 2) Maximum test temperature of the parts. 3)
23、 Published as ASD Standard at the date of publication of this standard. 4) Published as ASD Prestandard at the date of publication of this standard. EN 3912:20075 3.2 Materials EN 3761 or EN 2399 with exception of final heat treatment which shall meet EN 3761 (reference heat treatment and relating m
24、echanical properties). 3.3 Surface treatment EN 2786 Thickness : 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
25、 3911 5 0 to 5 2 Marking 6 Pitch 3 Conform to ISO 3353-1 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 bol
26、ts having a shank length less than one times the nominal 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 3912:20076 Table 1 Thread a D E F G H K Q R X Y Z Code Designation 0,13 max. min. min. 0 + 0,2h15
27、 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 0,0030,15 0,28 EN3911-45 aIn accordance w
28、ith 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 6,03 9,45 12,58 018 18 2,11,73,92 6,
29、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 16,35 030 30 14 12,5 4,82 12 10,5 7,83
30、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 18,58 040 40 24 22,5 5,52 22 20,5 8,78
31、 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 24,5 20,82 050 50 34 32,5 6,21 32 30,5
32、 9,75 30 28,5 15,45 28 26,5 21,26 continued EN 3912:20077 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. 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
33、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 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 11,0
34、7 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 7,62 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
35、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 62,5 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
36、 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 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 qu
37、oted in kg/1 000 parts. EN 3912:20078 4 Designation EXAMPLE Description block BOLT 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 Markin
38、g EN 2424, style A, as indicated on Figure 1. 6 Technical specification EN 3685 and EN 3905 EN 3912:2007blankBS EN 3912:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view
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