1、BRITISH STANDARD AEROSPACE SERIES BS EN 3740:1997 Bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS 2 lubricated Classification: 1100MPa (at ambient temperature)/315 C The European Standard EN 3740:1996 has the status of a British Standard
2、ICS 49.030.20BSEN 3740:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 12-1998 The following BSI references relate to the work on this standard
3、: Committee reference ACE/12 Draft for comment 90/75849 DC ISBN 0 580 27035 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodies were represe
4、nted: Association of Electronics, Telecommunications and Business Equipment Industries British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBSEN 3740:1997 BSI 12-1998 i Contents Page Committe
5、es responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Required characteristics 3 4 Designation 6 5 Marking 6 6 Technical specification 6 7 Oversized bolts 6 Figure 1 Configuration for diameter codes 050 and 060 4 Figure 2 Configuration for diameter co
6、des 080 to 250 4 Table 1 5 List of references Inside back coverBSEN 3740:1997 ii BSI 12-1998 National foreword This British Standard has been prepared by Technical Committee ACE/12 and is the English language version of EN3740:1996 Aerospace series Bolts, shouldered, thin hexagonal head, close toler
7、ance shank, short thread, in titanium alloy, anodized, MoS 2lubricated Classification: 1100 MPa (at ambient temperature)/315C, published by the European Committee for Standardization (CEN). EN 3740:1996 was produced as a result of international discussions in which the United Kingdom took an active
8、part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referr
9、ed to Corresponding British Standard EN 2000:1991 BS EN 2000:1992 Quality assurance EN aerospace products Approval of the quality system of manufacturers EN 2424:1995 BS EN 2424:1995 Marking of aerospace products EN 3042:1991 BS EN 3042:1992 Quality assurance EN aerospace products Qualification proc
10、edure ISO 3353:1992 BS 2A 231:1993 Rolled threads for bolts. Lead and runout requirements ISO 5855-2:1988 BS 6293 Aerospace. MJ threads Part 2:1994 Limit dimensions for bolts and nuts ISO 7913:1994 BS 2A 296:1995 Bolts and screws, metric Tolerances of form and position Summary of pages This document
11、 comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover
12、.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3740 September 1996 ICS 49.040.20 Descriptors: Aircraft industry, hinge pin, titanium alloy, specification, dimension, dimensional tolerance, surface treatment, designation, marking English version Aerospace series Bolts, shouldered, thin hexagon
13、al head, close tolerance shank, short thread, in titanium alloy, anodized, MoS 2 lubricated Classification:1100 MPa (at ambient temperature)/315C Srie arospatiale Axes tte hexagonale basse, tige tolrance serre, filetage court, en alliage de titane, anodiss, Lubrifis MoS 2 Classification:1100 MPa ( t
14、emperature ambiante)/315 C Luft und Raumfahrt Sechskant-Paschrauben, kleiner Kopf, kurzes Gewinde, aus Titanlegierung, anodisiert, MoS 2 geschmiert Klasse: 1100 MPa (beiRaumtemperatur)/315C This European Standard was approved by CEN on 1996-06-29. CEN members are bound to comply with the CEN/CENELEC
15、 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 Central Secretariat or to any CEN
16、member. The European Standards exist 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 Central Secretariat has the same status as the official versions. CEN memb
17、ers are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisch
18、es Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 3740:1996 EEN3740:1996 BSI 12-1998 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and
19、 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 AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national stand
20、ard, either by publication of an identical text or by endorsement, at the latest by March 1997, and conflicting national standards shall be withdrawn at the latest by March 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bo
21、und to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN3740:1996 BSI 12-1998 3 1 Scope This standard specifies the characteristics of
22、 bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS 2lubricated. Classification: 1100 MPa 1)/ 315 C 2) These bolts are intended to be used with washers EN2414 and nuts EN3230. 2 Normative references This European Standard incorporates by dat
23、ed or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard o
24、nly when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO 3353, Aerospace Rolled threads for bolts Lead and runout requirements. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. ISO 7913, A
25、erospace Bolts and screws, metric Tolerances of form and position. ISO 9152, Aerospace Titanium alloy bolts, strength class 1100 MPa, MJ threads Procurement specification 3) . EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers. EN 2414,
26、Aerospace series Washers, chamfered, with counterbore, in alloy steel, cadmium plated 4) . EN 2424, Aerospace series Marking of aerospace products. EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods 5) . EN 3042, Aerospace series Quality assurance EN aerospace products Qu
27、alification procedure. EN 3230, Aerospace series Nuts, hexagon, slotted/castellated, reduced height, normal across flats, in steel, cadmium plated Classification:900MPa (at ambient temperature)/235C 4) . EN 4016, Aerospace series Oversized bolts 4) . TR 3775, Aerospace series Bolts and pins National
28、 materials 6) TR 4070, Aerospace series Molybdenum disulphide dry lubricants List of commercial products 3) . 3 Required characteristics 3.1 Configuration Dimensions Masses SeeFigure 1 andFigure 2 andTable 1. Dimensions and tolerances are expressed in millimetres and apply after anodizing but before
29、 lubricating. 3.2 Tolerances of form and position ISO 7913 3.3 Materials TR 3775 (titanium alloy, strength class 1100 MPa) 3.4 Surface treatment Lubrication: lubricant: see TR 4070; application: EN 2491:5 m to 10 m. 1) Minimum tensile strength of the material at ambient temperature 2) Maximum temper
30、ature that the bolt can withstand without continuous change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the surface treatment. 3) In preparation at the date of publication of this standard 4) Published as AECMA Prestandard at the dat
31、e of publication of this standard 5) Published as AECMA Standard at the date of publication of this standard 6) Published as AECMA Technical Report at the date of publication of this standardEN3740:1996 4 BSI 12-1998 Figure 1 Configuration for diameter codes 050 and 060 Figure 2 Configuration for di
32、ameter codes 080 to 250EN3740:1996 BSI 12-1998 5 Table 1 Diameter code Thread a D 1 D 2 D 3 D 4 D 5 E F J f7 0,5 H13 min. H13 min. nom. Tol. 050 MJ5 0,84h6h 5 3,4 7,4 1,5 8,7 2,5 8 h12 060 MJ6 14h6h 6 4,2 9,4 10,9 10 h13 080 MJ6 14h6h 8 100 MJ8 14h6h 10 6,2 12,3 1,9 14,3 3 13 120 MJ10 1,254h6h 12 7,
33、9 16,3 2,4 18,9 3,5 17 150 MJ12 1,254h6h 15 9,8 8 18,3 21,1 4 19 170 MJ14 1,54h6h 17 11,5 9 21,3 3 24,5 22 200 MJ16 1,54h6h 20 13,5 10 23,3 26,8 5 24 220 MJ18 1,54h6h 22 15,5 11 26,3 3,8 30,2 27 250 MJ20 1,54h6h 25 17,5 12 29,3 33,6 300,3 0 Diameter code L 1 0,2 be L 2 L 3 R 1 R 2 Mass f Code nom. g
34、 h 050 005 to 050 5 to 50 6 9 0,4 1,56 0,09 060 006 to 060 6 to 60 7 10 2,53 0,12 080 007 to 080 7 to 80 0,25 3,31 0,22 100 007 to 080 7 to 80 7,5 11,5 0,4 6,21 0,35 120 007 to 080 7 to 80 9 14,5 11,06 0,50 150 007 to 080 7 to 80 10 16 0,6 0,6 15,52 0,56 170 007 to 080 7 to 80 12 19 22,31 0,73 200 0
35、07 to 080 7 to 80 12,5 20,5 0,9 0,8 32,76 1,05 220 007 to 080 7 to 80 14,5 22,5 43,17 1,27 250 007 to 080 7 to 80 15 24,5 57,13 1,68 a In accordance with ISO 5855-2, except the thread major diameter “d max.” which, for diameter codes 050 and 060, shall be equal to D 1min. 0,025. b Increments: c 1 fo
36、r L 1 30 d 2 for L 1 30 e If greater lengths are required, they shall be chosen using increments of 2 mm. The length code corresponds to the length L 1 , completed by one or two zeros to the left, where necessary, to obtain a three digit code. f Approximate values (kg/1000 pieces), calculated on the
37、 basis of 4,45 kg/dm 3 , given for information purposes only g Value for head and first L 6 h Increase for each additional millimetre of L 6 .0,2 00 +0,2EN3740:1996 6 BSI 12-1998 4 Designation EXAMPLE: NOTEIf necessary, the code 19005 shall be placed between the description block and the identity bl
38、ock. 5 Marking EN 2424, style C plus MJ, indented (seeFigure 2). 6 Technical specification ISO 9152, except for clauses: Approval of manufacturers: see EN 2000; Qualification of bolts: see EN 3042. 7 Oversized bolts EN 4016BSEN 3740:1997 BSI 12-1998 List of references See national foreword.BSI 389 C
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