1、BRITISH STANDARD AEROSPACE SERIES BS EN 3307:1997 Screws, pan head, offset cruciform recess, threaded to head, in titanium alloy, anodized, MoS 2lubricated Classification: 1100MPa (at ambient temperature)/315 C The European Standard EN 3307:1996 has the status of a British Standard ICS 49.030.20BSEN
2、3307:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authorityof 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: Committee referen
3、ce ACE/12 Draft for comment 92/74427 DC ISBN 0 580 27036 X 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 represented: Association o
4、f 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 CommentsBSEN3307:1997 BSI 12-1998 i Contents Page Committees responsible Insi
5、de 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 Figure 1 4 Table 1 5 Table 2 6 Table 3 6 List of references Inside back coverBSEN3307:1997 ii BSI 12-1998 National foreword This Brit
6、ish Standard has been prepared by Technical Committee ACE/12 and is the English language version of EN 3307:1996 Aerospace series Screws, pan head, offset cruciform recess, threaded to head, in titanium alloy, anodized, MoS 2lubricated Classification: 1100MPa (at ambient temperature)/315 C, publishe
7、d by the European Committee for Standardization (CEN). EN 3307:1996 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respons
8、ible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard EN 2000:1991 BS EN 2000:1992 Quality assurance EN aerospace products Approval of the quality syste
9、m of manufacturers EN 2424:1995 BS EN 2424:1995 Marking of aerospace products 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 screw
10、s, metric Tolerances of form and position ISO 7994:1985 BS A 297:1987 Specification for internal drive, offset cruciform recess (Torq-Set ) for rotary fastening devices. Metric series Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pag
11、es 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3307 September 1996 ICS 49.040.2
12、0 Descriptors: Aircraft industry, screw, cheese head screw, cross recessed screw, titanium alloy, specification, dimension, dimensional tolerance, surface treatment, designation, marking English version Aerospace series Screws, pan head, offset cruciformrecess, threaded to head, in titanium alloy,an
13、odized, MoS 2lubricated Classification: 1100MPa (at ambient temperature)/315 C Srie arospatiale Vis tte cylindrique, empreinte cruciforme dporte, filetes jusqu proximit de la tte, en alliage de titane, anodises, lubrifies MoS 2 Classification: 1100MPa ( temprature ambiante) /315 C Luft-und Raumfahrt
14、 Flachkopfschrauben mit Flgelkreuzschlitz, Gewinde annhernd bis Kopf, aus Titanlegierung, anodisiert, MoS 2 geschmiert Klasse: 1100MPa (beiRaumtemperatur) /315 C This European Standard was approved by CEN on 1996-06-29. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
15、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 member. The European Standar
16、ds 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 members are the national standar
17、ds 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 Europisches Komitee fr Normung Centra
18、l Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 3307:1996 EEN3307:1996 BSI 12-1998 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accord
19、ance 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 standard, either by publication o
20、f an identical text or by endorsement, at the latest by March1997, and conflicting national standards shall be withdrawn at the latest by March1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
21、 Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN3307:1996 BSI 12-1998 3 1 Scope This standard specifies the characteristics of screws, pan head, offset cruc
22、iform recess, threaded to head, in titanium alloy, anodized, MoS 2lubricated. Classification: 1100 MPa 1) /315C 2) 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate plac
23、es 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 only when incorporated in it by amendment or revision. For undated references the latest edition of the publication refer
24、red to applies. ISO 3202, Aerospace Screws, pan head, internal offset cruciform ribbed drive, threaded to head, MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 MPa Dimensions. ISO 3353, Aerospace Rolled threads for bolts Lead and runout requirements. IS
25、O 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. ISO 7913, Aerospace Bolts and screws, metric Tolerances of form and position. ISO 7994, Aerospace Internal drive, offset cruciform recess (Torq-Set ) for rotary fastening devices Metric series. ISO 9152, Aerospace Titanium a
26、lloy bolts, strength class 1100MPa, MJ threads Procurement specification 3) . EN 2000, Aerospace series Quality assurance ENaerospace products Approval of the quality system of manufacturers. EN 2424, Aerospace series Marking of aerospace products. EN 2491, Aerospace series Molybdenum disulphide dry
27、 lubricants Coating methods 4) . TR 3775, Aerospace series Bolts and pins National materials 5) . TR 4070, Aerospace series Molybdenum disulphide dry lubricants List of commercial products 3) . 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and to
28、lerances are: in conformity with ISO3202, expressed in millimetres and apply after anodizing but before lubricating. 3.2 Tolerances of form and position ISO 7913 3.3 Materials TR 3775 (titanium alloy, strength class 1100MPa) 3.4 Surface treatment Lubrication: lubricant: see TR4070; application: EN 2
29、491:5m to 10 m. 1) Minimum tensile strength of the material at ambient temperature 2) Maximum temperature that the screw 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
30、 preparation at the date of publication of this standard 4) Published as AECMA Standard at the date of publication of this standard 5) Published as AECMA Technical Report at the date of publication of this standardEN 3307:1996 4 BSI 12-1998 Figure 1EN 3307:1996 BSI 12-1998 5 Table 1 Diameter code Th
31、read a D 1 D 2 D 3 E L 0,3 bc R S Mass d min. nom. Tol. nom. Tol. Code nom. nom. Tol. max. min. e f 030 MJ30,5 4h6h 6 4,7 2,3 1,8 004 to 042 4 to 42 0,4 1,2 0,3 0,31 0,05 040 MJ40,7 4h6h 8 6,7 3 2,4 006 to 056 6 to 56 1,6 0,4 0,80 0,08 050 MJ50,8 4h6h 10 8,7 3,4 3 008 to 070 8 to 70 0,5 2 0,5 1,58 0
32、,14 060 MJ61 4h6h 12 10,7 4,2 3,6 010 to 084 10 to 84 0,7 2,4 0,6 2,50 0,20 070 MJ71 4h6h 14 12,7 5,2 4,2 010 to 098 10 to 98 2,8 0,7 4,59 0,31 080 MJ81 4h6h 16 14,7 6,2 0,5 4,8 010 to 112 10 to 112 3,2 0,8 5,95 0,44 100 MJ101,25 4h6h 20 18,7 7,9 6 014 to 140 14 to 140 0,8 4 1 10,58 0,59 120 MJ121,2
33、5 4h6h 24 22,7 9,8 7,2 016 to 168 16 to 168 0,9 4,8 1,2 22,54 1 a In accordance with ISO 5855-2 b Increments: 2 for L 100 4 for L 100 c If greater lengths are required, they shall be chosen using the above increments. The length code corresponds to the length L, completed by one or two zeros to the
34、left, where necessary, to obtain a three digit code. d Approximate values (kg/1000 pieces), calculated on the basis of 4,45 kg/dm 3 , given for information purposes only e Value for head and first L f Increase for each additional 2 mm of L 00,3 005 , 002 , 003 , 002 , 003 , EN3307:1996 6 BSI 12-1998
35、 4 Designation EXAMPLE: NOTEIf necessary, the code 19005 shall be placed between the description block and the identity block. Table 2 5 Marking See Table 3 and Figure 1, indented. Table 3 6 Technical specification ISO 9152, except for clauses: Approval of manufacturers: see EN 2000; Qualification o
36、f bolts: not applicable. Drive Code ISO 7994 R ISO 7994 unribbed A Diameter code EN 2424 Style 030 and 040 N 050 to 120 C + MJBSEN3307:1997 BSI 12-1998 List of references See national foreword.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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