1、BS EN 4074:2009ICS 49.030.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Screws, pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in titanium alloy, aluminium IVD coated Classification: 1 100MPa (at ambient temp
2、erature) / 425 nullCThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 July 2009 BSI 2009ISBN 978 0 580 68667 2Amendments/corrigenda issued since publicationDate CommentsBS EN 4074:2009National forewordThis British Standard is the UK implementati
3、on of EN 4074:2009.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the neces
4、sary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 4074:2009EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4074 July 2009 ICS 49.030.20 English Version Aerospace series - Screws,
5、pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in titanium alloy, aluminium IVD coated - Classification: 1 100 MPa (at ambient temperature) / 425 C Srie arospatiale - Vis tte cylindrique, empreinte six lobes, tige normale tolrance large, filetage moyen, en alliage de
6、 titane, revtues daluminium IVD - Classification: 490 MPa ( temprature ambiante) / 425 C Luft- und Raumfahrt - Flachkopfschrauben mit Sechs-Bogenzahn, mit mittlerer Gewindelnge, aus Titanlegierung, Aluminium IVD beschichtet - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 C This European Standard was
7、approved by CEN on 6 June 2009. 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-date lists and bibliographical references concerning such nationa
8、l 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). A version in any other language made by translation under the responsibility of a CEN member into its own language and not
9、ified 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 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, M
10、alta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of ex
11、ploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4074:2009: EBS EN 4074:2009EN 4074:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Required characteristics .5 4 Designation 8 5 Marking .8 6 Technical specification .8 BS EN 407
12、4:2009EN 4074:2009 (E) 3 Foreword This document (EN 4074:2009) 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
13、 of the National Associations and the Official 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 January 2010, and conflict
14、ing national standards shall be withdrawn at the latest by January 2010. 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
15、the CEN/CENELEC Internal Regulations, the national 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, Lithu
16、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 4074:2009EN 4074:2009 (E) 4 1 Scope This standard specifies the characteristics of screws, pan head, six lobe recess, coarse tolerance normal shank, m
17、edium length thread, in titanium alloy, aluminium IVD coated. Classification: 1 100 MPa 1) / 425 C 2)2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the lat
18、est edition of the referenced document (including any amendments) applies. EN 2424, Aerospace series Marking of aerospace products. EN 3911, Aerospace series Six lobe recess Geometrical definition. 3)EN 9100, Aerospace series Quality management systems Requirements (based on ISO 9001:2000) and Quali
19、ty systems Model for quality assurance in design, development, production, installation and servicing (based on ISO 9001:1994). EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts. ISO 3353-1, Aerospace Lead and runout threads Part 1: Rolled exte
20、rnal threads. ISO 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 9152, Aerospace Bolts, with MJ threads, in titanium alloys, strength class 1 100 MPa Procurement specification. TR 3775, Aeros
21、pace series Bolts and pins Materials. 4) MIL-DTL-83488D, Coating, aluminum, high purity. 5)NAS 1800-90, Recess, six lobe drive Internal Dimensions for recess and gages. 6) 1) Minimum tensile strength of the material at ambient temperature. 2) Maximum temperature that the screw can withstand without
22、continuous change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the surface treatment. 3) Published as ASD Prestandard at the date of publication of this standard. 4) Published as ASD Technical Report at the date of publication of this
23、 standard. 5) Published by: Department of Defense (DoD), the Pentagon, Washington,DC 20301, USA. 6) Published by: Aerospace Industries Association of America, Inc. (AIA), 1250 Eye Street, NW; Suite 1100, Washington, DC 20005, USA. BS EN 4074:2009EN 4074:2009 (E) 5 3 Required characteristics 3.1 Conf
24、iguration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. 3.2 Tolerances of form and position ISO 7913 and those specified in Figure 1 and Table 1. 3.3 Materials TR 3775 (titanium alloy, classification 1 100 MPa).
25、3.4 Surface treatment MIL-DTL-83488D, Type II, class 3, 4 m to 12 m. After aluminium deposit: a) mechanical blasting, followed by a chromate conversion coating within 24 h max. 7); b) optional lubrication with cethylic alcohol (code E). 7) Products used shall be in conformity with national regulatio
26、n into force. BS EN 4074:2009EN 4074:2009 (E) 6 Values in micrometres apply prior to surface treatment. Break sharp edges 0,1 to 0,4. Key 1 1 hole D7 optional 2 Pitch diameter 3 Thread 4 Conforms to ISO 3353-1 5 Marking 6 Two holes D5 optional 7 Three holes D5 optional 8 Radius or chamfer Figure 1 3
27、,2 1,6 0,8 Configuration for diameter codes 030 and 040Configuration for diameter codes 050 to 200 BS EN 4074:2009EN 4074:2009 (E) 7 Table 1 Diameter code Thread aD1D2D3D4D5D6D7E G H h12 h13 nom. Tol. min. H13 max. H13 nom. Tol. nom. Tol. 030 MJ30,5 - 4h6h 3 5,5 2,3 0 0,5 5,07 1 3,4 1,5 0 0,2 0,3 3
28、h13 040 MJ40,7 - 4h6h 4 7 3 6,53 3,9 1,1 2 0,4 4 050 MJ50,8 - 4h6h 5 8,5 3,4 0,5 8,03 5,1 1,5 2,5 0,5 5 060 MJ61 - 4h6h 6 10 4,2 9,38 1,4 6,3 3 0 0,3 0,6 6 h14080 MJ81 - 4h6h 8 13 6,2 12,33 7,5 1,9 4 0,8 8 100 MJ101,25 - 4h6h 10 16 7,9 15,331,6 10,2 2,4 5 0 0,5 1 10 120 MJ121,25 - 4h6h 12 18 9,8 17,
29、23 13,8 6 1,2 12 Diameter code K L1 0,2b, cL2L3R W Recess Mass d 0,1 Length code nom. max. min. EN 3911 code NAS 1800 number ef030 0,9 002 to 030 2 to 30 7,5 0,4 0,2 T10 0,59 0,031 040 1,4 002 to 040 2 to 40 10 6 0,22 25 1,28 0,056 050 1,6 003 to 050 3 to 50 12 7,5 0,5 0,3 27 2,58 0,087 060 2 003 to
30、 060 3 to 60 14 8,5 0,7 0,5 T30 3,94 0,126 080 2,4004 to 080 4 to 80 16,5 10,5 0,2745 8,75 0,224 100 005 to 100 5 to 100 20,5 13 0,8 0,6 T50 16,61 0,349 120 006 to 120 6 to 120 22,5 14,5 0,9 T55 24,43 0,503 aIn accordance with ISO 5855-2. bIncrements: - 1 for L1 30; - 2 for 30 100. cIf greater lengt
31、hs are required, they shall be chosen using the above increments. The length code corresponds to the length L1, completed by one or two zeros to the left, where necessary, to obtain a three digit code. dApproximate values (kg/1 000 pieces), calculated on the basis of 4,45 kg/dm3, given for informati
32、on purposes only. They apply to screws without holes. e Value for head and first L4.f Increase for each additional millimetre of L4. BS EN 4074:2009EN 4074:2009 (E) 8 4 Designation EXAMPLE Description block SCREW Identity block EN4074H050040E Number of this standard Hole code (see Table 2) Diameter
33、code (see Table 1) Length code (see Table 1) Lubrication code (see 3.4) NOTE If necessary the originator code I9005 should be placed between the description block and the identity block. Table 2 Holes Code Lockwire H Split pin D Lockwire and split pin C No hole (hyphen) 5 Marking See Table 3 and Fig
34、ure 1. Table 3 Diameter code EN 2424 Style 030 and 040 N 050 to 120 B 6 Technical specification ISO 9152, except for clauses: a) Approval of manufacturers: see EN 9100; b) Qualification of bolts: see EN 9133. BS EN 4074:2009This page has been intentionally left blankBS EN4074:2009BSI GroupHeadquarte
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