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1、- - This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 201 - - EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4161 November 2009 ICS 49.030.20 English Version Aerospace series - Screws, pan head, offset cruciform recess, coarse
2、tolerance normal shank, long thread, in alloy steel, cadmium plated - Classification : 1 100 PMa (at ambient temperature) / 235 C Srie arospatiale - Vis tte cylindrique, empreinte cruciforme dporte, tige normale tolrance large, filetage long, en acier alli, cadmies - Classification : 1 100 MPa ( tem
3、prature ambiante) / 235 C Luft- und Raumfahrt - Flachkopfschrauben, mit Flgelkreuzschlitz, langes Gewinde, aus legiertem Stahl, verkadmet - Klasse : 1 100 MPa (bei Raumtemperatur) / 235 C This European Standard was approved by CEN on 15 September 2009. CEN members are bound to comply with the CEN/CE
4、NELEC 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 Management Centre or to a
5、ny 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 the official versions
6、. 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, Slovakia, Slovenia, Spain
7、, 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 exploitation in any form and by any means reserved worldwide for CEN national Mem
8、bers. Ref. No. EN 4161:2009: E - - EN 4161:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Required characteristics .5 3.1 Configuration Dimensions Masses 5 3.2 Tolerances of form and position 5 3.3 Materials .5 3.4 Surface treatment 5 4 Designation 8 5 Marking .8 6 Technica
9、l specification .8 - - EN 4161:2009 (E) 3 Foreword This document (EN 4161:2009) 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 rece
10、ived the approval 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 May 2010,
11、 and conflicting national standards shall be withdrawn at the latest by May 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. Acco
12、rding to 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, Latv
13、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. - - EN 4161:2009 (E) 4 1 Scope This European Standard specifies the characteristics of screws, pan head, offset cruciform recess, coarse tolerance
14、normal shank, long thread, in alloy steel, cadmium plated. Classification: 1 100 MPa1) / 235 C2). 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 latest
15、 edition of the referenced document (including any amendments) applies. EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system manufacturers EN 2133, Aerospace series Cadmium plating of steels with specified tensile strength 1 450 MPa, copper, copper alloys
16、and nickel alloys EN 2137, Aerospace series Steel Fe-PL75 1 100 MPa Rm 1 250 MPa Bars De 100. 5) If greater lengths are required, they shall be chosen using the above increments. The length code corresponds to the length L4, completed by one or two zeros to the left, where necessary, to obtain a thr
17、ee digit code. 6) Approximate values (kg/1 100 pieces), calculated on the basis of 7,85 kg/dm, given for information purposes only. 7) Value for head and first L4. 8) Increase for each additional 2 mm of L4. - - EN 4161:2009 (E) 8 4 Designation EXAMPLE Description block Identity block SCREW EN4161 0
18、50 040 A B Number of this standard Diameter code (see Table 1) Length code (see Table 1) Drive code (see Table 2) Black colour code (see 3.4) NOTE If necessary, the code I9005 may be placed between the description block and the identity block. Table 2 Drive Code ISO 7994 None ISO 7994 unribbed A 5 Marking See Table 3 and Figure 1. Table 3 Diameter code EN 2424 Style 030 and 040 N 050 to 120 B 6 Technical specification ISO 7689, except for clauses: a) Approval of manufacturers: see EN 2000; b) Qualification of screws: see EN 9133. - - - - - - - -