1、BSI Standards PublicationBS EN 4073:2016Aerospace series Screws,pan head, hexalobular recess,coarse tolerance shank,medium length thread, inalloy steel, cadmium plated Classification: 1 100 MPa (atambient temperature) / 235 CBS EN 4073:2016 BRITISH STANDARDNational forewordThis British Standard is t
2、he UK implementation of EN 4073:2016.It supersedes BS EN 4073:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations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 beobtained on request to its s
3、ecretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 90478 3ICS 49.030.20Compliance with a British Standard canno
4、t confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 4073:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
5、 4073 March 2016 ICS 49.030.20 Supersedes EN 4073:2009English Version Aerospace series - Screws, pan head, hexalobular recess, coarse tolerance shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature) / 235 C Srie arospatiale - Vis tte cylindri
6、que, empreinte six lobes, tige tolrance large, filetage moyen, en acier alli, cadmies - Classification: 1 100 MPa ( temprature ambiente) / 235 C Luft- und Raumfahrt - Flachkopfschrauben, mit Innensechsrund, mit mittlerer Gewindelnge, aus legiertem Stahl, verkadmet - Klasse: 1 100 MPa (bei Raumtemper
7、atur) / 235 C This European Standard was approved by CEN on 22 August 2015. 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 biblio
8、graphical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 responsi
9、bility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republ
10、ic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALIS
11、ATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4073:2016 EBS EN 4073:2016EN 4073:2016 (E) 2 Contents Page European foreword
12、 . 3 1 Scope 4 2 Normative references 4 3 Required characteristics 5 4 Designation 8 5 Marking . 8 6 Technical specification 8 Annex A (normative) Standard evolution form. 9 BS EN 4073:2016EN 4073:2016 (E) 3 European foreword This document (EN 4073:2016) has been prepared by the Aerospace and Defenc
13、e Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this European Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to it
14、s 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 September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to
15、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. This document supersedes EN 4073:2009. According to the CEN-CENELEC Internal Regulations, the national stand
16、ards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu
17、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4073:2016EN 4073:2016 (E) 4 1 Scope This European Standard specifies the characteristics of screws, pan head, six lobe recess, coarse tolerance shank,
18、 medium length thread, in alloy steel, cadmium plated. Classification: 1 100 MPa 1)/ 235 C 2). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited appl
19、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2133, Aerospace series Cadmium plating of steels with specified tensile strength 1450 MPa, copper, copper alloys and nickel alloys EN 2424, Aerospace series Marking of aerospace products
20、 EN 3911, Aerospace series Six lobe recess Geometrical definition EN 9100, Quality Management Systems Requirements for Aviation, Space and Defense Organizations EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts ISO 3353-1, Aerospace Lead and ru
21、nout threads Part 1: Rolled external threads ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 7689, Aerospace Bolts, with MJ threads, made of alloy steel, strength class 1 100 MPa Procurement specification ISO 7913, Aerospace Bolts and screws, metric Tolerances of for
22、m and position TR 3775, Aerospace series Bolts and pins Materials 3)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 temp
23、erature is determined by the surface treatment. 3) Published as ASD-STAN Technical Report at the date of publication of this European Standard (http:/www.asd-stan.org/). BS EN 4073:2016EN 4073:2016 (E) 5 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensi
24、ons 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: alloy steel, classification 1 100 MPa 3.4 Surface treatment EN 2133, thickness 8 m to 14 m, on all surfa
25、ces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present, but no value is specified. Black colour option: code B. BS EN 4073:2016EN 4073:2016 (E) 6 Dimensions in millimetres Key 1 Thread 2 Marking 3 Conforms to ISO 3353-1 4 Radius or chamfer 5
26、 Two holes optional (see Table 2) for diameter codes 030 and 040 6 Three holes optional (see Table 2) for diameter codes 050 to 120 7 L4= L1 + (L2) Figure 1 BS EN 4073:2016EN 4073:2016 (E) 7 Table 1 Diameter code Thread aD1D2D3D4D5D6D7E G h12 h13 nom. Tol. min. H13 max. H13 nom. Tol. 030 MJ3x0,5 - 4
27、h6h 3 5,5 2,3 0 0,5 5,07 1,0 3,4 1,5 + 0,2 0 0,3 040 MJ4x0,7 - 4h6h 4 7,0 3,0 6,53 5,2 1,1 2,0 0,4 050 MJ5x0,8 - 4h6h 5 8,5 3,4 0,5 8,03 5,8 1,5 2,5 0,5 060 MJ6x1 - 4h6h 6 10,0 4,2 9,38 1,4 6,3 3,0 + 0,3 0 0,6 080 MJ8x1 - 4h6h 8 13,0 6,2 12,33 8,9 1,9 4,0 0,8 100 MJ10x1,25 - 4h6h 10 16,0 7,9 15,33 1
28、,6 10,2 2,4 5,0 + 0,5 0 1,0 120 MJ12x1,25 - 4h6h 12 18,0 9,8 17,23 13,8 6,0 1,2 Diameter code H K L1 0,2 b,cL2L3R W Recess Mass dnom Tol. 0,1 Length code nom. max. min. EN 3911 code e f 030 3 h13 0,9 002 to 030 2 to 30 7,5 0,4 0,2 10 1,04 0,055 040 4 1,4 002 to 040 2 to 40 10,0 6,0 0,22 25 2,26 0,10
29、0 050 5 1,6 003 to 050 3 to 50 12,0 7,5 0,5 0,3 27 4,55 0,153 060 6 h14 2,0 003 to 060 3 to 60 14,0 8,5 0,7 0,5 30 6,95 0,222 080 8 2,4 004 to 080 4 to 80 16,5 10,5 0,22 45 15,44 0,395 100 10 005 to 100 5 to100 20,5 13,0 0,8 0,6 50 29,30 0,616 120 12 006 to 120 6 to120 22,5 14,5 0,9 55 43,10 0,887 a
30、In accordance with ISO 5855-2. bIncrements: 1 for L1 30; 2 for 30 100.cIf greater lengths 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
31、 values (kg/1 000 pieces), calculated on the basis of 7,85 kg/dm3, given for information purposes only. They apply to screws without holes.eValue for head and first L4.fIncrease for each additional millimetre of L4.BS EN 4073:2016EN 4073:2016 (E) 8 4 Designation EXAMPLE Description block SCREW Ident
32、ity block EN4073H050040B Number of this standard Hole code (see Table 2) Diameter code (see Table 1) Length code (see Table 1) Black colour code (see 3.4) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. Table 2 Holes Code Lockwire H Split pin D
33、 Lockwire and split pin C No hole (hyphen) 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 6.1 General ISO 7689, with the following modifications. 6.2 Approval of manufacturers EN 9100. 6.3 Qualification of bolts EN 9133. B
34、S EN 4073:2016EN 4073:2016 (E) 9 Annex A (normative) Standard evolution form MODIFICATION REASON AND VALIDATION Current D6 dimensions for diameter codes 40, 50 and 80 are not achievable. Addition in normative references: EN 3911, Aerospace series Six lobe recess Geometrical definition There was no s
35、tandard for six lobe definition. L4is not defined and has no tolerance values. Keys 5 and 6 are none written on the drawing and linked with diameter range. Roughness symbol inside and above the drawing Add to all symbols: max. Modify symbols according to ISO 1302. e.g. Ra max. 3,2 Ra max. 0,8 Replac
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