1、BS EN 4178:2017Aerospace series Screws,pan head, six lobe recess,coarse tolerance normal shank,medium length thread, intitanium alloy, anodized, MoS2lubricated Classification:1 100 MPa (at ambienttemperature) / 315 CBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS
2、EN 4178:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4178:2017.It supersedes BS EN 4178:2009 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems.A list of organ
3、izations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 201
4、7ISBN 978 0 580 92602 0 ICS 49.030.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2017.Amendments/corrigenda issued since publicationDate T e x t
5、a f f e c t e dBS EN 4178:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4178 January 2017 ICS 49.030.10 Supersedes EN 4178:2009English Version Aerospace series - Screws, pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubri
6、cated - Classification: 1 100 MPa (at ambient temperature) / 315 C Srie arospatiale - Vis tte cylindrique, empreinte six lobes, tige normale tolrance large, filetage moyen, en alliage de titane, anodises, lubrifies MoS2 - Classification: 1 100 MPa ( temprature ambiante) / 315 C Luft- und Raumfahrt -
7、 Flachkopfschrauben mit Sechs-Bogenzahn, mit mittlerer Gewindelnge, aus Titanlegierung, anodisiert, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 C This European Standard was approved by CEN on 4 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
8、hich 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-CENELEC Management Centre or to any CEN member. This
9、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-CENELEC Management Centre has the same status as the official versions. CEN member
10、s are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal
11、, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in a
12、ny form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4178:2017 EBS EN 4178:2017EN 4178:2017 (E) 2 Contents Page European foreword 3 1 Scope 4 2 Normative references 4 3 Required characteristics 5 4 Designation . 8 5 Marking . 8 6 Technical specification . 8 Annex A (info
13、rmative) Standard evolution form 9 BS EN 4178:2017EN 4178:2017 (E) 3 European foreword This document (EN 4178:2017) 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
14、 Association, this European Standard has received 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
15、or by endorsement, at the latest by July 2017, and conflicting national standards shall be withdrawn at the latest by July 2017. 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
16、identifying any or all such patent rights. This document supersedes EN 4178:2009. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Repub
17、lic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdo
18、m. BS EN 4178:2017EN 4178:2017 (E) 4 1 Scope This European Standard specifies the characteristics of screws, pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated. Classification: 1 100 MPa 1) / 315 C 2). 2 Normative references T
19、he 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 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2424,
20、 Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 3911, Aerospace series Six lobe recess Geometrical definition EN 9100, Quality Management Systems Requirements for Aviation, Space and Defense Organizations EN 9133, Aero
21、space series - Quality management systems - Qualification procedure for aerospace standard parts ISO 3353-1, Aerospace Lead and runout threads Part 1: Rolled external threads 3)ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts 3)ISO 7913, Aerospace Bolts and screws, metric
22、 Tolerances of form and position 3)ISO 9152, Aerospace Bolts, with MJ threads, in titanium alloys, strength class 1 100 MPa Procurement specification 3)TR 3775, Aerospace series Bolts and pins Materials 4)TR 4070, Aerospace series Molybdenum disulphide coatings List of commercial products4)1) Minimu
23、m 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) Published by: ISO Internat
24、ional Organization for Standardization (http:/www.iso.ch/) 4) Published as ASD-STAN Technical Report at the date of publication of this European Standard by AeroSpace and Defence industries Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org) BS EN 4178:2017EN 4178:2017 (E) 5 3 Requ
25、ired characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres and apply after anodizing but before lubricating. 3.2 Tolerances of form and position ISO 7913 and those specified in Figure 1 and Table 1. 3.3 Materials TR 3775
26、(titanium alloy, classification 1 100 MPa). 3.4 Surface treatment Lubrication: a) Lubricant: see Clause 4; b) Application: EN 2491, 5 m to 10 m. BS EN 4178:2017EN 4178:2017 (E) 6 Key 1 Thread 2 Marking aConforms to ISO 3353-1 bRadius or chamfer cTwo holes optional for diameter codes 030 and 040 dThr
27、ee holes optional for diameter codes 050 to 120 eL4 = L1+ (L2) Figure 1 BS EN 4178:2017EN 4178:2017 (E) 7 Table 1 Diameter code Thread aD1 D2 D3 D4 D5 D6 D7 E G H h12 h13 Nom. Tol. min. H13 max. H13 Nom. Tol. Nom. Tol. 030 MJ3x0,5 4h6h 3 5,5 2,3 0 0,5 5,07 1,0 3,4 - 1,5 + 0,2 0 0,3 3 h13 040 MJ4x0,7
28、 4h6h 4 7,0 3,0 6,53 3,9 1,1 2,0 0,4 4 050 MJ5x0,8 4h6h 5 8,5 3,4 0,5 8,03 5,1 1,5 2,5 0,5 5 060 MJ6x1 4h6h 6 10,0 4,2 9,38 1,4 6,3 3,0 + 0,3 0 0,6 6 h14 080 MJ8x1 4h6h 8 13,0 6,2 12,33 7,5 1,9 4,0 0,8 8 100 MJ10x1,25 4h6h 10 16,0 7,9 15,33 1,6 10,2 2,4 5,0 + 0,5 0 1,0 10 120 MJ12x1,25 4h6h 12 18,0
29、9,8 17,23 13,8 6,0 1,2 12 Diameter code K L1 0,2 b c L2 L3 R W Recess Mass d 0,1 Length code Nom. max. min. EN 3911 Code e f 030 0,9 002 to 030 2 to 30 7,5 - 0,4 0,2 - 10 1,04 0,055 040 1,4 002 to 040 2 to 40 10,0 6,0 0,22 25 2,26 0,100 050 1,6 003 to 050 3 to 50 12,0 7,5 0,5 0,3 27 4,55 0,153 060 2
30、,0 003 to 060 3 to 60 14,0 8,5 0,7 0,5 30 6,95 0,222 080 2,4 004 to 080 4 to 80 16,5 10,5 0,27 45 15,44 0,395 100 005 to 100 5 to 100 20,5 13,0 0,8 0,6 50 29,30 0,616 120 006 to 120 6 to 120 22,5 14,5 0,9 55 43,10 0,887 aIn accordance with ISO 5855-2. bIncrements: 1 for L1 30 ; 2 for 30 100. cIf gre
31、ater 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 values (kg/1 000 pieces), calculated on the basis of 4,45 kg/dm, given for
32、information purposes only. They apply to screws without holes. eValue for head and first L4. fIncrease for each additional millimetre of L4. BS EN 4178:2017EN 4178:2017 (E) 8 4 Designation EXAMPLE Description block SCREW Identity block EN4178H050040 F Number of this standard Hole code (see Table 2)
33、Diameter code (see Table 1) Length code (see Table 1) Lubricant code (see TR 4070) 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 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 screws: see EN 9133. BS EN 4178:2017EN 4178:2017 (E) 9 Annex A (informative) Standard evolution form The main c
35、hanges with respect to the previous editions are listed in Table A.1. Table A.1 Main changes to previous editions (1 of 2) prEN/EN Number Edition Publication Date Modification Reason and validation EN 4178 1 11/2009 Add in normative references an Clause 6 b): EN 9133, Aerospace series Quality Manage
36、ment Systems Qualification Procedure for Aerospace Standard Products EN 3042 do not exist anymore and has been replaced by EN 9133 L4is not defined and has no tolerance values On the drawing h code is a mistake and has to be replaced by b (chamfer or radius) Code C and D are not written on the drawi
37、ng and linked with diameter range EN 4178 1 11/2009 Roughness symbol inside and above the drawing Add to all symbols : max e.g. Ra max 3,2 Ra max 0,8 Modify symbols according to ISO 1302 BS EN 4178:2017EN 4178:2017 (E) 10 Table A.1 Main changes to previous editions (2 of 2) prEN/EN Number Edition Pu
38、blication Date Modification Reason and validation EN 4178 1 11/2009 Replace NAS code by EN code for EU applications This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorpor
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