ASD-STAN PREN 4178-2014 Aerospace series Screws pan head six lobe recess coarse tolerance normal shank medium length thread in titanium alloy anodized MoS2 lubricated Classificatio.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4178 Edition P 2 November 2014 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Supersedes edition P 1 of Aug

2、ust 1984 and will supersede EN 4178:2009 Descriptors: ENGLISH VERSION Aerospace series Screws, pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated Classification: 1 100 MPa (at ambient temperature) / 315 C Srie arospatiale Vis

3、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 Flachkopfschrauben mit Sechs-Bogenzahn, mit mittlerer Gewindelnge, aus Titanlegierung, anodi

4、siert, MoS2-geschmiert Klasse: 1 100 MPa (bei Raumtemperatur) / 315 C This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Ind

5、ustry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identificat

6、ion of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then

7、to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1st November 2014 Comments should be sent within six months after the date of publication to ASD-STAN Mechanica

8、l Domain Copyright 2014 by ASD-STAN prEN 4178:2014 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Required characteristics . 3 4 Designation 7 5 Marking . 7 6 Technical specification . 7 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechani

9、cal Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4178:2014 (E) 3 1 Scope This European Standard specifies the characteristics of screws, pan head, six lobe

10、 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 The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicat

11、ion. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods

12、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 run

13、out 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 Tolerances of form and position 3)ISO 9152, Aerospace Bolts, with MJ threads, in titanium alloys, strength class 1 100 MPa Procure

14、ment specification 3)TR 3775, Aerospace series Bolts and pins National materials 4)TR 4070, Aerospace series Molybdenum disulphide dry lubricants List of commercial products 4) 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are expr

15、essed 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. 1) Minimum tensile strength of the material at ambient temperature. 2) Maximum temperature that the screw can withstand without continuous

16、change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the surface treatment. 3) Published by: ISO International Organization for Standardization (http:/www.iso.ch/) 4) Published as ASD-STAN Technical Report at the date of publication of

17、 this standard (www.asd-stan.org) prEN 4178:2014 (E) 4 3.3 Materials TR 3775 (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. prEN 4178:2014 (E) 5 Key 1 Thread 2 Marking a Conforms to ISO 3353-1 b Radius

18、or chamfer c Two holes optional for diameter codes 030 and 040 d Three holes optional for diameter codes 050 to 120 e L4 = L1+ (L2) Figure 1 prEN 4178:2014 (E) 6 Table 1 Diameter code Thread aD1D2D3D4D5D6D7E 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

19、5,07 1,0 3,4 - 1,5 0 + 0,2 0,3 3 h13 040 MJ4x0,7 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 + 0,3 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,

20、4 5,0 0 + 0,5 1,0 10 120 MJ12x1,25 4h6h 12 18,0 9,8 17,23 13,8 6,0 1,2 12 Diameter code K L1 0,2 b c L2L3R 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

21、 3 to 50 12,0 7,5 0,5 0,3 27 4,55 0,153 060 2,0 003 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. bIn

22、crements: 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 values (kg/1 000 pieces), calc

23、ulated on the basis of 4,45 kg/dm, given for information purposes only. They apply to screws without holes. eValue for head and first L4. fIncrease for each additional millimetre of L4. prEN 4178:2014 (E) 7 4 Designation EXEMPLE Description block SCREW Identity block EN4178H050040 F Number of this s

24、tandard Hole code (see Table 2) 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 - (hyp

25、hen) 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 9152, except for clauses: a) Approval of manufacturers: see EN 9100; b) Qualification of screws: see EN 9133. prEN 4178:2014 (E) 8 Annex A (informative) Standard evol

26、ution form The main changes with respect to the previous editions are listed in Table A.1. Table A.1 Main changes to previous editions (1 to 2) prEN/EN Number Edition Publication Date Modification Reason and validation EN 4178 1 11/2009 Add in normative references an 6.b: EN 9133, Aerospace series Q

27、uality management systems Qualification procedure for aerospace standard parts EN 3042 do not exist anymore and has been replaced by EN 9133 - L4 is 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 wri

28、tten on the drawing and linked with diameter rangeEN 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 prEN 4178:2014 (E) 9 Table A.1 Main changes to previous editions (1 to 2) prEN/EN Number Edition Publication Date Modification Reason and validation EN 4178 1 11/2009 Replace NAS code by EN code for EU applications