ASD-STAN PREN 4073-2014 Aerospace series Screws pan head six lobe recess coarse tolerance shank medium length thread in alloy steel cadmium plated Classification 1 100 MPa (at ambi.pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4073 Edition P 2 June 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.orgICS: Supersedes edition P 1 of July

2、 1994 and will supersede EN 4073:2009 Descriptors: ENGLISH VERSION Aerospace series Screws, pan head, six lobe 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 cylindrique, emprein

3、te six lobes, tige tolrance large, filetage moyen, en acier alli, cadmies Classification : 1 100 MPa ( temprature ambiante) / 235 C Luft- und Raumfahrt Flachkopfschrauben, mit Sechs-Bogenzahn, mit mittlerer Gewindelnge, aus legiertem Stahl, verkadmet Klasse: 1 100 MPa (bei Raumtemperatur) / 235 C Th

4、is “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 Industry. It has been technically approved by the experts of the concerned

5、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-identification of the standard. After examination and review by users and formal ag

6、reement 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 to implement the EN at national level by giving the EN the status of a n

7、ational standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1stJune 2014 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain Copyright 2014 by ASD-STAN prEN 4073:2014 (E) 2 Contents Page Forewo

8、rd 2 1 Scope 3 2 Normative references 3 3 Required characteristics . 4 4 Designation 7 5 Marking . 7 6 Technical specification . 7 Annex A (normative) Standard evolution form . 9 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries a

9、nd 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 4073:2014 (E) 3 1 Scope This standard specifies the characteristics of screws, pan head, six lobe recess, coarse tolerance shank, mediu

10、m 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 applies.

11、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 EN 3

12、911, Aerospace series Six lobe recess Geometrical definition 3) EN 9100, Aerospace series 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, Aerosp

13、ace Lead and runout 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 To

14、lerances of form and position TR 3775, Aerospace series Bolts and pins Materials 4) 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.

15、The maximum temperature is determined by the surface treatment. 3) Published as ASD-STAN Prestandard at the date of publication of this standard. http:/www.asd-stan.org/ 4) Published as ASD-STAN Technical Report at the date of publication of this standard. http:/www.asd-stan.org/ prEN 4073:2014 (E)

16、4 3 Required characteristics 3.1 Configuration 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: alloy

17、steel, classification 1 100 MPa 3.4 Surface treatment EN 2133, thickness 8 m to 14 m, on all surfaces 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. prEN 4073:2014 (E) 5 Dimensions

18、 in millimetres Key 1 Thread 2 Marking 3 Conforms to ISO 3353-1 4 Radius or chamfer 5 Two holes optional (see Table 2) for diameter code 030 and 040 6 Three holes optional (see Table 2) for diameter code 050 to 120 7 L4 L1 (L2) Figure 1 Ramax 0,8 Ramax 1,6 0,4 0,1 Ramax 3,2 prEN 4073:2014 (E) 6 Tabl

19、e 1 Diameter code Thread a D1 D2 D3 D4 D5 D6 D7 E G h12 h13 nom. Tol. min. H13 max. H13 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 0,3 040 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

20、,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 1,6 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, c L2 L3 R W Recess Mass d nom Tol. 0,1 Length code nom. max. min. EN 3911 code

21、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 0,100 050 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 0,3

22、95 100 10 005 to 100 5 to 100 20,5 13,0 0,8 0,6 50 29,30 0,616 120 12 006 to 120 6 to 120 22,5 14,5 0,9 55 43,10 0,887 a In accordance with ISO 5855-2. b Increments: 1 for L1 30; 2 for 30 L1 100; 4 for L1 100. c If greater lengths are required, they shall be chosen using the above increments. The le

23、ngth code corresponds to the length L1, completed by one or two zeros to the left, where necessary, to obtain a three digit code. d Approximate 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. e Value for head

24、and first L4. f Increase for each additional millimetre of L4. prEN 4073:2014 (E) 7 4 Designation EXAMPLE Description block SCREW Identity 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 ne

25、cessary, 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 Figure 1. Table 3 Diameter code EN 2424 Style 030 and 040 N 050 to 120 B 6 Technical specificati

26、on 6.1 General ISO 7689, with the following modifications. prEN 4073:2014 (E) 8 6.2 Approval of manufacturers EN 9100 6.3 Qualification of bolts EN 9133 prEN 4073:2014 (E) 9 Annex A (normative) Standard evolution form MODIFICATION REASON AND VALIDATION Current D6 dimensions for diameter codes 40, 50

27、 and 80 are not achievable. Addition in normative references: EN 3911, Aerospace series Six lobe recess Geometrical definition There was no standard for six lobe definition. L4 is 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 e.g. Ra max 3,2 Ra max 0,8 Modify symbols according to ISO 1302. prEN 4073:2014 (E) 10 MODIFICATION REASON AND VALIDATION Replace NAS code by EN code for EU applications