AECMA PREN 4080-1995 Aerospace Series Screws Pan Head Offset Cruciform Recess Threaded to Head in Alloy Steel Cadmium Plated Classification 900 MPa (at Ambient Temperature) 235 Deg.pdf

1、AECIA PRENx4080 95 LOL23LL 0009867 527 = Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to C3 Chairman prEN 4080 Edition P 2 October 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AEC

2、MA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.040.20 Supersedes Edition P 1 March 1994 Descriptors : ENGLISH VERSION Aerospace series Screws, pan head, offset cruciform recess, threaded to head, in alloy steel, cadmium plated Classification : 900 MPa (

3、at ambient temperature) / 235 OC Srie arospatiale Vis tte cylindrique, empreinte cruciforme dporte, filetes jusqu proximit de la tete, en acier alli, cadmies Classification : 900 MPa ( temprature ambiante) I 235 OC Luft- und Raumfahrt Flachkopfschrauben, mit Flgelkreuzschlitz, Gewinde annhernd bis K

4、opf, aus legiertem Stahl, verkadmet Klasse : 900 MPa (bei Raurntemperatur) 1235 OC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). it is published on green paper for the needs of AECMA-Members. It has been te

5、chnically approved by the experts of the concerned Technical Committee following comment by the Member countries. 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-ide

6、ntification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formai agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1995-10-31

7、 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Arena Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,- AECMA PREN*4080 95 10123LL 0009869 3TT I Page 3 prEN 4

8、080 : 1995 1 Scope This standard specifies the characteristics of screws, pan head, offset cruciform recess, threaded to head, in alloy steel, cadmium plated. Classification : 900 MPa / 235 OC 2, 2 Normative references IS0 3202 IS0 3353 IS0 5855-2 IS0 7689 IS0 7913 IS0 7994 EN 2000 EN 2133 EN 2424 T

9、R 3775 Aerospace - Screws, pan head, internal offset cruciform ribbed drive, threaded to head, MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - Dimensions Aerospace - Rolled threads for bolts - Lead and runout requirements Aerospace - MJ threads -

10、 Part 2 : Limit dimensions for bolts and nuts Aerospace - Alloy steel bolts with strength classification 1 100 MPa and MJ threads - Procurement specification Aerospace - Bolts and screws, metric - Tolerances of form and position Aerospace - Internal drive, offset cruciform recess, (Torq-Set ) for ro

11、tary fastening devices - Metric series Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Cadmium plating of steels with maximum specified tensile strength equal to or less than 1 450 MPa and copper and copper alloys - Aerospace series 3, A

12、erospace series - Marking of aerospace products Aerospace series - Bolts and pins - National 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

13、ambient temperature. The maximum temperature is determined by the surface treatment. 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Technical Report at the date of publication of this standard Copyright Association Europeene des Constructeurs de Mate

14、riel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,- - AECMA PRENa4080 95 10123LL 0009870 OLL Page 4 prEN 4080 : 1995 3 Required characteristics 3.1 See figure 1 and table 1. Configuration - Dimensions - Masses

15、Dimensions and tolerances are : in conformity with IS0 3202, expressed in millimetres and apply after surface treatment. 3.2 IS0 7913 Tolerances of form and position 3.3 Materials TR 3775 (alloy steel, strength class 900 MPa) 3.4 Surface treatment EN 21 33, 8 ,um to 14 pm on all surfaces which can b

16、e contacted by a 20 mm diameter ball. On all other surfaces, a continuous cadmium plating shall be present, but no value is specified. Black coiour option : code B Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo repr

17、oduction or networking permitted without license from IHS-,-,-AECMA PREN*408O 35 e 30323LL O009873 T58 D i Page 5 prEN 4080 : 1995 Values in micrometres apply prior to surface treatment. “;/“I Break sharp edges 0,l to 0,4 Conforms to IS0 3353 w 7-t I) Shape optional Figure 1 Table 1 Marking r ive :

18、see 4 2) Increments : 2 for L 5 100 4 for L 100 3) If greater lengths are required, they shall be chosen using the above increment. The length code corresponds to length L, completed by one or two zeros to the left, where necessary, to obtain a three digit code. 4) Approximate values kg/l O00 pieces

19、). calculated on the basis of 7,85 kg/dm3, given for information purposes only 5) Value for head and first L 6) Increase for each additional 2 mm of L. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or

20、networking permitted without license from IHS-,-,-AECMA PRENmqOBO 95 LOL23Ll 0009872 994 Diameter code (see table 1) Number of this standard Page 6 prEN 4080 : 1995 - IS0 7994 R A IS0 7994 unribbed 4 030 to 040 050 to 120 Designation -a N C + MJ EXAMPLE : Description block 1 Identity block I: SCREW

21、I EN4080-050040Al T TTT NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. Table 2 I Drive I Code I 5 Marking See table 3 and figure 1, indented. Table 3 EN 2424 Stvle Diameter code Copyright Association Europeene des Constructeurs de Materiel A

22、erospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PRENa40BO 95 I LOL23LL 0009873 820 - Page 7 prEN 4080 : 1995 6 Technical specification IS0 7689, with the following modifications : 6.1 Approval of manufacture

23、rs EN 2000 6.2 Other modified requirements - Hardness at the end of the thread, apply : . in Brinell : 269 / 321 HBS, . in Vickers : 284 / 340 HV 30 ; - Inspection of discontinuities shall be carried out during the microstructure inspection. 6.3 Requirements deleted - Qualification of screws ; - Ten

24、sile strength ; - Double shear strength ; - Tension fatigue strength ; - Head to shank fillet work effect. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-