AECMA PREN 4079-1994 Aerospace Series Screws 100 Degree Countersunk Normal Head Offset Cruciform Recess Threaded to Head in Alloy Steel Cadmium Plated Classification 900 MPa (at Am.pdf

1、CEN PRENx4079 94 = 3404589 0062628 927 Edition approved for publication Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE 1 994-03-3 1 AECMA STANDARD NORME AECMA AECMA NORM C3 Chairm

2、an M. Arena prEN 4079 Edition P 1 March 1994 EDITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors : ENGLISH VERSION Aerospace series Screws, 1 OOo countersunk

3、 normal head, offset cruciform recess, threaded to head, in alloy steel, cadmium plated Classification : 900 MPa (at ambient temperature) / 235 OC Srie arospatiale Vis tte fraise looo normale, empreinte cruciforme dporte, filetes jusqu proximit de la tte, en acier alli, cadmies Classification : 900

4、MPa ( temprature ambiante) / 235 OC Luft- und Raumfahrt looo Senkschrauben, mit Flgelkreuzschlitz, Gewinde annhernd bis Kopf, aus legiertem Stahl, verkadmet Klasse : 900 MPa (bei Raumtemperatur) / 235 OC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Associa

5、tion Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this prestandard, t

6、he 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 signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member c

7、ountries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formai vote. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without

8、license from IHS-,-,-CEN PREN84079 94 = 3404589 O062629 863 Page 3 prEN 4079 : 1994 1 Scope This standard specifies the characteristics of screws, 1 OOo countersunk normal head, offset cruciform recess, threaded to head, in alloy steel, cadmium plated. Classification 900 MPa ) / 235 OC 2, 2 Normativ

9、e references IS0 3353 IS0 5855-2 IS0 7689 IS0 7913 IS0 7994 EN 2000 EN 2133 EN 2205 EN 2424 EN 2438 EN 2444 TR 3775 Aerospace construction - Rolled threads for bolts - Lead and runout requirements Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Alloy steel bolts wit

10、h strength classification 1 100 MPa and MJ threads - Procurement specification Aerospace series - Fasteners - Tolerances of form and position for bolts and screws Aerospace - Internal drive, offset cruciform recess, (Torq-Set devices - Metric series 1 for rotary fastening Aerospace series - Quality

11、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, Steel FE-PL43 S - 900 MPa I R, I 1 100 MPa - Bars De I 40 mm - Aero

12、space series 3, Aerospace series - Marking of aerospace products 3, Steel FE-PL62 - 900 MPa S R, I 1 100 MPa - Bars De I40 mrn - Aerospace series 31 Steel FE-PL711 - 900 MPa I 1 100 MPa - Bars and wires De I 45 mrn - Aerospace series 3) Aerospace series - Bolts and pins - National materials 4, 1) Mi

13、nimum tensile strength of tmne 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 as AECMA Sta

14、ndard at the date of publication of this standard 4) Published as AECMA Technical Report at the date of publication of this standard Previous page is blank Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction

15、or networking permitted without license from IHS-,-,-CEN PRENM4079 94 II 3404589 00b2b30 585 II Page 4 prEN 4079 : 1994 3 Required characteristics 3.1 Configuration - Dimensions - Masses See figure 1 and table 1. Dimensions and tolerances, expressed in millimetres, apply after surface treatment. 3.2

16、 IS0 7913 Tolerances of form and position 3.3 Materials EN 2205, EN 2438, EN 2444 or TR 3775 (alloy steel, classification 900 MPa) 3.4 Surface treatment EN 2133, 8 pm to 14 ,um on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous cadmium plating shaH b

17、e present, but no value is specified. Black colour option : code B Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Y E E w m L c. O c. CEN PREN*4079 74

18、 M 3404589 0062633 4LL Page 5 prEN 4079 : 1994 .- C 0- Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CEN PREN*4079 94 m 3404589 00b2b32 358 m Page 6

19、prEN 4079 : 1994 5 III111111 u) 0 N ; CI 8 o, C O ri 2 CI - P o V c m al - al c E e E o O m O CI V o, U V c a al oi c I- - m I E L V C o, ,- 3 al Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or network

20、ing permitted without license from IHS-,-,-CEN PRENr4079 94 m 3404589 0062633 294 m Page 7 prEN 4079 : 1994 4 Designation EXAMPLE : Description block I Identity block SCREW I EN4079-050040AB 1 TTTT Number of this standard Diameter code (see table 1) Length code (see table 1) Drive code (see table 2)

21、 Black colour code (see 3.4) NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. Table 2 Drive IS0 7994 IS0 7994 unribbed 5 Marking See table 3 and figure 1. Table 3 EN 2424 Style Diameter code I 030and040 I N I I 050to 120 I B I 6 Technical spec

22、ification IS0 7689, with the following modifications : 6.1 Approval of manufacturers EN 2000 6.2 Other modified requirements - Inspection for discontinuities shall be carried out during the microstructure inspection ; - Classification of defects : replace AQL 0,065 % by 1 %. 6.3 Requirements deleted - Qualification of screws - Tensile strength - Double shear strength - Tension fatigue strength Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-