1、_ CEN PREN*4075 94 m 3404589 00bb230 510 AECMA STANDARD prEN 4075 Edition P 1 AECMA NORM July 1994 NORME AECMA Edition approved for publication 1994-07-08 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux
2、 Cedex - Tl. (1) 47.36.98.76 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 C3 Chairman Mr Arena UDC : Descriptors : ENGLISH VERSION Aerospace series Screws, pan head, offset cruc
3、iform recess, threaded to head, in corrosion resisting steel, passivated Classification : 490 MPa (at ambient temperature) / 425 OC Srie arospatiale Luft- und Raumfahrt Vis tte cylindrique, Flachkopfschrauben, mit Flgelkreuzschlitz, Gewinde annhernd bis Kopf, aus korrosionsbestndigem Stahl, verkadme
4、t Klasse : 490 MPa (bei Raumtemperatur) I425 OC empreinte cruciforme dporte, filetes jusqu proximit de la tte, en acier rsistant ia corrosion, passives Classification : 490 MPa ( temprature ambiante) I425 OC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Ass
5、ociation 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 prestandar
6、d, 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 signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Memb
7、er countries it will be submitted as a draft European Standard to CEN (European committee for Standardization) for formal vote. CEN PREN*4075 94 H 340Lt587 0066231 q57 H Page 3 prEN 4075 : 1994 1 Scope This standard specifies the characteristics of screws, pan head, offset cruciform recess, threaded
8、 to head, in corrosion resisting steel, passivated. Classification : 490 MPa 1) / 425 OC 2) 2 Normative references IS0 3202 IS0 3353 IS0 5855-2 IS0 7913 IS0 7994 IS0 8168 EN 2000 EN 2424 EN 2516 TR 3775 Aerospace - Screws, pan head, internal offset cruciform ribbed drive, threaded to head, MJ thread
9、s, 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 - Part 2 : Limit dimensions for bolts and nuts Aerospace - Bolts and screws, metric - Tolerances of form
10、and position Aerospace - Internal drive, offset cruciform recess, (Torq-Set 1 for rotary fastening devices - Metric series Aerospace - Corrosion- and heat-resisting steel bolts with strength classification 1 1 O0 MPa and MJ threads - Procurement specification Aerospace series - Quality assurance - E
11、N aerospace products - Approval of the quality system of manufacturers Aerospace series - Marking of aerospace products 3) Aerospace series - Passivation of corrosion resistant steels and decontamination of nickel base alloys 4) Aerospace series - Bolts and pins - National materials 5) 3 Required ch
12、aracteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are : in conformity wit IS0 3202, expressed in millimetres and apply after surface treatment. Configuration - Dimensions - Masses 3.2 IS0 7913 Tolerances of form and position 3.3 Materials TR 3775 (corrosion resisting steel, class
13、ification 490 MPa) 3.4 Surface treatment EN 2516 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. The maximum temperature is determine
14、d by the surface treatment. 3) Published as AECMA Standard at the date of publication of this standard 4) In preparation at the date of publication of this standard 5) Published as AECMA Technical Report at the date of publication of this standard Previous page is blank CEN PREN14075 94 34Q4589 00bb
15、232 393 Page 4 prEN 4075 : 1994 31 OJJ Values in microme-:es apply prior to surface Break sharp edges 0,l to 0,4 rea mer Marking , Drive : see 4 1) Shape optional Figure 1 Table 1 I I S I Mass 4, E R Diameter code 030 Length code TOI. TOI. nom. - 0,3 min. nom. TOI. MJ30,5-4h6h 4.7 2.3 M J4x0.7-4h6h
16、6,7 3 -0,5 O - 0,2 - O - 0,3 004 to 042 040 006 to 056 6to 56 loto 84 050 MJ5x0.8-4h6h I 10 I 8.7 I 3,4 I O08 to O70 O10 to 084 o1 o to 098 O10 to 112 O 060 MJ61-4h6h MJ71-4h6h MJ8x1-4h6h MJlOx1.25-4h6h 20 18,7 7,9 070 1 I 3.2 i 0,8 i 10.7 i 0,78 O80 1 O0 I I 014 to 140 14to140 I 0,8 I I 4 I 1 I 22.
17、3 I 122 120 MJ121.25-4h6h 24 22.7 9.8 IlII 7.2 o16 to 168 O -o,3 16to168 0,9 4.8 1.2 38.0 1,76 , 1) In accordance with IS0 5855-2 2) Increments : 2 for L I100 4forL 100 3) If greater lengths are required, they shall be chosen using the above increment. The length code corresponds to length L, comple
18、ted by one or two zeros to the left, where necessary, to obtain a three digit code. 4) Approximate values (kgll O00 pieces), 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. CEN PREN*4075 94 3404589 0
19、0bb233 227 Description block Page 5 prEN 4075 : 1994 Identity block 4 Designation EXAMPLE : Number of this standard Diameter code (see table 1) Length code (see table 1) Drive code (see table 2) Drive IS0 7994 IS0 7994 unribbed NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. Code None A Diameter code 030 and 040 050to 120 EN 2424 Style N B 6.3 Requirements deleted - Qualification of screws ; - Tensile strength ; - Double shear strength ; - Tension fatigue strength.
