1、-. AECMA PREN*3303 95 E LOL23Ll 0009827 940 I Comments should be sent within six months after the date of publication to AECMA STANDARD NORME AECMA AECMA NORM C3 Chairman prEN 3303 Edition P 2 October 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 6-1 200
2、BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 Supersedes Issue P 1 August 1992 ICs : 49.040.20 Descriptors : ENGLISH VERSION Aerospace series Screws, cap head, hexagon socket, in alloy steel, cadmium plated Classification : 1 100 MPa (at ambient temperature) / 235 OC coarse tolerance nor
3、mal shank, medium length threai Srie arospatiale Luft- und Raumfahrt Vis tte cylindrique, six pans creux, tige normale tolrance large, filetage moyen, en acier alli, cadmies ( temprature ambiante) I 235 OC Zylinderschrauben mit Innensechskant, mittlere Gewindelnge, aus legiertem Stahl, verkadmet (be
4、i Raumtemperatur) / 235 OC Classification : 1 100 MPa Klasse : 1 100 MPa 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 technically
5、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-identificatio
6、n of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal 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. Nota - Extra copies
7、can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ICSY-LEC-MOULINEAUX CEDEX Edition approved for publication 1995-1 0-31 AECMA Gulledelle 94 6-1 200 BRUXELLES Mr Arena aecma 1995 AECMA PRENx3303 95 I 101231L 0009829 713 Page 3 prEN 3303 : 1995 1 Scope This standa
8、rd specifies the characteristics of screws, cap head, hexagon socket, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated. Classification : 1 100 MPa / 235 OC *) 2 Normative references IS0 3353 IS0 4762 IS0 5855-2 IS0 7689 IS0 7913 EN 2000 EN 2133 EN 2424 EN 3042 TR 3
9、775 Aerospace - Rolled threads for bolts - Lead and runout requirements Hexagon socket head cap screws - Product grade A Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Alloy steel bolts with strength classification 1 100 MPa and MJ threads - Procurement specificati
10、on Aerospace - Bolts and screws, metric - Tolerances of form and position 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 co
11、pper alloys - Aerospace series Aerospace series - Marking of aerospace products Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Bolts and pins - National materials 4, 1) Minimum tensile strength of the material at ambient temperature 2) Maxim
12、um 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 Standard at the date of publication of this standard 4) Published as AECMA
13、 Technical Report at the date of publication of this standard AECMA PREN*3303 95 m 1012311 0009830 435 m Page 4 prEN 3303 : 1995 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. Configuration - Dimensio
14、ns - Masses 3.2 IS0 7913, figure 1 and table 1 Tolerances of form and position 3.3 Materials TR 3775 (alloy steel, strength class 1 100 MPa) 3.4 Surface treatment EN 2133, 6 pm to 10 pm, on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shal
15、l be present, but no value is specified. Black colour option : code B AECIA PREN*3303 95 LOL233iL 000983L 371 Page 5 prEN 3303 : 1995 l - - c9 - O l i I I c I d O t O O O O ul al U ci m o Qi ci E .- 8 lu 8 E * ci 3 w ;5 E O o O O (v O O rn O v al U O o ci Qi c, E (P = .- 8 r S O .- ci ! 8 0) r C AEC
16、IA PRENx3303 75 m LOL23LL O009832 208 Page 6 prEN 3303 : 1995 al 3 Q I- ?I I t c - III1 II II II I $ 5 2 N E O al al - O rn + O + al C O El al al Q n ta - o O 4 rn S a, al O + fn El C O r s - s 3 L O O Q U O O 5 rn c a, a, E I- - ui .v C E L O S .- $ c O .a m a, rn C fn 3 C al fn O E o .- ui al O t
17、7 O - c s .- ; 3 L o u) O P Q m c - 2 - s 8 P E I- C O u) al 3 Q C O m .- c. Y- E C .- Y- C rJ .- ? m- E B FD -Y Ln 2 Y- O VI VI m Q C O .- n 5 U Q m al3 c - .a 2 AECMA PRENx3303 95 = L0123LL 0009833 144 Description block Page 7 prEN 3303 : 1995 Identity block EN3303D050010 4 Designation EXAMPLE : w
18、- Number of this standard Hole code (see table 2) Diameter code (see table 1) Holes with NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. Code D Diameter code 030 and 040 050to 200 I without I -(hvhen) I EN 2424 Style N C + MJ 5 Marking See ta
19、ble 3 and figure 1, indented. Table 3 6 Technical specification IS0 7689, with the following modifications : 6.1 Approval of manufacturers EN 2000 6.2 Qualification of screws EN 3042 6.3 Requirements deleted - Cold rolling ; - Double shear strength ; - Tension fatigue strength ; - Head to shank fillet work effect.
