1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2138 Edition 2 August 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs: 49.040.20 Will supersede EN 2 138 January 1993 Descriptors: Aircraft indus
2、try - Washers - Steels - Designation, dimensions ENGLISH VERSION Aerospace series Washers, flat, in steel, cadmium plated Srie arospatiale Rondelles plates, en acier, cadmies Luft- und Raumfahrt Scheiben, aus Stahl, verkadmet This “Aerospace series“ Standard has been drawn up under the responsibilit
3、y of AECMA (The European Association of Aerospace Industries). it is published on yellow paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Edition approved for publication 1
4、997-08-29 The equivalent versions in French and German languages can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau 921 38 ISSY - LEC - MOULINEAUX CEDEX - FRANCE Page 3 prEN 21 38: 1997 1 Scope This standard specifies the characteristics of flat steel washers, cadmium plat
5、ed, for maximum operating temperature 235 OC, for aerospacec applications. They are intended for use primarily underneath nuts, for use underneath bolt heads the compatibility shall be checked. 2 Normative references This European Standard incorporates by dated or undated reference provisions from o
6、ther publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment
7、or revision. For undated references the latest edition of the publication referred to applies. EN 2000 Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers EN 2133 Aerospace series - Cadmium plating of steels, with maximum specified tensile s
8、trength equal to or less than 1 450 MPa, copper, copper alloys and nickel alloys 1) EN 2209 Steel FE-PL43 S - 900 MPa I R, I 1 100 MPa - Sheets, strips and plates 0,5 mm 5 a I 20 mm - Aerospace series 1) EN 2424 Aerospace series - Marking of aerospace products EN 2438 Steel FE-PL62 - 900 MPa I R, I
9、1 100 MPa - Bars O, S 40 mm - Aerospace series 1) 3 Required characteristics 3.1 See figure 1 and tables 1 and 2. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. Configuration - Dimensions - Masses 3.2 Materials EN 2209 or EN 2438 3.3 Surface treatment EN 21
10、33, 7 pm to 10 pm Black colour option: code F 1) Published as AECMA Standard at the date of publication of this standard Previous page is blank STD-AECMA PREN 2L38-ENGL 1997 W LOL23L1 0013322 209 Page 4 prEN 21 38: 1997 Values in micrometres apply prior to surface treatment. !Y VI Remove sharp edges
11、 0,l to 0,2. Both faces Figure 1 Table 1 - Y - 0,18 0,25 - Page 5 prEN 21 38: 1997 S Code Thickness Diameter code Table 2 0,4 03 1 ,o 1.6 2,o 2,5 04 05 10 16 20 25 Mass 1) 160 180 200 220 32 32 - - 3,14 5,02 6,27 - 10,04 - - 3,79 6,07 7,58 - 12,15 - - 4,93 7,90 9,86 - 15,80 - - - 8,47 10,57 - 16,94
12、Description block WASHER 4 Designation Identity block EN21 38-0802OF EXAMPLE: Numbe f his st ndard TT Diameter code (see table 1) Thickness code (see table 2) Black colour code (see 3.3) NOTE: If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style G 6 Quality assurance EN 2000
