1、 A. E.C.M .A. STANDARD NORME A. E.C. M.A. A.E.C.M.A. NORM Edition approved for publication prE N 2949 Issue P 1 June 1986 Comments should be sent within six months C3 Chairman after the date of publication decision DIT PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard
2、 Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Washer, bent tab Heat resisting steel Srie arospatiale Patte dancrage en acier rsistant chaud Luft- und Raumfahrt Sicherungsbleche aus hochwarmfestem Stahl This standard is initially published on green pape
3、r for the needs of AECMA-Members (Association Europenne des Constructeurs de Matriel Arospatial). It has been technically approved by the experts of the concerned AECMA Commission following comment by the manufacturers of the Member countries. After examination and signature of the AECMA Standard Ch
4、ecking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be publishedin its final version on yellow paper as an AECMA Standard. 2 June 1986 A.E.C.M.A. 88, Ed. Malesherbes Mr ARENA 75008 PARIS - FRANCE 0 aecma 1986 - issue P1 prEN2949 Page 3 1 Scope and field
5、of application This standard specifies the characteristics of heat resisting steel bend tab wire locking washers for use in aerospace application at temperature below 650 “C. They are intended for use as an anchor point for wire used -to lock bolt heads and nuts. 2 References EN2424 Identification m
6、arking of standard fasteners - Aerospace series EN2463 Steel FE-PA 13, softened sheet, strips and plates 0,5 mm - a 5 20 mm - Aerospace series EN2516 Aerospace series - Passivation of corrosion resisting steels i). 3 Required characteristics 3.1. Configuration - Dimensions - Tolerances The configura
7、tion shall be in accordance with the figure ; the dimensions and tolerances shall conform to the values shown in the figure and in the table after passivation. 3.2. Surface roughness See figure - The values apply before passivation, 3.3. Naterials Steel EN2463. 3 4. Surface treatment Passivation EN2
8、516 Previous page ; ! is blank 1) In preparation. 0233bR0386T4 i AECMA PREN2q Bb 9 1012311 0004554 B 9 Issue PI prEN2949 Page 4 Break sharp edges 0,l to 0,2 1 20,l LI- RadiusB / - Figure - Configuration Table : Dimensions and mass Dimensions in millimetres D - +0,25 L +O y 25 - Mass 1) kg/ 1000 piec
9、es OY46 Size O30 050 370 7YO 4YO 435 0,61 OY67 5Y5 0,86 i,36 925 11,5 7,: k +-I-=- 12,5 890 9Y5 1?, 13,5 1,50 1,72 10,5 14,5 1,30 1 i) Mass calculated on ehe basis of 7,85 kg/dm3. 0233ER0386T4 Issue PI prEN2949 Page 5 4 Designation Each tab washer shall only be designated as in the following Descrip
10、tion block Identity block WASHER, BENT TAB EN294 I 5-0; - i O80 : Size code (see table) example : O - - Note : If necessary the originator Code S 9005 may be intrcduced between the description block aiid the identity block. 5 Marking EN24D style G (Paclcging) . In addition the quantity shall be declared (mass or number).
