1、i CEN PREN*37LO 90 E 3404589 OOL5LO9 2 E _ _ _ . - - A.E .C. M .A. STAN DARD prEN 3710 NORME A,E.C.M,A. Issue P 1 A.E.C.M.A. NORM October 1990 after ihe dale of publication decision A E C.M.A. 88. Bd Malesherbes 7500E PASIS FRAKCE 1990-10-31 I EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE M
2、ATERIEL AEROSPATIAL 88. boulevard Malesherbes, 75008 PARIS -TEL 45-63-62-85 Mr. WILLIAMS - CrolsrM= UDC : Key words : ENGLISH VERSION Serie arospatiale Douille bihexagonal Spcification technique Aerospace series Sockets, bi-hexagonal Technical Specification Luft- und Raumfahrt Steckschlsseleinsatze,
3、 Doppelsechskant Tech ni sc h e Lief er bed ing u ng en This .Aerospace Series). pre-standard has been drawn up under the responsibility of AECIL4A (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically
4、approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that nterchangeabilit y is affected, physically or functionally, without re-identification of the
5、 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 drafr European Standard to CEN (European Committee for Standardization) for final vote. Nota - Extra Copies can be sup
6、plied by B.N.A E. - 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT , C8 Chairman 6 Edition approved for publication I Comments should be sent within six months I COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services CEN PREN*37LO 90 I 3
7、404589 0015L10 9 I 1 Scope and field of b This standard specif use. prEX 37 1 O Page 3 appl i cati on es the properties of double-hex sockets for aerespece a 2 References IS0 1174 Assembly tools for boltrand screws- Driving squares for power socket wrenches and hand socket wrenches IS0 601 Wrench an
8、d socket opening Metric series -Tolerancesfor general use EN 2424 kerospsce series- Identification marking of standard fasteneryl) EN 3709 AercspGce series- Wrenches and socketrbihexagonal-Technical specification 2). 3 Requirmnts - . 3.1 Configuration dimensions - tolerances - To see figure and tebl
9、e page 4 - Dimensions ore in millimeters - Tolerances opening socket IS0 6C1 - Specificction driving squcre IS0 1174 3.2 Material The miteriz1 quality is left at the manufacturers option. 3.3 Harners The hardness test shall be performed in compliance with requirements of EN 3703. The hordness requjr
10、ed for square drive sockets is as follows : 42 HRC 54 3.4 Surface treatment Nickel chromium deposit Rickel thickness 5 Y m min. Chronium thickness 0,25,iJ m Ein. 1) Published as kECHA stcndard 2t the date of publication of the present standard. 2) Published as AECMA pre- stndard ct the date of publi
11、cation of-the present r standard. m Previous page is blank _I COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PREN*37LO 90 m 3404589 OOLSLLL O BEST COPY AVAILABLE I I 10 (318 (tnc - - 3 :2.5 :7 ) :in:h) COPYRIGHT Association Europee
12、ne Des Constructeurs de Materiel AerospaceLicensed by Information Handling Servicesp:EN 37 1 O Page 5 Standard EN identification nunber 1 Lenght code 4 Identificatlon Exempl e : Description block Double-hex socket Aerospace series Identity block EN 2710 B 125 14 ir-r-r Note : If necessary the origin
13、ator code I9005 may be introduced between the descritpion block and the identity block. 5 krking EN 2424, style C, as indicated cn the figure additional with the width accrcss flat. 6 Technical specification EN 3703. e COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services
