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STANDARD
SIST EN 3748:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3748November 2001ICS 49.080English versionAerospace series - O-ring grooves - DimensionsSérie aérospatiale - Gorges pour joints toriques -DimensionsLuft- und Raumfahrt - Nuten für O-Ringe - MaßeThis European Standard was approved by CEN on 11 August 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3748:2001 ESIST EN 3748:2004
EN 3748:2001 (E)2ForewordThis European Standard has been prepared by the European Association of Aerospace Manufacturers(AECMA).After inquiries and votes carried out in accordance with the rules of this Association, this Standard hasreceived the approval of the National Associations and the Official Services of the member countries ofAECMA, prior to its presentation to CEN.This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by May 2002, and conflicting national standards shall be withdrawn atthe latest by May 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,Spain, Sweden, Switzerland and the United Kingdom.ContentsPage1Scope.32Normative references.33Symbols.34Required characteristics.34.1Configuration - Dimensions - Tolerances.34.1.1Radial sealing – Rod housing: Configuration code A.44.1.2Radial sealing – Bore housing: Configuration code B.104.1.3Axial sealing for internal pressure: Configuration code C.164.1.4Axial sealing for external pressure: Configuration code D.225Designation.286Drawing presentation.286.1Configuration code A.286.2Configuration code B.286.3Configuration code C.296.4Configuration code D.29SIST EN 3748:2004
EN 3748:2001 (E)31 ScopeThis standard specifies the dimensions of grooves for use with o-rings according to EN-standards foraerospace applications:– radial sealing: rod or bore mounted o-rings;– axial sealing: internal or external pressure source.2 Normative referencesThis European Standard incorporates by dated or undated reference provisions from other publications.These normative references are cited at the appr
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