(ISO NTERNATIONAL STANDARD 451 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKIYHAPOIHA OPIAHW3ALIWA HIO CTAHIAPTW3ALIMM·ORGANISATION INTERNATIONALE DE NORMALISATION Aircraft -- Pressure re-oiling connection Aeronefs-- Raccordpour remplissage souspression en lubrifiant First edition - 1976-06-15 UDC 629.7.063.6 :621.643.4 Ref.No.1SO 451-1976 (E) ISO451-1976 Descriptors : aircraft equipment, lubrication systems, pipe fittings, couplings, dimensions. Price based on 2 pages E"eqrtkijigf"d("WPG.'E"1 "tkijvu'tgugtxgf+='Uwp"Hgd"3:*22<3:<36"WVE"4246 weuknnirwintk1nf FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO Member Bodies). The work of developing International Standards is carried out through Iso Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISo Council. Prior to 1972, the results of the work of the Technical Committees were published as Iso Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical technically suitable for transformation. International Standard ISO 451 therefore replaces ISO Recommendation R 451-1965 to which it is technically identical. countries : Belgium Iran Portugal Canada Israel Spain Chile Italy Sweden Czechoslovakia Japan Turkey Finland Netherlands United Kingdom France New Zealand U.S.S.R. Germany Poland Yugoslavia No Member Body expressed disapproval of the Recommendation. No Member Body disapproved the transformation of ISO/R 451 into an International Standard. @ International Organization for Standardization, 1976 : Printed in Switzerland E"eqr[tkijvgf'd"WPG."E1"1gpqxc."8'4:226Ocftf."Urckp"cm'tkijw'tgugtxgf"Uwp"Hgd’3:'223:<36"WVE"4246 INTERNATIONAL STANDARD ISO 451-1976 (E) Aircraft Pressure re-oiling connection 1 SCOPEAND FIELD OFAPPLICATION This International Standard specifies the basic dimensions of a pressure re-oiling connection for use with all oils for aircraft engines,andtheclearanceenvelopetobeprovided. 2 REQUIREDCHARACTERISTICS The dimensions and tolerances of the connection and space envelope are given in the figure and table. Shaded line denotes clearance envelope 30 S Φg Valve closed .Valveopen w Enlarged detail at diameter g This face shall be at Cutter radius -right angles to the axis of the coupling Enlarged detail of bayonet slot Three bayonet slots equally spaced at 120° ± 15' (4,8 mm (0.1875in)cutterdiameter) E"eqr{tkijvgf'd["WPG."E"1 I gpqxc.8"4 :226°Ocftkf."Urckp*cm"tkijwu'tgugtxgf+="Uwp"Hgd*3 :*22<3 :<36"WVE"424