3896 (ISO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEKAYHAPOAHAR OPIAHM3ALMA IO CTAHAAPTW3ALWM-ORGANISATION INTERNATIONALE DE NORMALISATION Road vehicles - Screened and waterproof spark-plug and its connection -- Type 3 Vehicules routiers -- Bougie d'allumage blindee et étanche et sa connexion -- Type 3 Third edition - 1986-03-15 UDC 621.43.045 Ref. No. ISO 3896-1986 (E) 9861-9688 0S Descriptors : road vehicies, internal combustion engines, controlled ignition engines, ignition systems, spark plugs, dimensions. Price based on 3 pages Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental 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. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 3896 was prepared by Technical Committee ISO/TC 22, Road vehicles. This third edition cancels and replaces the second edition (1S0 3896-1979), of which it constitutes a minor revision. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1986 Printed in Switzerland ted without license from IHS Not for Resale ISO 3896-1986 (E) INTERNATIONAL STANDARD Road vehicles - Screened and waterproof spark-plug and its connection - Type 3 Scope 4 Required characteristics for spark-plug and 7 housing in the cylinder head This International Standard specifies the essential dimensional characteristics of a spark-plug type used with spark ignition 4.11 Dimensions and thread (see figure) engines. 4.1.1 Plug reach and other dimensions 2 Field of application The requirements of this International Standard apply to screened and waterproof spark-plugs and their connections, Dimensions in millimetres type 3. A M18 × 1,5 7/8-18 Normal reach Long reach 20,3 ± 0,2 15,9 ± 0,2 19,4 ± 0,2 3 References c 2,0 to 2,3 1,1 to 1,7 (see 4.1.2) Iso 68, IsO general purpose screw threads - Basic profile. D 15,5 ± 0,25 19,8 ± 0,25 E max. 24,7 28,4 ISO 261, ISO general purpose metric screw threads -- General F min. 27 32 plan. G min. 36 40 29 Iso 965/1, /sO general purpose metric. screw threads H min. 27 38 Tolerances --- Part 1 : Principles and basic data. Iso 965/3, /so general purpose metric screw threads 4.1.2 Gasket Tolerances - Part 3 : Deviations for constructional threads. ISo3412Roadvehicles--Screenedandwaterproofspark When the spark-plugs have been tightened with a torque of plug and its connection - Type 1. 48 N.m (threads clean, smooth and dry), the gasket thickness shall correspond to dimension C in the table in 4.1.1. If the IS0 3895, Road vehicles -- Screened and waterproof spark- gaskets are of a different thickness, a corresponding adjust- plug and its connection - Type 2. ment to dimension B shall be made. 1 Copyright International Organization for Standardization se with ISC censefromIHS Not for Resale