ISO 3412:1992
(Main)Road vehicles - Screened and waterproof spark-plugs and their connections - Types 1A and 1B
Road vehicles - Screened and waterproof spark-plugs and their connections - Types 1A and 1B
Specifies the essential dimensional characteristics of a spark-plug type used with spark ignition engines. Tabulates major, pitch, and minor diameters for plug thread and connector thread. A figure illustrates shapes and reference quantities of concern.
Véhicules routiers — Bougies d'allumage blindées et étanches et leurs connexions — Types 1A et 1B
General Information
Relations
Overview
ISO 3412:1992 - "Road vehicles - Screened and waterproof spark‑plugs and their connections - Types 1A and 1B" - is an International Standard that specifies the essential dimensional characteristics and connection details for screened, waterproof spark‑plugs used in spark‑ignition engines. Published in December 1992 (3rd edition), it replaces the 1979 edition and extends coverage to include Type 1B plugs. The standard includes tabulated thread dimensions and illustrative figures showing critical shapes and reference quantities.
Key topics and requirements
- Scope: Defines main characteristics of Types 1A and 1B screened, waterproof spark‑plugs and their electrical/mechanical connections for road vehicles.
- Thread and dimensional data: Tabulates major, pitch and minor diameters for plug threads and connector threads; figures provide dimensional reference points. Dimensions below a specified section line conform to the relevant spark‑plug thread standards.
- Connector specification:
- 5/8‑24 UNEF‑2B connector thread for the plug connector.
- Hexagon size: 19 mm across flats (minimum 21 mm across corners).
- Connector must provide watertightness, reliable electrical contact, and screening against radio‑electric radiation.
- Compatibility: References to other ISO standards for plug/cylinder‑head interfaces - notably ISO 1919, ISO 2345 and ISO 2346 (e.g., plug threads such as M14 x 1.25 and M18 x 1.5) - ensure interchangeability with cylinder head bores and threads.
- Normative and informative content: Annex A is informative (bibliography and related types).
Practical applications
- Ensures mechanical and electrical compatibility between spark‑plugs, connectors and engine cylinder heads in automotive design, manufacturing and maintenance.
- Guides:
- Automotive OEMs specifying ignition components.
- Aftermarket spark‑plug and connector manufacturers designing screened and waterproof products.
- Parts engineers and quality labs verifying dimensional tolerances and thread fit.
- Service and repair operations selecting compatible spark‑plugs and waterproof connectors for engines operating in harsh or electromagnetic‑sensitive environments.
Related standards
- ISO 1919 - spark‑plugs with flat seating
- ISO 2345 - spark‑plugs with conical seating
- ISO 2346 - compact spark‑plugs with flat seating
- ISO 3895 / ISO 3896 (referenced in the bibliography) - other screened/waterproof spark‑plug types
Keywords: ISO 3412:1992, screened and waterproof spark‑plugs, spark plug dimensions, 5/8‑24 UNEF‑2B, M14 x 1.25, M18 x 1.5, ignition engines, spark plug connector, automotive standards.
Frequently Asked Questions
ISO 3412:1992 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - Screened and waterproof spark-plugs and their connections - Types 1A and 1B". This standard covers: Specifies the essential dimensional characteristics of a spark-plug type used with spark ignition engines. Tabulates major, pitch, and minor diameters for plug thread and connector thread. A figure illustrates shapes and reference quantities of concern.
Specifies the essential dimensional characteristics of a spark-plug type used with spark ignition engines. Tabulates major, pitch, and minor diameters for plug thread and connector thread. A figure illustrates shapes and reference quantities of concern.
ISO 3412:1992 is classified under the following ICS (International Classification for Standards) categories: 43.060.50 - Electrical and electronic equipment. Control systems. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 3412:1992 has the following relationships with other standards: It is inter standard links to ISO 3412:1979. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 3412:1992 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD
Third edition
1992-12-15
Road vehicles - Screened and waterproof
spark-plugs and their connections -
Types IA and IB
- Bougies d’allumage blindees et etanches et leurs
V&hicules routiers
- Types 7A et 7B
connexions
Reference numher
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. Esch 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, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 3412 was prepared by Technical Committee
lSO/TC 22, ßoad vehicles, Sub-Committee SC 1, Ignition equipment.
This third edition cancels and replaces the second edition
(ISO 3412:1979), which has been extended to include type 1 B spark-
plugs.
Annex A of this International Standard is for information only.
0 ISO 1992
All rights reserved. No part of this publication may be reproduced or utilized in any ferm or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission In writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzeriand
Printed in Switzerland
INTERNATIONAL STANDARD
Road vehides - Screened and waterproof spark-plugs
and their connections - Types IA and IB
ISO 1919, ISO 2345 and ISO 2346. The dimensions
1 Scope
of the bore and the thread in the cylinder head shall
conform to the corresponding Standards.
This International Standard specifies the main charac-
teristics of screened and waterproof spark-plugs of
Details not specified are left to the manufacturer’s
types IA and 1 B and their connections, for use with
choice.
spark-ignition engines.
2 Normative references
3.2 Connection
The following Standards contain provisions which,
Dimension limits of the 5/8-24 UNEF connection
through reference in this text, constitute provisions
thread shall be as specified in table 1.
of this International Standard. At the time of publi-
cation, the editions i
...
NORME
Iso
INTERNATIONALE 3412
Troisième edition
1992-I 2-15
Whicules routiers - Bougies d’allumage
blindées et étanches et leurs
connexions -Types IA et IB
Road vehicles - Screened and waterproof spark-plugs and their
connections - Types ?A and IB
Numéro de référence
ISO 3412: 1992(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiée aux
comités techniques de I’ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comite technique créé à cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent également aux travaux. L’ISO colla-
bore étroitement avec la Commission électrotechnique internationale (CEI)
en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des co-
mités membres votants.
La Norme internationale ISO 3412 a été élaborée par le comité technique
lSO/K 22, Véhicules routiers, sous-comité SC 1, Équipement
d’allumage.
Cette troisième édition annule et remplace la deuxieme édition
(ISO 3412:1979), dont elle constitue une révision technique incluant les
bougies de type 1 B.
L’annexe A de la présente Norme internationale est donnée uniquement
a titre d’information.
0 ISO 1992
Droits de reproduction réserves. Aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie et les microfilms, sans l’accord écrit de l’éditeur.
Organisation internationale de normalisation
Case Postale 56 l CH-l 211 Genève 20 l Suisse
Imprimé en Suisse
ii
NORME INTERNATIONALE
Véhicules routiers - Bougies d’allumage blindées et
étanches et leurs connexicks
- TypesjA et IB
Toutes les dimensions au-dessous de la ligne AA
1 Domaine d’application
doivent être conformes aux dimensions et aux
filetages des bougies d’allumage correspondantes
La présente Norme internationale prescrit les princi-
(Ml4 x 1,25 et Ml8 x 1,5) normalisées dans
pales caractéristiques des bougies d’allumages blin-
I’ISO 1919, I’ISO 2345 et I’ISO 2346. Les dimensions
dées et étanches des types 1A et 1 B et de leurs
du logement dans la culasse doivent être conformes
connexions; ces bougies sont utilisées pour les mo-
aux normes correspondantes.
teurs à allumage commandé.
Les détails non spécifiés sont laissés a l’initiative du
2 Références normatives
fabricant.
Les normes suivantes contiennent des dispositions
qui, par suite de la référence qui en est faite, consti-
tuent des dispositions valables pour la
...
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