ISO 16246:2005

Road vehicles — M12 x 1,25 spark-plugs with flat seating and 14 mm hexagon and their cylinder head housing

ISO 16246:2005 specifies the characteristics of M12 x 1,25 spark-plugs with flat seating and 14 mm hexagon and their cylinder head housings, used with spark-ignition engines in road vehicles.

Véhicules routiers — Bougies d'allumage M12 x 1,25 à siège plat et à hexagone de 14 mm et leur logement dans la culasse

General Information

• Status: Withdrawn
• Publication Date: 20-Apr-2005
• Withdrawal Date: 20-Apr-2005
• ICS: 43.060.50 - Electrical and electronic equipment. Control systems
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 1 - Ignition Equipment
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 04-Feb-2011

Relations

• Consolidated By: ISO 4007:2012 - Personal protective equipment — Eye and face protection — Vocabulary
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16246
First edition
2005-04-15

Road vehicles — M12 x 1,25 spark-plugs
with flat seating and 14 mm hexagon and
their cylinder head housing
Véhicules routiers — Bougies d'allumage M12 x 1,25 à siège plat et à
hexagone de 14 mm et leur logement dans la culasse




Reference number
ISO 16246:2005(E)
©
ISO 2005

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ISO 16246:2005(E)
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ISO 16246:2005(E)
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, 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16246 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 1, Ignition
equipment.

© ISO 2005 – All rights reserved iii

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INTERNATIONAL STANDARD ISO 16246:2005(E)

Road vehicles — M12 x 1,25 spark-plugs with flat seating and
14 mm hexagon and their cylinder head housing
1 Scope
This International Standard specifies the characteristics of M12 × 1,25 spark-plugs with flat seating and
14 mm hexagon and their cylinder head housings, used with spark-ignition engines in road vehicles.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
ISO 261, ISO general purpose metric screw threads — General plan
ISO 965-1, ISO general-purpose metric screw threads — Tolerances — Part 1: Principles and basic data
ISO 965-3, ISO general purpose metric screw threads — Tolerances — Part 3: Deviations for constructional
screw threads
ISO 14508, Road vehicles — Spark-plugs — Terminals
3 Terminals
The spark-plug terminal may be either a solid post or threaded terminal, as specified in ISO 14508.
A spark-plug with a threaded terminal on which a nut is applied shall have the same dimensions as those
shown for spark-plugs with solid post terminals in Figures 1 and 2.
4 Dimensions and threads
4.1 Spark-plug reach
The spark-plug reach shall be in accordance with Table 1 (see Figures 1 to 4).
© ISO 2005 – All rights reserved 1

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ISO 16246:2005(E)
Table 1 — Spark-plug reach
Dimensions in millimetres

a
A E B Y
Type of reach max. + 0,3
Tolerance of A + E: ± 0,2
− 0,8
Normal 12,7 21 11,7
0
Long 27
19 18
Extended long 1,5 … 6 31
Extra-long 0 34,5
26,5 25,5
Extended extra-long 1,5 … 6 38,5
a
It is intended that E be specified more definitively in future revisions of this International Standard.
4.2 Gasket
When the spark-plugs have been tig
...