Abstract / scope
ISO 22977:2005 specifies characteristics of M12 x 1,25 spark-plugs with flat seating and 14 mm bi-hexagon and of their cylinder head housings, for use with spark-ignition engines.
ISO 22977:2005Withdrawn
Road vehicles — M12 x 1,25 spark-plugs with flat seating and 14 mm bi-hexagon and their cylinder head housing
Véhicules routiers — Bougies d'allumage M12 x 1,25 à siège plat et bihexagonal de 14 mm et leur logement dans la culasse