Historical
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.
International Organization for Standardization [iso]