Објављен
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.
ПОВУЧЕН
ISO 3412:1979
ОБЈАВЉЕН
ISO 3412:1992
90.60
Завршетак поступка преиспитивања стандарда
3. 9. 2026.