标准摘要
[中文适用范围]： 规定了火花点火式发动机所用火花塞类型的基本尺寸特性。 列出插头螺纹和连接器螺纹的大径、节距和小径。 一张图说明了所关注的形状和参考数量。 第三版取消并取代了第二版（1979 年）。 [外文原描述]： 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. This third edition cancels and replaces the second edition (1979).
英文名称Road vehicles — Screened and waterproof spark-plug and its connection — Type 3