标准摘要
[中文适用范围]： 本标准规定了磨牙丝锥大径及中径的公差以及这些直径的极限尺寸。 按这种公差生产的丝锥用于 加工按ISO 228—1和ISO 7—1的G系列和RP系列的管螺纹。 用这些丝锥所加工的内螺纹， 习惯上简称为“螺母”。 [外文原描述]： Specifies the deviations and tolerances on the major diameter and the pitch diameter together with the limits of these diameters for ground thread taps intended for production of these pipe threads acoording to ISO 228-1 and ISO 7-1 respectively. the internal threads produced with the ground thread taps are conventionally designated by the simplified denomination od "nut".
英文名称Ground thread taps for pipe threads G series and Rp series — Tolerances on the threaded portion