TIS 339.1-3-1980
ISO一般用途米制螺纹公差标准.第1部分:原则和基本数据.第2部分:一般用途的螺栓和螺母螺纹的尺寸极限.中等质量.第3部分:结构螺纹的偏差
Standard for tolerances for iso general purpose metric screw threads.part Ⅰ: principles and basic data.part Ⅱ: limits of sizes for commercial bolt and nut thread.medium quality.part Ⅲ: deviations for constructional threads