标准摘要
[中文适用范围]： 本国际标准规定了公制系列通用螺栓和螺钉的头下半径尺寸和过渡直径。 [外文原描述]： This International Standard specifies the sizes of the radii under the head and the transition diameters of metric series general purpose bolts and screws.
英文名称General purpose bolts and screws — Metric series — Radii under the head