标准摘要
[中文适用范围]： 规定了公制尺寸和螺纹尺寸从 M 6 到 M 20（包括 M 20）的产品特性；表格列出了螺纹尺寸 M 6 至 M 20，标称长度为 12 mm 至 160 mm，以及参考国际标准的规格；给出了一个指定的例子。 [外文原描述]： Specifies the characteristics of products with metric dimensions and thread sizes from M 6 up to and including M 20; tabulates thread sizes M 6 up to M 20 with nominal lengths from 12 mm up to 160 mm and specifications with reference to International Standards; gives an example for the designation.
英文名称Cup head square neck bolts with small head and short neck — Product grade B