标准摘要
[中文适用范围]： 规定了螺栓、螺钉和类似外螺纹产品的底切的形式和尺寸，建议在需要插头等部件的情况下使用。 [外文原描述]： Lays down the form and dimensions of undercuts for bolts, screws and similar externally threaded products, recommended for use in those cases where it is needed for components such as plugs.
英文名称Fasteners — Thread undercuts for external metric ISO threads