标准摘要
[中文适用范围]： 本文件规定了带轴环的内六角圆头螺钉的特性，由于头部设计而降低了负载能力，采用钢制，公制粗牙螺纹 M3 至 M16，产品等级为 A。 如果在某些情况下要求其他规格，则尺寸选项可从 ISO 888 中选择。 注：降低的负载能力（与本文件中指定的头部尺寸以及内六角孔的穿透度相关）意味着由特定标记（前面带有零的性能等级）显示的极限拉伸负载的限制。 。 对于所有尺寸和所有性能等级，头部的负载能力假定为螺纹中负载能力的 80%，请参见表 4。 [外文原描述]： This document specifies the characteristics of hexagon socket button head screws with collar, with reduced loadability due to head design, in steel, with metric coarse pitch threads M3 to M16, and with product grade A. If in certain cases other specifications are requested, dimensional options can be selected from ISO 888 or ISO 4753 . NOTE The reduced loadability (related to the head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4 .
英文名称Fasteners — Button head screws with reduced loadability — Part 2: Hexagon socket button head screws with collar