标准摘要
[中文适用范围]： 本文件规定了由于头部设计而降低负载能力的内六角圆头螺钉的特性，钢制和不锈钢材质，公制粗牙螺纹 M3 至 M16，产品等级 A。 如果在某些情况下，需要其他规格注：降低的承载能力（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）显示的极限拉伸载荷的限制。 ）。 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 reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M3 to M16, and with product grade A. If, in certain cases, other specifications are requested, stainless steel grades can be selected from ISO 3506 - 1 , and the dimensional options 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 Tabl e 4 .
英文名称Fasteners — Button head screws with reduced loadability — Part 1: Hexagon socket button head screws