ISO 14581:2022 紧固件 内六角花形沉头螺钉

标准编号：ISO 14581:2022

中文名称：紧固件 内六角花形沉头螺钉

英文名称：Fasteners — Hexalobular socket countersunk flat head screws (common head style) with reduced loadability

发布日期：2022-12

标准范围

本文件规定了由于头部设计而导致负载能力降低的钢和不锈钢六角内六角平头螺钉的特性，带有公制粗螺距螺纹？M2至M10，产品等级为A。如果在某些情况下需要其他规格，可以从ISO？3506？1，以及ISO的尺寸选项？888或ISO 4753。笔记？1？降低的负载能力（与本文件中规定的六小叶套筒的穿透相结合的沉头尺寸相关）意味着极限拉伸载荷的限制，由特定标记（性能等级前为零）表示。头部的负载能力假设为80？线程中所有大小和所有属性类的%；见表？3.笔记？2？ISO中规定了具有完全负载能力的六角内六角沉头螺钉（高头）？14582，但这些产品是不可互换的，因为头部高度不同。笔记？3？需要特别注意确保埋头孔头部与组件中埋头孔的支承表面对齐。

This document specifies the characteristics of hexalobular socket countersunk flat head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M10, and with product grade A.

If in certain cases other specifications are requested, stainless steel grades can be selected from ISO 3506？1, and dimensional options from ISO 888 or ISO 4753.

NOTE 1   The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexalobular 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 3.

NOTE 2   Hexalobular socket countersunk head screws (high head), with full loadability are specified in ISO 14582, but these products are not interchangeable, because of different head heights.

NOTE 3   Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.

标准预览图