ISO 7380-4-2026【PDF原文+中文翻译版】紧固件-低承载能力圆头螺钉 第4部分:带法兰内六角花形圆头螺钉

ISO 7380-4-2026【PDF原文+中文翻译版】

Fasteners - Button head screws with reduced loadability - Part 4: Hexalobular socket button head screws with collar

紧固件-低承载能力圆头螺钉 第4部分：带法兰内六角花形圆头螺钉

standard by International Organization for Standardization, 03/01/2026.

LANGUAGES: English+Chinese【英文原文+中文翻译】

Description

This document specifies the characteristics of hexalobular socket button head screws with collar with reduced loadability due to head design, in steel, with metric coarse pitch threads M3 to M12, and with product grade A.

If, in certain cases, other specifications are requested, property classes and stainless steel grades can be selected from ISO 898-1 or 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 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 4.

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