Chinese Standard: GB/T 80-2007

Hexagon socket set screws with cup point

MOD  ISO 4029:2003

全国紧固件标准化技术委员会(SAC/TC 85)

本标准规定了螺纹规格为M1.6~M24,性能等级为45H、A112H、A221H、A321H、A421H、A521H、CU2、CU3和AL4，产品等级为A级的内六角凹端紧定螺钉。
如需其他技术要求，应从现行标准（如GB／T　193、GB／T　3098.3、GB／T　9145、GB／T　3098.16和GB／T　3103.1）中选择。

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