Chinese Standard: GB/T 3227-2018

Assembly tools for screws and nuts—Driving squares for power socket tools

MOD  ISO 1174-2:1996

全国凿岩机械与气动工具标准化技术委员会(SAC/TC 173)

本标准规定了螺栓螺母用装配工具机动套筒工具的传动四方头和传动四方孔的型式、尺寸和标记。
本标准适用于螺栓螺母用装配工具机动套筒工具的传动四方，即传动四方头与传动四方孔（以下简称“方头与方孔”）。

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