Chinese Standard: GB/T 28691-2012

High precision trapezoidal thread broaching tap

全国刀具标准化技术委员会(SAC/TC 91)

本标准规定了高精度梯形螺纹拉削丝锥的型式和尺寸、螺纹公差、技术要求、标志和包装的基本要求。
本标准适用于加工梯形螺纹（JB/T 2886-2008中7、8、9级非配作螺母)用的高精度梯形螺纹拉削丝锥（以下简称丝锥)。

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