Chinese Standard: GB/T 3506-2008

Machine taps with helical flutes

全国刀具标准化技术委员会(SAC/TC 91)

本标准规定了螺旋槽丝锥的型式尺寸、技术要求和标志包装的基本要求。
本标准适用于加工普通螺纹的机用螺旋槽丝锥，丝锥螺纹精度按H1、H2、H3三种公差带制造。

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