转造(挤压)攻丝用攻丝前下穴管控规格
尺寸及SPTE材质 SUS材质攻丝后内径(MAX)
螺纹直径牙距 t< t=~ t=~ t< t=~
平孔翻边孔平孔翻边孔平孔翻边孔平孔翻边孔平孔翻边孔
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☆切削攻丝攻丝前M3*(0/-)
攻丝后判定标准: ①螺纹规通端通,止端止
②螺纹孔内径按相对应最大标准棒规检查必须止
③螺纹的角度必须
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