m30外螺纹,m30内螺纹

m30*2-6h(6h)配作螺纹怎么加工?外螺纹大径底径怎么算?
9级细牙外六角螺丝2mm幼牙螺栓m30*50x70x100x120x150x200x400
牙圆形板牙手用螺纹套丝扳牙m4m5m6m8m10m12m14m16m18m20 圆板牙m30*
6g外螺纹极限尺寸
单位:mm 螺纹规格d 牙距p b ds k s max min a b max min l≤125 125