電動起子頭名稱形狀種類直徑(mm)詳細規格全長(mm) BT十字口螺絲用起子頭H4(4.0)起子頭呎寸序號#00螺絲直徑(mm)1.5旋轉軸型狀B40, 60, 80 #01.2B40 1.5B40,60,80 1.7B40,60,80 1.8B60 2.0B40,60,80,100,120 2.5B40,60,80,100,120 #13.0B40,60,80,100,120 4.0A40,60,80,100,120, 150,180,200 #24.0A40,60,80,100,120, 150 H5(5.0)#02.0B60 2.5B60,80,100,120 #13.0B40,60,80,100,120 5.0A40,60,80,100,120, 150,180,200,250,300 #25.0A40,60,80,100,120, 150,180,200,250, 300,400 #37.0B60,80,100,120 起子頭序號與螺絲直徑(M)的表示法#00 --> (M0.8 ~ M1.0) #2 --> (M3.0 ~ M5.0)#0 --> (M1.2 ~ M1.7) #3 --> (M6.0 ~ M8.0)#1 --> (M2.0 ~ M2.6) BS一字口螺絲用起子頭H4(4.0)刃寬(m/m)1.1刃厚(m/m)0.28旋轉軸型狀B60,80 1.3B60,80 1.50.3B40,60,80 1.7B40,60,80 1.80.4B60,80 2.0B40,60,80 2.3B60,80 2.5B40,60,80 2.8B60,80 3.0B40,60,80 4.00.6A40,60,80,100 H5(5.0)2.00.4B60 2.5B60 3.0B60,80 4.00.6B60 5.00.7B60,80,100,120,150,180 7.01.0B60 BH六角孔螺絲用起子頭H4(4.0)六角對邊(m/m)0.89, 1.5, 2.0, 3.060 1.2760,100 2.560,100,120 H5(5.0)1.2770 1.5, 3.0, 4.0, 6.070,100 2.0, 2.5, 5.070,100,120 BN螺母套筒(六角螺母用)H4(4.0)螺母對邊(m/m)2.3, 2.5, 3.040 4.0, 4.5, 5.0, 5.5,60 6.0, 7.0, 8.0, 9.060 10.060 H5(5.0)4.0, 4.5, 5.0, 5.5,60 6.0, 6.35, 7.060 8.080 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 17.080