缝纫机常用螺纹见表1-3。
表1-3缝纫机常用螺纹一览表
规格建议攻螺纹底孔规格建议攻螺纹底孔
3/32″(2.38125mm)-56牙/英寸
(0.4536mm)1.9mm
1/8″(3.175mm)-44牙/英寸
(0.5773mm)2.6mm
9/64″(3.57188mm)-40牙/英寸
(0.635mm)3.0mm
11/64″(4.36563mm)-40牙/英寸
(0.635mm)3.8mm
3/16″(4.7625mm)-28牙/英寸
(0.9071mm)3.9mm
3/16″(4.7625mm)-32牙/英寸
(0.7938mm)4.0mm
7/32″(5.55625mm)-32牙/英寸
(0.7938mm)4.7mm
1/4″(6.35mm)-40牙/英寸
(0.635mm)5.8mm
1/4″(6.35mm)-24牙/英寸
(1.0583mm)5.3mm
15/64″(5.9531mm)-28牙/英寸
(0.9071mm)5.1mm
9/32″(7.1486mm)-28牙/英寸
(0.9071mm)6.3mm
5/16″(7.9375mm)-18牙/英寸
(1.4111mm)6.6mm
5/16″(7.9375mm)-24牙/英寸
(1.0583mm)6.9mm
3/8″(9.525mm)-28牙/英寸
(0.9071mm)8.7mm
3/8″(9.525mm)-18牙/英寸
(1.4111mm)8.2mm
1/2″(12.7mm)-20牙/英寸(1.27mm)11.5mm
1/2″(12.7mm)-28牙/英寸
(0.9071mm)11.7mm
9/16″(14.2875mm)-20牙/英寸
(1.27mm)13.1mm
M2-0.41.6mm
M2.5-0.452.0mm
M3-0.52.5mm
M3.5-0.62.9mm
M4-0.73.3mm
M4-0.53.5mm
M5-0.84.2mm
M6-14.9mm
M6-0.755.2mm
M8-1.256.8mm
M8-17mm
M10-1.58.5mm
M10-18.9mm
M12-1.7510.2mm
M12-1.2510.7mm
M14-1.512.5mm
M16-1.514.5mm
注:参考公式为钻孔直径=公称直径-螺距+修正值。