螺距中径
小径第一系列第二系列
第三系列
P D 2、d 2D 1、d 10.250.8380.7290.20.8700.7830.250.9380.8290.20.9700.8830.25 1.0380.9290.2 1.0700.9830.3 1.205 1.0750.2 1.270 1.1830.35 1.373 1.2210.2 1.470 1.3830.35 1.573 1.4210.2 1.670 1.5830.4 1.740 1.5670.25 1.838 1.7290.45 1.908 1.7130.25 2.038 1.9290.45 2.208 2.0130.35 2.273 2.1210.5 2.675 2.4590.35 2.773 2.621(0.6) 3.110 2.8500.35 3.273 3.1210.7 3.545 3.2420.5 3.675 3.459(0.75) 4.013 3.6880.5 4.175 3.9590.8 4.480 4.1340.5
4.675
4.459
1.1
普通螺纹的基本牙型及尺寸
公称直径D、d
1.0
1.6
1.4
1.2
4.0
2.0
2.55.0
1.8
2.2
3.5
4.5
3.0