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1、0 常用普通螺纹基本尺寸 标记示例: M24(公称直径为 24mm 的粗牙普通螺纹) ; M24X1.5(公称直径为 24mm,螺距为 1.5mm 的细牙普通螺纹) ; M24X1.5 左(公称直径为 24mm,螺距为 1.5mm,方向为左旋的细牙普通螺纹). 公称直径 D,d 第一系列第二系列 螺 距 P 中 径 D2 或 d2 小 径 D1 或 d1 0.250.8380.729 1 0.20.8700.783 0.250.9380.829 1.1 0.20.9700.883 0.251.0380.929 1.2 0.21.0700.983 0.31.2051.075 1.4 0.21.2
2、701.183 0.351.3731.221 1.6 0.21.4701.383 0.351.5731.421 1.8 0.21.6701.583 0.41.7401.567 2 0.251.8381.729 0.451.9081.713 2.2 0.252.0381.929 0.452.2082.013 2.5 0.352.2732.121 1 常用普通螺纹基本尺寸 公称直径 D,d 第一系列第二系列 螺 距 P 中 径 D2 或 d2 小 径 D1 或 d1 0.52.6752.459 3 0.352.7732.621 (0.6)3.1102.850 3.5 0.353.2733.121
3、0.73.5453.242 4 0.53.6753.459 (0.75)4.0133.688 4.5 0.54.1753.959 0.84.4804.134 5 0.54.6754.459 15.3504.917 0.755.5135.1886 (0.5)5.6755.459 1.257.1886.647 17.3506.917 0.757.5137.188 8 (0.5)7.6757.459 1.59.0268.376 1.259.1888.647 19.3508.917 0.759.5139.188 10 (0.5)9.6759.459 1.7510.86310.106 1.511.026
4、10.376 1.2511.18810.647 111.35010.917 0.7511.51311.188 12 (0.5)11.67511.459 212.70111.835 1.513.02612.376 (1.25)13.18812.647 113.35012.917 (0.75)13.51313.138 14 (0.5)13.67513.459 2 常用普通螺纹基本尺寸 公称直径 D,d 第一系列第二系列 螺 距 P 中 径 D2 或 d2 小 径 D1 或 d1 214.70113.835 1.515.02614.374 115.35014.917 (0.75)15.51315.1
5、88 16 0.515.67515.459 2.516.37615.294 216.70115.835 1.517.02616.376 117.35016.917 (0.75)17.51317.188 18 (0.5)17.67517.459 2.518.37617.294 218.70117.835 1.519.02618.376 119.35018.917 (0.75)19.51319.188 20 (0.5)19.67519.459 2.520.37619.294 220.70119.835 1.521.02620.376 121.35020.917 (0.75)21.51321.188
6、 22 (0.5)21.67521.459 322.05120.752 222.70121.835 1.523.02622.376 123.35022.917 24 (0.75)23.51323.188 325.05123.752 225.70124.835 1.526.02625.376 126.35025.917 27 (0.75)26.51326.188 3 常用普通螺纹基本尺寸 公称直径 D,d 第一系列第二系列 螺 距 P 中 径 D2 或 d2 小 径 D1 或 d1 3.527.72726.211 (3)28.05126.752 228.70127.835 1.529.02628
7、.376 129.35028.917 30 (0.75)29.51329.188 3.530.72729.211 (3)31.05129.752 231.70130.835 1.532.02631.376 132.35031.917 33 (0.75)32.51332.188 433.40231.670 334.05132.752 234.70133.835 1.535.02634.376 36 (1)35.35034.917 436.40234.670 337.05135.752 237.70136.835 1.538.02637.376 39 (1)38.35037.917 4.539.07737.129 (4)39.40237.670 340.05138.752 240.70139.835 1.541.02640.376 42 (1)41.35040.917 4.542.07740.129 (4)42.40240.670 343.05141.752 243.70142.835 1.544.02643.376 45 (1)44.35043.917