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1、常用普通螺紋基本尺寸標(biāo)記示例：M24（公稱直徑為24mm的粗牙普通螺紋）；M24X1.5（公稱直徑為24mm，螺距為1.5mm的細(xì)牙普通螺紋）；M24X1.5左（公稱直徑為24mm，螺距為1.5mm，方向?yàn)樽笮募?xì)牙普通螺紋）.公稱直徑D，d螺距P中徑D2或d2小徑D1或d1第一系列第二系列10.250.8380.7290.20.8700.7831.10.250.9380.8290.20.9700.8831.20.251.0380.9290.21.0700.9831.40.31.2051.0750.21.2701.1831.60.351.
2、3731.2210.21.4701.3831.80.351.5731.4210.21.6701.58320.41.7401.5670.251.8381.7292.20.451.9081.7130.252.0381.9292.50.452.2082.0130.352.2732.1213常用普通螺紋基本尺寸公稱直徑D，d螺距P中徑D2或d2小徑D1或d1第一系列第二系列30.52.6752.4590.352.7732.6213.5（0.6）3.1102.8500.353.2733.12140.73.5453.2420.53.6753.4594
3、.5（0.75）4.0133.6880.54.1753.95950.84.4804.1340.54.6754.459615.3504.9170.755.5135.188（0.5）5.6755.45981.257.1886.64717.3506.9170.757.5137.188（0.5）7.6757.459101.59.0268.3761.259.1888.64719.3508.9170.759.5139.188（0.5）9.6759.459121.7510.86310.1061.511.02610.3761.2511.18810.647
4、111.35010.9170.7511.51311.188（0.5）11.67511.45914212.70111.8351.513.02612.376（1.25）13.18812.647113.35012.917（0.75）13.51313.138（0.5）13.67513.4593常用普通螺紋基本尺寸公稱直徑D，d螺距P中徑D2或d2小徑D1或d1第一系列第二系列16214.70113.8351.515.02614.374115.35014.917（0.75）15.51315.1880.515.67515.459182.516.376
5、15.294216.70115.8351.517.02616.376117.35016.917（0.75）17.51317.188（0.5）17.67517.459202.518.37617.294218.70117.8351.519.02618.376119.35018.917（0.75）19.51319.188（0.5）19.67519.459222.520.37619.294220.70119.8351.521.02620.376121.35020.917（0.75）21.51321.188（0.5）21.67521.4592432
6、2.05120.752222.70121.8351.523.02622.376123.35022.917（0.75）23.51323.18827325.05123.752225.70124.8351.526.02625.376126.35025.917（0.75）26.51326.1883常用普通螺紋基本尺寸公稱直徑D，d螺距P中徑D2或d2小徑D1或d1第一系列第二系列303.527.72726.211（3）28.05126.752228.70127.8351.529.02628.376129.35028.917（0.75）29.513
7、29.188333.530.72729.211（3）31.05129.752231.70130.8351.532.02631.376132.35031.917（0.75）32.51332.18836433.40231.670334.05132.752234.70133.8351.535.02634.376（1）35.35034.91739436.40234.670337.05135.752237.70136.8351.538.02637.376（1）38.35037.917424.539.07737.129（4）39.40237.6703
8、40.05138.752240.70139.8351.541.02640.376（1）41.35040.917454.542.07740.129（4）42.40240.670343.05141
