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1、精品文档普通螺纹基本尺寸(GB19681 摘录 )(mm)P8 0.866PP/8H/d2= 0.6495PHd60d1 =d1.0825 P、 内、外螺纹30HDd大径21P/22、d2内、外螺d ddD、 、 、纹中径D21411DDP/4/D、d 内、外螺H纹小径90P螺距标记示例：M20 6H公称直径 20 粗牙右旋内螺纹 , 中径和大径公差带均为 6HM20 6g公称直径 20 粗牙右旋外螺纹 , 中径和大径公差带为 6gM20 6H/6g( 上述规格的螺纹副)M202 左 5g 6g S公称直径 20、螺距 2 细牙左旋外螺纹, 中径和大径公差带分别为5g、 6g，短旋合长度公称直
2、径D、d螺距中径小径2 、21、1第一第二PDdDd系列系列30.52.6752.4590.352.7732.6213.5( 0.6)3.1102.8500.353.2733.12140.73.5453.2420.53.6753.4594.5(0.75)4.0133.6880.54.1753.95950.84.4804.1340.54.6754.459615.3504.9170.755.5135.1881.257.1886.647817.3506.9170.757.5137.1881.59.0268.376101.259.1888.64719.3508.9170.759.5139.1881.7
3、510.86310.106121.511.02610.3761.2511.18810.647111.35010.917212.70111.835141.513.02612.376113.35012.917214.70113.835161.515.02614.376115.35014.917182.516.37615.294216.70115.835公称直径螺D、d距中径小径第第2 、21、d1一二DdDP系系列列181.517.02616.376117.35016.9172.518.37617.29420218.70117.8351.519.02618.376119.35018.9172.52
4、0.37619.29422220.70119.8351.521.02620.376121.350.20.917322.05120.75224222.70121.8351.523.02622.376123.35022.917325.05123.75227225.70124.8351.526.02625.376126.35025.9173.527.72726.21130228.70127.8531.529.02628.376129.35028.9173.530.72729.21133231.70130.8351.532.02631.376433.40231.67036334.05132.75223
5、4.70133.8351.535.02634.37639436.40234.670337.05135.572公称直径D、d螺距中径小径第 第2、21、1一二PDdDd系 系列 列39237.70136.8351.538.02637.3764.539.07737.12942340.05138.752240.70139.8351.541.02640.3764.542.07740.12945343.05141.752243.70142.8351.544.02643.376444.75242.58748346.05144.752246.70145.8351.547.02646.376548.75246
6、.58752350.05148.752250.70149.8351.551.02650.3765.552.42850.046453.40251.67056354.05152.752254.70153.8351.555.02654.376(5.5)56.42854.046457.40255.67060 358.051 56.752258.701 57.8351.559.02658.376660.10357.50564 461.402 59.670362.051 60.752注： 1 “螺距 P”栏中第一个数值为粗牙螺距，其余为细牙螺距。2优先选用第一系列，其次第二系列，第三系列（表中未列出）尽可能不用。3括号内尺寸尽可能不用。1 欢迎下载精品文档欢迎您的下载，资料仅供参考！致力为企业和个人提供合同协议，策划案计划书， 学习资料等等打造全网一站式需求。2 欢迎下载