精品资料，欢迎大家下载！以上资料仅供参考，如有侵权，留言删除！NPSM机械连接（白由配合）用直管内螺纹和外螺纹的尺寸管子公称尺寸每英寸牙数2A极外螺纹2B级内螺纹容隙大径中径小径中径最大最小最大最小最小最大最小a最大1234567891011:1/8270.00110.3970.3900.37250.36890.3580.3640.37360.37631/4180.00130.5260.5170.49030.48590.4680.4810.49160.49743/8180.00140.6620.6530.62560.62110.6030.6120.62700.6329:1/2140.00150.8230.8130.77690.77180.7470.7590.77840.78513/4140.00161.0341.0240.98730.98200.9580.9700.98890.99581111/20.00171.2931.2811.23691.23111.2011.2111.23861.2462111/4111/20.00181.6381.6261.58161.57561.5461.5551.58341.591211/2111/20.00181.8771.8651.82051.81441.7851.7941.82231.83022111/20.00192.3512.3392.29442.28822.2592.2682.29632.3044:21/280.00222.8412.8262.76002.75262.7082.7272.76222.7720380.00233.4673.4523.38623.37863.3343.3533.38853.398431/280.00233.9683.9533.88653.87883.8353.8483.88883.8988「480.00234.4664.4514.38484.37714.3334.3464.38714.3971580.00245.5285.5135.44695.43905.3955.4085.44935.4598680.00246.5856.5706.50366.49556.4526.4646.50606.5165（英制）a第10栏的数据与内螺纹的端面的根本中径E1是一样的（见
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关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
7.2第8栏）注：1.外螺纹的小径和内螺纹的大径是由商用直管螺纹板牙和商用磨制的直管螺纹丝锥加工形成的尺寸.外螺纹的大径是按削［平量为了0.10825P计算得到的,内螺纹的小径是按削平量为了0.31651P计算得到的,以保证产品采用符合8（d）节规定的量规检查时在牙顶和牙底处不发生干预.本表取自美国联邦螺纹标准
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