常用螺纹底孔尺寸表.doc

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1、.英制螺纹尺寸表英制尺寸公称直径底孔直径英制尺寸公称直径底孔直径SM1/4″×20Φ6.350Φ5.080　SM3/32″×56Φ2.381Φ1.928SM1/4″×24Φ6.350Φ5.290　SM7/32″×22Φ5.556Φ4.402SM1/4″×28Φ6.350Φ5.443　SM7/32″×32Φ5.556Φ4.763SM1/4″×40Φ6.350Φ5.705　SM9/32″×20Φ7.144Φ5.873SM1/8″×40Φ3.175Φ2.540　SM9/32″×28Φ7.144Φ6.237SM1/8″×44Φ3.175Φ2.598　SM11/32″×28Φ8

2、.731Φ7.824SM1/8″×48Φ3.175Φ2.646　SM3/64″×32Φ1.191Φ0.397SM3/8″×28Φ9.520Φ8.620　SM5/64″×64Φ1.984Φ1.511SM5/8″×28Φ15.87Φ14.957　SM9/64″×40Φ3.572Φ2.937SM3/16″×24Φ4.762Φ3.704　SM11/64″×32Φ4.366Φ3.572SM3/16″×32Φ4.762Φ3.957　SM11/64″×40Φ4.366Φ3.731SM3/16″×28Φ4.762Φ3.855　SM13/32″×32Φ5.519Φ4.366SM3/16

3、″×40Φ4.762Φ4.128　SM15/64″×28Φ5.953Φ5.046SM5/16″×18Φ7.938Φ6.526　SM17/64″×32Φ6.747Φ5.953SM5/16″×24Φ7.938Φ6.879　SM1/2″×28Φ12.70Φ11.792SM5/16″×28Φ7.938Φ7.030　SM1/2″×14Φ20.50Φ18.70英制内螺纹小径计算公式：螺纹直径×25.4-25.4/每英尺牙数例：11/64″×40=11/64×25.4-25.4/40=4.3656-0.635≈3.73公制螺纹尺寸表公制螺纹M1M2M2.5M3M3.5M4M4.5M

4、5M6M7M8M10M12M14M16粗牙螺距0.250.40.450.50.60.70.750.8111.31.51.7522钻头直径Φ0.75Φ1.6Φ2.05Φ2.5Φ2.9Φ3.3Φ3.75Φ4.2Φ5Φ6Φ6.7Φ8.5Φ10.2Φ11.9Φ13.9细牙螺距0.20.30.40.50.50.810.7511.250.751.51.2511.51.2511.51钻头直径0.81.82.73.54.55.277.298.79.210.510.71112.512.71314.51.5公、英制转换英寸值1/64″1/56″1/48″1/44″1/40″1/32″1/

5、28″公制值0.3970.4540.5290.5770.6350.7940.907英寸值1/24″1/20″1/18″1/16″1/8″1/4″1/2″公制值1.0581.271.4111.5883.1756.3512.7精选word范本！