攻牙下孔径对照表

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1、建議下孔徑   RecommendedTapDrillSizes◎公製牙NominalSizeDrillSize(mm)D1(mm) NominalSizeDrillSize(mm)D1(mm)Max.Min.Max.Min.M1   x0.25M1   x0.2M1.1x0.25M1.1x0.2M1.2x0.250.750.800.850.900.950.785(0.821)0.885(0.921)0.9850.729(0.783)0.829(0.883)0.929M6   x0.75*M6 x0.5M7   x1M7   x0.75*M7 x

2、0.55.35.56.06.36.55.3785.5506.1536.3786.5505.1185.4005.9176.1886.400M1.2x0.2M1.4x0.3M1.4x0.2M1.6x0.35M1.6x0.21.001.101.201.251.40(1.021)1.142(1.221)1.321(1.421)(0.983)1.075(1.183)1.221(1.383)M8   x1.25M8   x1M8   x0.75*M8 x0.5M9   x1.256.87.07.37.57.86.9127.1537.3787.5207.912

3、6.6476.9177.1887.4007.647M1.7x0.35*M1.7x0.2M1.8x0.35M1.8x0.2M2   x0.41.351.451.451.601.601.4211.5001.521(1.621)1.6791.3211.4601.421(1.583)1.567M9   x1M9   x0.75M10 x1.5M10 x1.25M10 x18.08.38.58.89.08.1538.3788.6768.9129.1537.9178.1888.3768.6478.917M2   x0.25M2.2x0.45M2.2x0.25

4、M2.3x0.4*M2.3x0.251.751.751.951.902.05(1.785)1.838(1.985)1.9792.061(1.729)1.713(1.929)1.8672.001M10 x0.75*M10x0.5M11 x1.5M11 x1M11 x0.759.39.59.510.010.39.3789.5209.67610.15310.3789.1889.4009.3769.91710.188M2.5x0.45M2.5x0.35M2.6x0.45*M2.6x0.35M3   x0.52.102.202.202.202.502.13

5、82.2212.2382.2462.5992.0132.1212.1132.1892.459M12 x1.75M12 x1.5M12 x1.25M12 x1*M12x0.510.310.510.811.011.510.44110.67610.91211.15311.52010.10610.37610.64710.91711.400M3   x0.35M3.5x0.6M3   x0.35M4   x0.7M4   x0.52.702.903.203.303.502.7213.0103.2213.4223.5992.6212.8503.1213.24

6、23.459M14 x2M14 x1.5M14 x1M15 x1.5M15 x112.012.513.013.514.012.21012.67613.15313.67614.15311.83512.37612.91713.37613.917M4.5x0.75M4.5x0.5M5   x0.8M5   x0.5M6   x13.804.004.204.505.003.8784.0994.3344.5995.1533.6883.9594.1344.4594.917M16 x2M16 x1.5M16 x1M17 x1.5M17 x114.014.515

7、.015.516.014.21014.67615.15315.67616.15313.83514.37614.91715.37615.917●ThereccommendedtapdrillsizesindicatedaboveareforJISClass2Metricthreads.●D1：MinordiameterofJISClass2internalthread.             But,theminordiametersD1shownin()areofJISClassIinternalthreads             beca

8、usetheirnominalsizesarenotspecifiedinJISClass2.●*Markedsizeshavebeen