탭가공을 위한 드릴규격표 (미터보통나사)나사드릴경호칭피치정밀(100%)일반(90%)헐거움(85%)M10.250.730.760.77M1.20.250.930.960.97M1.40.31.081.111.12M20.41.571.611.63M2.50.452.012.062.09M30.52.462.512.54M3.50.62.852.922.95M40.73.243.323.36M4.50.752.693.773.81M50.84.134.224.26M614.925.035.08M715.926.036.08M81.256.656.786.85M91.257.657.787.85M101.58.388.548.62M111.59.389.549.62M121.7510.110.310.4M14211.812.112.2M16213.814.114.2M182.51..