挤压丝攻底孔纹公称尺寸MP推荐钻头直径D最小直径最大直径M20.41.831.811.85M2.20.452.001.982.03M2.50.452.302.282.33M30.52.782.762.81M40.73.683.653.70M50.84.634.594.66M615.535.485.57M716.536.486.57M81.257.397.347.41M817.537.487.57M101.59.249.189.28M101.259.399.349.41M1019.539.489.57螺纹公称尺寸MP推荐钻头直径D最小直径最大直径M121.7511.1211.0511.15M121.511.2411.1811.28M121.2511.3911.3411.41M14213.0012.9213.04M141.513.2713.2113.30M16215.0014.9215.04M161.515.2715.2115.30M182.516.7316.6316.78M181.517.2817.2217.31M202.518.7318.6318.78M20119.2819.2219.31