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公制粗牙螺紋公制粗牙螺紋 JIS B 0209-1982(單位：單位：mm) 崁合度區分：中 2 級內螺紋小徑螺纹尺寸鑽頭直徑崁合度區分：中 2 級下孔徑最小直徑最大直徑3.5 0.62.93.01 (75%)2.8503.0104 0.73.33.39 (80%)3.2423.4224.5 0.753.83.85 (80%)3.6883.8785 0.84.24.31 (80%)4.1344.3346 155.13 (80%)4.9175.1537 166.13 (80%)5.9176.1538 1.256.86.85 (85%)6.6476.9129 1.257.87.85 (85%)7.6477.91210 1.58.58.62 (85%)8.3768.67611 1.59.59.62 (85%)9.3769.67612 1.7510.310.40 (85%)10.10610.44114 21212.2 (85%)11.83512.21016 21414.2 (85%)13.83514.21018 2.515.515.7 (85%)15.29415.74420 2.517.517.7 (85%)17.29417.74422 2.519.519.2 (85%)19.29419.744
