5 8.376 8.676 M27 X1 26.0 25.153 無屑絲攻(CRT) 螺紋下孔徑表. 公制螺紋Metric Screw Threads. 標稱. Nominalsize. 1級螺紋用下孔徑JIS class 1 drill hole dia. 2級螺紋 ...
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