規格, 螺距, 根徑/外徑, 內徑/根徑. M1*0.25, 0.25, 1, 0.729 ... M6*1.0, 1, 6, 4.917. M8*1.25, 1.25, 8, 6.647. M10*1.5, 1.5, 10, 8.376.
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