No. 4 – 40, 0.635, 12, 3, 50, T. No. 5 – 40, 0.635, 12, 4, 50, T. No. 6 – 32, 0.794, 14, 4 ... 規格, Pitch 牙距 mm, Thread Length 螺紋有效長 mm, Shank Diameter 柄 ...
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