丝锥和钻头的参数对照表公制粗牙螺纹 螺纹尺寸 钻头直 径 0.75 0.85 0.95 1.1 1.25 1.45 1.6 1.75 2.1 2.5 2.9 3.3 3.8 4.2 5 6 6.8 7.8 8.5 9.5 10.3 12 14 15.5 17.5 19.5 21 24 26.5 29.5 32 35 37.5 40.5 43 崁合度区分:中 2 级 下孔径 0.78 (80%) 0.88 (80%) 0.98 (80%) 1.14 (80%) 1.32 (75%) 1.52 (75%) 1.65 (80%) 1.83 (75%) 2.13 (75%) 2.59 (75%) 3.01 (75%) 3.39 (80%) 3.85 (80%) 4.31 (80%) 5.13 (80%) 6.13 (80%) 6.85 (85%) 7.85 (85%) 8.62 (85%) 9.62 (85%) 10.40 (85%) 12.2 (85%) 14.2 (85%) 15.7 (85%) 17.7 (85%) 19.2 (85%) 21.2 (85%) 24.2 (85%) 26.6 (90%) 29.6 (90%) 32.1 (90%) 35.1 (90%) 37.6 (90%) 40.6 (90%) 43.1 (90%) JIS B 0209-1982