螺紋下孔徑表
公制粗牙螺紋 JIS B 0209-1982(單位：mm) (註1)(註2) 崁合度區分：中2級崁合度區分：中(注1)2級(注2) 內螺紋小徑 螺紋尺寸 鑽頭直徑 下孔徑 最小直徑 最大直徑 M 1 × 0.25 0.75 0.78 (80%) 1.1 × 0.25 0.85 0.88 (80%) 1.2 × 0.25 0.95 0.98 (80%) 1.4 × 0.3 1.1 1.14 (80%) 1.6 × 0.35 1.25 1.32 (75%) 1.8 × 0.35 1.45 1.52 (75%) 2 × 0.4 1.6 1.65 (80%) 2.2 × 0.45 1.75 1.83 (75%) 2.5 × 0.45 2.1 2.13 (75%) 3 × 0.5 2.5 2.59 (75%) 3.5 × 0.6 2.9 3.01 (75%) 4 × 0.7 3.3 3.39 (80%) 4.5 × 0.75 3.8 3.85 (80%) 5 × 0.8 4.2 4.31 (80%) 6 × 1 5 5.13 (80%) 7 × 1 6 6.13 (80%) 8 × 1.25 6.8 6.85 (85%) 9 × 1.25 7.8 7.85 (85%) 10 × 1.5 8.5 8.62 (85%) 11 × 1.5 9.5 9.62 (85%) 12 × 1.75 10.3 10.40 (85%) 14 × 2 12 12.2 (85%) 16 × 2 14 14.2 (85%) 18 × 2.5 15.5 15.7 (85%) 20 × 2.5 17.5 17.7 (85%) 22 × 2.5 19.5 19.2 (85%) 24 × 3 21 21.2 (85%) 27 × 3 24 24.2 (85%) 30 × 3.5 26.5 26.6 (90%) 33 × 3.5 29.5 29.6 (90%) 36 × 4 32 32.1 (90%) 39 × 4 35 35.1 (90%) 42 × 4.5 37.5 37.6 (90%) 45 × 4.5 40.5 40.6 (90%) 48 × 5 43 43.1 (90%) 註(1)M1.4以下等級：5H、M1.6以上等級：6H (2)基於JIS B 0209-1982標準
0.729 0.829 0.929 1.075 1.221 1.421 1.567 1.713 2.013 2.459 2.850 3.242 3.688 4.134 4.917 5.917 6.647 7.647 8.376 9.376 10.106 11.835 13.835 15.294 17.294 19.294 20.752 23.752 26.211 29.211 31.670 34.670 37.129 40.129 42.587 0.785 0.885 0.985 1.142 1.321 1.521 1.679 1.838 2.138 2.599 3.010 3.422 3.878 4.334 5.153 6.153 6.912 7.912 8.676 9.676 10.441 12.210 14.210 15.744 17.744 19.744 21.252 24.252 26.771 29.771 32.270 35.270 37.799 40.799 43.297 螺紋下孔徑表
公制細牙螺紋 JIS B 0211-1982(單位：mm) (註1)(註2) 崁合度區分：中2級崁合度區分：中(注1)2級(注2) 內螺紋小徑 螺紋尺寸 鑽頭直徑 下孔徑 最小直徑 最大直徑 M 2.5 × 0.35 3 × 0.35 3.5 × 0.35 4 × 0.5 4.5 × 0.5 5 × 0.5 5.5 × 0.5 6 × 0.75 7 × 0.75 8 × 1 8 × 0.75 9 × 1 9 × 0.75 10 × 1.25 10 × 1 10 × 0.75 11 × 1 11 × 0.75 12 × 1.5 12 × 1.25 12 × 1 14 × 1.5 14 × 1 15 × 1.5 15 × 1 16 × 1.5 16 × 1 17 × 1.5 17 × 1 18 × 2 18 × 1.5 18 × 1 20 × 2 20 × 1.5 20 × 1 22 × 2 22 × 1.5 22 × 1 24 × 2 24 × 1.5 24 × 1 25 × 2 25 × 1.5 25 × 1
2.2 2.7 3.2 3.5 4 4.5 5 5.3 6.3 7 7.3 8 8.3 8.8 9 9.3 10 10.3 10.5 10.8 11 12.5 13 13.5 14 14.5 15 15.5 16 16 16.5 17 18 18.5 19 20 20.5 21 22 22.5 23 23 23.5 24 2.22 (75%) 2.72 (75%) 3.22 (75%) 3.59 (75%) 4.09 (75%) 4.59 (75%) 5.09 (75%) 5.35 (80%) 6.35 (80%) 7.13 (80%) 7.35 (80%) 8.13 (80%) 8.35 (80%) 8.85 (85%) 9.13 (80%) 9.35 (80%) 10.13 (80%) 10.35 (80%) 10.62 (85%) 10.85 (85%) 11.13 (80%) 12.62 (85%) 13.13 (80%) 13.62 (85%) 14.13 (80%) 14.62 (85%) 15.13 (80%) 15.62 (85%) 16.13 (80%) 16.2 (85%) 16.62 (85%) 17.13 (80%) 18.2 (85%) 18.62 (85%) 19.13 (80%) 20.2 (85%) 20.62 (85%) 21.13 (80%) 22.2 (85%) 22.62 (85%) 23.13 (80%) 23.2 (85%) 23.62 (85%) 24.13 (80%) 2.121 2.621 3.121 3.459 3.959 4.459 4.959 5.188 6.188 6.917 7.188 7.917 8.188 8.647 8.917 9.188 9.917 10.188 10.376 10.647 10.917 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917 15.835 16.376 16.917 17.835 18.376 18.917 19.835 20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917 2.221 2.721 3.221 3.599 4.099 4.599 5.099 5.378 6.378 7.153 7.378 8.153 8.378 8.912 9.153 9.378 10.153 10.378 10.676 10.912 11.153 12.676 13.153 13.676 14.153 14.676 15.153 15.676 16.153 16.210 16.676 17.153 18.210 18.676 19.153 20.210 20.676 21.153 22.210 22.676 23.153 23.210 23.676 24.153 螺紋下孔徑表
公制細牙螺紋 JIS B 0211-1982(單位：mm) (註1)(註2) 崁合度區分：中2級崁合度區分：中(注1)2級(注2) 內螺紋小徑 螺紋尺寸 鑽頭直徑 下孔徑 最小直徑 最大直徑 M26 × 1.5 27 × 2 27 × 1.5 27 × 1 28 × 2 28 × 1.5 28 × 1 30 × 3 30 × 2 30 × 1.5 30 × 1 32 × 2 32 × 1.5 33 × 3 33 × 2 33 × 1.5 35 × 1.5 36 × 3 36 × 2 36 × 1.5 38 × 1.5 39 × 3 39 × 2 39 × 1.5 40 × 3 40 × 2 40 × 1.5 42 × 4 42 × 3 42 × 2 42 × 1.5 45 × 4 45 × 3 45 × 2 45 × 1.5 48 × 4 48 × 3 48 × 2 24.5 25 25.5 26 26 26.5 27 27 28 28.5 29 30 30.5 30 31 31.5 33.5 33 34 34.5 36.5 36 37 37.5 37 38 38.5 38 39 40 40.5 41 42 43 43.5 44 45 46 48 × 1.5 46.5 50 × 3 47 50 × 2 48 50 × 1.5 48.5 註(1)等級：6H (2)基於JIS B 0211-1982標準
24.62 (85%) 25.2 (85%) 25.62 (85%) 26.13 (80%) 26.2 (85%) 26.62 (85%) 27.13 (80%) 27.2 (85%) 28.2 (85%) 28.62 (85%) 29.13 (80%) 30.2 (85%) 30.62 (85%) 30.2 (85%) 31.2 (85%) 31.62 (85%) 33.62 (85%) 33.2 (85%) 34.2 (85%) 34.62 (85%) 36.62 (85%) 36.2 (85%) 37.2 (85%) 37.62 (85%) 37.2 (85%) 38.2 (85%) 38.62 (85%) 38.1 (90%) 39.2 (85%) 40.2 (85%) 40.62 (85%) 41.1 (90%) 42.2 (85%) 43.2 (85%) 43.62 (85%) 44.1 (90%) 45.2 (85%) 46.2 (85%) 46.62 (85%) 47.2 (85%) 48.2 (85%) 48.62 (85%) 24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835 30.376 29.752 30.835 31.376 33.376 32.752 33.835 34.376 36.376 35.752 36.835 37.376 36.752 37.835 38.376 37.670 38.752 39.835 40.376 40.670 41.752 42.835 43.376 43.670 44.752 45.835 46.376 46.752 47.835 48.376 24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.252 28.210 28.676 29.153 30.210 30.676 30.252 31.210 31.676 33.676 33.252 34.210 34.676 36.676 36.252 37.210 37.676 37.252 38.210 38.676 38.270 39.252 40.210 40.676 41.270 42.252 43.210 43.676 44.270 45.252 46.210 46.676 47.252 48.210 48.676