公制英制螺纹对照表

崁合度區分：中(注1)2級(注2) 下孔徑
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%)
螺紋下孔徑表
公制細牙螺紋
螺紋尺寸
鑽頭直徑
崁合度區分：中(注1)2級(注2) 下孔徑
M 26 × 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
46.5
50 × 3
47
50 × 2
48
50 × 1.5 註(1)等級：6H
48.5
(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%)
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
JIS B 0211-1982(單位：mm) 崁合度區分：中(註1)2級(註2)
內螺紋小徑
最小直徑
最大直徑
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
(單位：mm) 內螺紋小徑
最小直徑
1.425 1.695 1.941 2.157 2.487 2.642 3.302 3.683 4.344 4.979 6.401 7.798 9.144 10.592 11.989 13.386 16.307 19.177 21.971 24.638 27.813 30.353 33.528 38.964 44.679
最大直徑
1.582 1.871 2.146 2.385 2.697 2.895 3.530 3.962 4.597 5.257 6.731 8.153 9.550 11.023 12.446 13.868 16.840 19.761 22.606 25.349 28.524 31.115 34.290 39.827 45.593
(單位：mm) 內螺紋小徑
最小直徑
1.182 1.474 1.756 2.025 2.271 2.551 2.820 3.404 3.963 4.496 5.360 6.782 8.382 9.729 11.329 12.751 14.351 17.323 20.270 23.114 26.289 29.464 32.639 35.814
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
48 × 2
46
48 × 1.5
45.835
46.210
46.376 46.752 47.835 48.376
46.676 47.252 48.210 48.676
螺紋下孔徑表
美制粗牙螺紋
螺紋尺寸
鑽頭直徑
Biblioteka Baidu
NO.1 -64UNC 2 -56 3 -48 4 -40 5 -40 6 -32 8 -32
10 -24 12 -24 1/4 -20 5/16 -18 3/8 -16 7/16 -14 1/2 -13 9/16 -12 5/8 -11 3/4 -10 7/8 - 9 1 -8 1 1/8 - 7 1 1/4 - 7 1 3/8 - 6 1 1/2 - 6 1 3/4 - 5 2 -4
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
46.62 (85%) 47.2 (85%) 48.2 (85%) 48.62 (85%)
JIS B 0211-1982(單位：mm) 崁合度區分：中(註1)2級(註2)
內螺紋小徑
最小直徑
最大直徑
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
1.55 1.8 2.1 2.3 2.6 2.8 3.4 3.9 4.5 5.1 6.6 8 9.4 10.8 12.2 13.6 16.5 19.5 22.2 25 28.2 30.8 34 39.5 45.2
2B 級 螺 紋 下孔徑
1.57 (65%) 1.86 (65%) 2.14 (65%) 2.36 (70%) 2.69 (70%) 2.86 (75%) 3.52 (75%) 3.91 (80%) 4.57 (80%) 5.25 (80%) 6.72 (80%) 8.15 (80%) 9.50 (80%) 11.0 (80%) 12.3 (85%) 13.8 (85%) 16.8 (80%) 19.6 (85%) 22.5 (85%) 25.2 (85%) 28.4 (85%) 31.0 (85%) 34.2 (85%) 39.8 (85%) 45.3 (90%)
螺紋下孔徑表
公制細牙螺紋
螺紋尺寸
鑽頭直徑
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
1.25 1.55 1.85 2.1 2.4 2.7 2.9 3.5 4.1 4.6 5.5 6.9 8.5 9.9 11.5 12.9 14.5 17.5 20.5 23.2 26.5 29.5 32.8 36
2B 級 螺 紋 下孔徑
1.30 (65%) 1.61 (65%) 1.90 (65%) 2.17 (70%) 2.44 (70%) 2.74 (70%) 3.02 (70%) 3.59 (75%) 4.14 (80%) 4.70 (80%) 5.56 (80%) 7.02 (80%) 8.61 (80%) 10.01 (80%) 11.60 (80%) 13.07 (80%) 14.65 (80%) 17.59 (85%) 20.6 (85%) 23.5 (85%) 26.7 (80%) 29.9 (80%) 33.0 (85%) 36.2 (85%)
螺紋下孔徑表
美制細牙螺紋
螺紋尺寸
鑽頭直徑
NO. 0 -80UNF
1 -72 2 -64 3 -56
4 -48 5 -44 6 -40 8 -36 10 -32 12 -28
1/4 -28 5/16 -24
3/8 -24 7/16 -20
1/2 -20 9/16 -18
5/8 -18 3/4 -16 7/8 -14 1 -12 11/8 -12 11/4 -12 13/8 -12 11/2 -12
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