螺紋下孔徑表(標準牙) 公制粗牙螺紋 JIS B0209-1982（單位：mm）
|
螺紋尺寸
|
鑽頭直徑
|
崁合度區分：中(注 1)2 級(注 2)
下孔徑
|
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
|
|
M 1 × 0.25
|
0.75
|
0.78 (80%)
|
0.729
|
0.785
|
|
1.1 × 0.25
|
0.85
|
0.88 (80%)
|
0.829
|
0.885
|
|
1.2 × 0.25
|
0.95
|
0.98 (80%)
|
0.929
|
0.985
|
|
1.4 × 0.3
|
1.1
|
1.14 (80%)
|
1.075
|
1.142
|
|
1.6 × 0.35
|
1.25
|
1.32 (75%)
|
1.221
|
1.321
|
|
1.8 × 0.35
|
1.45
|
1.52 (75%)
|
1.421
|
1.521
|
|
2 × 0.4
|
1.6
|
1.65 (80%)
|
1.567
|
1.679
|
|
2.2 × 0.45
|
1.75
|
1.83 (75%)
|
1.713
|
1.838
|
|
2.5 × 0.45
|
2.1
|
2.13 (75%)
|
2.013
|
2.138
|
|
3 × 0.5
|
2.5
|
2.59 (75%)
|
2.459
|
2.599
|
|
3.5 × 0.6
|
2.9
|
3.01 (75%)
|
2.850
|
3.010
|
|
4 × 0.7
|
3.3
|
3.39 (80%)
|
3.242
|
3.422
|
|
4.5 × 0.75
|
3.8
|
3.85 (80%)
|
3.688
|
3.878
|
|
5 × 0.8
|
4.2
|
4.31 (80%)
|
4.134
|
4.334
|
|
6 × 1
|
5
|
5.13 (80%)
|
4.917
|
5.153
|
|
7 × 1
|
6
|
6.13 (80%)
|
5.917
|
6.153
|
|
8 × 1.25
|
6.8
|
6.85 (85%)
|
6.647
|
6.912
|
|
9 × 1.25
|
7.8
|
7.85 (85%)
|
7.647
|
7.912
|
|
10 × 1.5
|
8.5
|
8.62 (85%)
|
8.376
|
8.676
|
|
11 × 1.5
|
9.5
|
9.62 (85%)
|
9.376
|
9.676
|
|
12 × 1.75
|
10.3
|
10.40 (85%)
|
10.106
|
10.441
|
|
14 × 2
|
12
|
12.2 (85%)
|
11.835
|
12.210
|
|
16 × 2
|
14
|
14.2 (85%)
|
13.835
|
14.210
|
|
18 × 2.5
|
15.5
|
15.7 (85%)
|
15.294
|
15.744
|
|
20 × 2.5
|
17.5
|
17.7 (85%)
|
17.294
|
17.744
|
|
22 × 2.5
|
19.5
|
19.2 (85%)
|
19.294
|
19.744
|
|
24 × 3
|
21
|
21.2 (85%)
|
20.752
|
21.252
|
|
27 × 3
|
24
|
24.2 (85%)
|
23.752
|
24.252
|
|
30 × 3.5
|
26.5
|
26.6 (90%)
|
26.211
|
26.771
|
|
33 × 3.5
|
29.5
|
29.6 (90%)
|
29.211
|
29.771
|
|
36 × 4
|
32
|
32.1 (90%)
|
31.670
|
32.270
|
|
39 × 4
|
35
|
35.1 (90%)
|
34.670
|
35.270
|
|
42 × 4.5
|
37.5
|
37.6 (90%)
|
37.129
|
37.799
|
|
45 × 4.5
|
40.5
|
40.6 (90%)
|
40.129
|
40.799
|
|
48 × 5
|
43
|
43.1 (90%)
|
42.587
|
43.297
|
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
螺紋下孔徑表 公制粗牙螺紋 JIS B0209-1982（單位：mm）
|
螺紋尺寸
|
鑽頭直徑
|
崁合度區分：中(注 1)2 級(注 2)
下孔徑
|
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
|
|
M 2.5 × 0.35
|
2.2
|
2.22 (75%)
|
2.121
|
2.221
|
|
3 × 0.35
|
2.7
|
2.72 (75%)
|
2.621
|
2.721
|
|
3.5 × 0.35
|
3.2
|
3.22 (75%)
|
3.121
|
3.221
|
|
4 × 0.5
|
3.5
|
3.59 (75%)
|
3.459
|
3.599
|
|
4.5 × 0.5
|
4
|
4.09 (75%)
|
3.959
|
4.099
|
|
5 × 0.5
|
4.5
|
4.59 (75%)
|
4.459
|
4.599
|
|
5.5 × 0.5
|
5
|
5.09 (75%)
|
4.959
|
5.099
|
|
6 × 0.75
|
5.3
|
5.35 (80%)
|
5.188
|
5.378
|
|
7 × 0.75
|
6.3
|
6.35 (80%)
|
6.188
|
6.378
|
|
8 × 1
|
7
|
7.13 (80%)
|
6.917
|
7.153
|
|
8 × 0.75
|
7.3
|
7.35 (80%)
|
7.188
|
7.378
|
|
9 × 1
|
8
|
8.13 (80%)
|
7.917
|
8.153
|
|
9 × 0.75
|
8.3
|
8.35 (80%)
|
8.188
|
8.378
|
|
10 × 1.25
|
8.8
|
8.85 (85%)
|
8.647
|
8.912
|
|
10 × 1
|
9
|
9.13 (80%)
|
8.917
|
9.153
|
|
10 × 0.75
|
9.3
|
9.35 (80%)
|
9.188
|
9.378
|
|
11 × 1
|
10
|
10.13 (80%)
|
9.917
|
10.153
|
|
11 × 0.75
|
10.3
|
10.35 (80%)
|
10.188
|
10.378
|
|
12 × 1.5
|
10.5
|
10.62 (85%)
|
10.376
|
10.676
|
|
12 × 1.25
|
10.8
|
10.85 (85%)
|
10.647
|
10.912
|
|
12 × 1
|
11
|
11.13 (80%)
|
10.917
|
11.153
|
|
14 × 1.5
|
12.5
|
12.62 (85%)
|
12.376
|
12.676
|
|
14 × 1
|
13
|
13.13 (80%)
|
12.917
|
13.153
|
|
15 × 1.5
|
13.5
|
13.62 (85%)
|
13.376
|
13.676
|
|
15 × 1
|
14
|
14.13 (80%)
|
13.917
|
14.153
|
|
16 × 1.5
|
14.5
|
14.62 (85%)
|
14.376
|
14.676
|
|
16 × 1
|
15
|
15.13 (80%)
|
14.917
|
15.153
|
|
17 × 1.5
|
15.5
|
15.62 (85%)
|
15.376
|
15.676
|
|
17 × 1
|
16
|
16.13 (80%)
|
15.917
|
16.153
|
|
18 × 2
|
16
|
16.2 (85%)
|
15.835
|
16.210
|
|
18 × 1.5
|
16.5
|
16.62 (85%)
|
16.376
|
16.676
|
|
18 × 1
|
17
|
17.13 (80%)
|
16.917
|
17.153
|
|
20 × 2
|
18
|
18.2 (85%)
|
17.835
|
18.210
|
|
20 × 1.5
|
18.5
|
18.62 (85%)
|
18.376
|
18.676
|
|
20 × 1
|
19
|
19.13 (80%)
|
18.917
|
19.153
|
|
22 × 2
|
20
|
20.2 (85%)
|
19.835
|
20.210
|
|
22 × 1.5
|
20.5
|
20.62 (85%)
|
20.376
|
20.676
|
|
22 × 1
|
21
|
21.13 (80%)
|
20.917
|
21.153
|
|
24 × 2
|
22
|
22.2 (85%)
|
21.835
|
22.210
|
|
24 × 1.5
|
22.5
|
22.62 (85%)
|
22.376
|
22.676
|
|
24 × 1
|
23
|
23.13 (80%)
|
22.917
|
23.153
|
|
25 × 2
|
23
|
23.2 (85%)
|
22.835
|
23.210
|
|
25 × 1.5
|
23.5
|
23.62 (85%)
|
23.376
|
23.676
|
|
25 × 1
|
24
|
24.13 (80%)
|
23.917
|
24.153
|
|
M 26 × 1.5
|
24.5
|
24.62 (85%)
|
24.376
|
24.676
|
|
27 × 2
|
25
|
25.2 (85%)
|
24.835
|
25.210
|
|
27 × 1.5
|
25.5
|
25.62 (85%)
|
25.376
|
25.676
|
|
27 × 1
|
26
|
26.13 (80%)
|
25.917
|
26.153
|
|
28 × 2
|
26
|
26.2 (85%)
|
25.835
|
26.210
|
|
28 × 1.5
|
26.5
|
26.62 (85%)
|
26.376
|
26.676
|
|
28 × 1
|
27
|
27.13 (80%)
|
26.917
|
27.153
|
|
30 × 3
|
27
|
27.2 (85%)
|
26.752
|
27.252
|
|
30 × 2
|
28
|
28.2 (85%)
|
27.835
|
28.210
|
|
30 × 1.5
|
28.5
|
28.62 (85%)
|
28.376
|
28.676
|
|
30 × 1
|
29
|
29.13 (80%)
|
28.917
|
29.153
|
|
32 × 2
|
30
|
30.2 (85%)
|
29.835
|
30.210
|
|
32 × 1.5
|
30.5
|
30.62 (85%)
|
30.376
|
30.676
|
|
33 × 3
|
30
|
30.2 (85%)
|
29.752
|
30.252
|
|
33 × 2
|
31
|
31.2 (85%)
|
30.835
|
31.210
|
|
33 × 1.5
|
31.5
|
31.62 (85%)
|
31.376
|
31.676
|
|
35 × 1.5
|
33.5
|
33.62 (85%)
|
33.376
|
33.676
|
|
36 × 3
|
33
|
33.2 (85%)
|
32.752
|
33.252
|
|
36 × 2
|
34
|
34.2 (85%)
|
33.835
|
34.210
|
|
36 × 1.5
|
34.5
|
34.62 (85%)
|
34.376
|
34.676
|
|
38 × 1.5
|
36.5
|
36.62 (85%)
|
36.376
|
36.676
|
|
39 × 3
|
36
|
36.2 (85%)
|
35.752
|
36.252
|
|
39 × 2
|
37
|
37.2 (85%)
|
36.835
|
37.210
|
|
39 × 1.5
|
37.5
|
37.62 (85%)
|
37.376
|
37.676
|
|
40 × 3
|
37
|
37.2 (85%)
|
36.752
|
37.252
|
|
40 × 2
|
38
|
38.2 (85%)
|
37.835
|
38.210
|
|
40 × 1.5
|
38.5
|
38.62 (85%)
|
38.376
|
38.676
|
|
42 × 4
|
38
|
38.1 (90%)
|
37.670
|
38.270
|
|
42 × 3
|
39
|
39.2 (85%)
|
38.752
|
39.252
|
|
42 × 2
|
40
|
40.2 (85%)
|
39.835
|
40.210
|
|
42 × 1.5
|
40.5
|
40.62 (85%)
|
40.376
|
40.676
|
|
45 × 4
|
41
|
41.1 (90%)
|
40.670
|
41.270
|
|
45 × 3
|
42
|
42.2 (85%)
|
41.752
|
42.252
|
|
45 × 2
|
43
|
43.2 (85%)
|
42.835
|
43.210
|
|
45 × 1.5
|
43.5
|
43.62 (85%)
|
43.376
|
43.676
|
|
48 × 4
|
44
|
44.1 (90%)
|
43.670
|
44.270
|
|
48 × 3
|
45
|
45.2 (85%)
|
44.752
|
45.252
|
|
48 × 2
|
46
|
46.2 (85%)
|
45.835
|
46.210
|
|
48 × 1.5
|
46.5
|
46.62 (85%)
|
46.376
|
46.676
|
|
50 × 3
|
47
|
47.2 (85%)
|
46.752
|
47.252
|
|
50 × 2
|
48
|
48.2 (85%)
|
47.835
|
48.210
|
|
50 × 1.5
|
48.5
|
48.62 (85%)
|
48.376
|
48.676
|
註 (1)等級：6H (2)基於 JIS B 0211-1982 標準
螺紋下孔徑表 美致粗牙螺紋（單位：mm）
|
螺紋尺寸
|
鑽頭直徑
|
2B 級螺紋下孔徑
|
內螺紋小徑
|
|
最小直徑
|
最大直徑
|
|
NO.1 -64UNC
|
1.55
|
1.57 (65%)
|
1.425
|
1.582
|
|
2 -56
|
1.8
|
1.86 (65%)
|
1.695
|
1.871
|
|
3 -48
|
2.1
|
2.14 (65%)
|
1.941
|
2.146
|
|
4 -40
|
2.3
|
2.36 (70%)
|
2.157
|
2.385
|
|
5 -40
|
2.6
|
2.69 (70%)
|
2.487
|
2.697
|
|
6 -32
|
2.8
|
2.86 (75%)
|
2.642
|
2.895
|
|
8 -32
|
3.4
|
3.52 (75%)
|
3.302
|
3.530
|
|
10 -24
|
3.9
|
3.91 (80%)
|
3.683
|
3.962
|
|
12 -24
|
4.5
|
4.57 (80%)
|
4.344
|
4.597
|
|
1/4 -20
|
5.1
|
5.25 (80%)
|
4.979
|
5.257
|
|
5/16 -18
|
6.6
|
6.72 (80%)
|
6.401
|
6.731
|
|
3/8 -16
|
8
|
8.15 (80%)
|
7.798
|
8.153
|
|
7/16 -14
|
9.4
|
9.5 (80%)
|
9.144
|
9.550
|
|
1/2 -13
|
10.8
|
11.0 (80%)
|
10.592
|
11.023
|
|
9/16 -12
|
12.2
|
12.3 (85%)
|
11.989
|
12.446
|
|
5/8 -11
|
13.6
|
13.8 (85%)
|
13.386
|
13.868
|
|
3/4 -10
|
16.5
|
16.8 (80%)
|
16.307
|
16.840
|
|
7/8 - 9
|
19.5
|
19.6 (85%)
|
19.177
|
19.761
|
|
1 - 8
|
22.2
|
22.5 (85%)
|
21.971
|
22.606
|
|
1 1/8 - 7
|
25
|
25.2 (85%)
|
24.638
|
25.349
|
|
1 1/4 - 7
|
28.2
|
28.4 (85%)
|
27.813
|
28.524
|
|
1 3/8 - 6
|
30.8
|
31.0 (85%)
|
30.353
|
31.115
|
|
1 1/2 - 6
|
34
|
34.2 (85%)
|
33.528
|
34.290
|
|
1 3/4 - 5
|
39.5
|
39.8 (85%)
|
38.964
|
39.827
|
|
2 - 4
|
45.2
|
45.3 (90%)
|
44.679
|
45.593
|
螺紋下孔徑表 美制細牙螺紋（單位：mm）
|
螺紋尺寸
|
鑽頭直徑
|
2B 級螺紋下孔徑
|
內螺紋小徑
|
|
最小直徑
|
最大直徑
|
|
NO. 0-80UNF
|
1.25
|
1.30 (65%)
|
1.182
|
1.305
|
|
1 -72
|
1.55
|
1.61 (65%)
|
1.474
|
1.612
|
|
2 -64
|
1.85
|
1.90 (65%)
|
1.756
|
1.912
|
|
3 -56
|
2.1
|
2.17 (70%)
|
2.025
|
2.197
|
|
4 -48
|
2.4
|
2.44 (70%)
|
2.271
|
2.458
|
|
5 -44
|
2.7
|
2.74 (70%)
|
2.551
|
2.740
|
|
6 -40
|
2.9
|
3.02 (70%)
|
2.820
|
3.022
|
|
8 -36
|
3.5
|
3.59 (75%)
|
3.404
|
3.606
|
|
10 -32
|
4.1
|
4.14 (80%)
|
3.963
|
4.165
|
|
12 -28
|
4.6
|
4.70 (80%)
|
4.496
|
4.724
|
|
1/4 -28
|
5.5
|
5.56 (80%)
|
5.360
|
5.588
|
|
5/16 -24
|
6.9
|
7.02 (80%)
|
6.782
|
7.035
|
|
3/8 -24
|
8.5
|
8.61 (80%)
|
8.382
|
8.636
|
|
7/16 -20
|
9.9
|
10.01 (80%)
|
9.729
|
10.033
|
|
1/2 -20
|
11.5
|
11.60 (80%)
|
11.329
|
11.607
|
|
9/16 -18
|
12.9
|
13.07 (80%)
|
12.751
|
13.081
|
|
5/8 -18
|
14.5
|
14.65 (80%)
|
14.351
|
14.681
|
|
3/4 -16
|
17.5
|
17.59 (85%)
|
17.323
|
17.678
|
|
7/8 -14
|
20.5
|
20.6 (85%)
|
20.270
|
20.675
|
|
12
|
23.2
|
23.5 (85%)
|
23.114
|
23.571
|
|
1 1/8 -12
|
26.5
|
26.7 (80%)
|
26.289
|
26.746
|
|
1 1/4 -12
|
29.5
|
29.9 (80%)
|
29.464
|
29.921
|
|
1 3/8 -12
|
32.8
|
33.0 (85%)
|
32.639
|
33.096
|
|
1 1/2 -12
|
36
|
36.2 (85%)
|
35.814
|
36.271
|
螺紋下孔徑表 縫紉機螺紋（單位：mm）
|
螺紋尺寸
|
鑽頭直徑
|
2B 級螺紋下孔徑
|
2 級內螺紋小徑
|
|
最小直徑
|
最大直徑
|
|
SM 1/16 - 80
|
1.25
|
1.28 (75%)
|
1.211
|
1.281
|
|
5/64 - 64
|
1.55
|
1.57 (80%)
|
1.513
|
1.593
|
|
3/32 -100
|
2.10
|
2.15 (70%)
|
2.081
|
2.156
|
|
3/32 - 56
|
1.85
|
1.91 (80%)
|
1.841
|
1.936
|
|
1/8 - 44
|
2.50
|
2.58 (80%)
|
2.485
|
2.605
|
|
1/8 - 40
|
2.45
|
2.52 (80%)
|
2.421
|
2.551
|
|
9/64 - 40
|
2.85
|
2.91 (80%)
|
2.818
|
2.948
|
|
11/64 - 40
|
3.65
|
3.71 (80%)
|
3.612
|
3.742
|
|
3/16 - 32
|
3.90
|
3.94 (80%)
|
3.820
|
3.980
|
|
3/16 - 28
|
3.70
|
3.82 (80%)
|
3.684
|
3.844
|
|
7/32 - 32
|
4.70
|
4.73 (80%)
|
4.614
|
4.774
|
|
15/64 - 28
|
4.90
|
5.01 (80%)
|
4.875
|
5.055
|
|
1/4 - 40
|
5.60
|
5.69 (80%)
|
5.596
|
5.726
|
|
1/4 - 28
|
5.30
|
5.41 (80%)
|
5.272
|
5.452
|
|
1/4 - 24
|
5.10
|
5.25 (80%)
|
5.086
|
5.266
|
|
9/32 - 28
|
6.10
|
6.20 (80%)
|
6.066
|
6.256
|
|
9/32 - 20
|
5.70
|
5.82 (80%)
|
5.634
|
5.824
|
|
5/16 - 28
|
6.90
|
6.00 (80%)
|
6.860
|
7.050
|
|
5/16 - 24
|
6.70
|
6.84 (80%)
|
6.674
|
6.864
|
|
5/16 - 18
|
6.30
|
6.38 (85%)
|
6.254
|
6.444
|
|
3/8 - 28
|
8.50
|
8.58 (80%)
|
8.447
|
8.637
|
|
3/8 - 18
|
7.90
|
7.97 (85%)
|
7.843
|
8.053
|
|
7/16 - 28
|
10.10
|
10.17 (80%)
|
10.034
|
10.224
|
|
7/16 - 16
|
9.30
|
9.36 (85%)
|
9.220
|
9.440
|
|
1/2 - 28
|
11.70
|
11.76 (80%)
|
11.622
|
11.812
|
|
1/2 - 20
|
11.30
|
11.38 (80%)
|
11.190
|
11.410
|
|
1/2 - 12
|
10.30
|
10.36 (85%)
|
10.180
|
10.420
|
螺紋下孔徑表 英制粗牙螺紋（單位：mm）
|
螺紋尺寸
|
下 孔 徑
|
嵌 合 率
|
|
A 列(硬材質)
|
B 列(軟材質)
|
A 列直徑
|
B 列直徑
|
內螺紋最小徑
|
內螺紋最大徑
|
|
W 1/8
|
2.6
|
2.5
|
70.7
|
83.0
|
70.0
|
88.3
|
|
3/16
|
3.7
|
3.6
|
78.4
|
85.8
|
70.0
|
88.3
|
|
1/4
|
5.1
|
5.0
|
76.9
|
83.0
|
70.5
|
88.3
|
|
5/16
|
6.6
|
6.5
|
74.0
|
99.5
|
70.1
|
88.4
|
|
3/8
|
8.0
|
7.9
|
75.0
|
80.0
|
69.5
|
88.2
|
|
7/16
|
9.4
|
9.3
|
73.7
|
80.0
|
69.0
|
88.8
|
|
1/2
|
10.7
|
10.5
|
73.8
|
81.2
|
69.0
|
88.2
|
|
9/16
|
12.3
|
12.0
|
73.4
|
84.4
|
69.0
|
88.2
|
|
5/8
|
13.7
|
13.5
|
73.5
|
80.3
|
69.6
|
88.5
|
|
3/4
|
16.7
|
16.5
|
72.3
|
78.4
|
69.6
|
88.3
|
|
7/8
|
19.5
|
19.3
|
75.4
|
80.9
|
70.1
|
88.4
|
|
1
|
22.4
|
22.0
|
73.8
|
83.6
|
71.0
|
88.2
|
|
1 1/8
|
25.0
|
24.8
|
76.9
|
81.3
|
72.0
|
88.4
|
|
1 1/4
|
28.3
|
28.0
|
74.3
|
80.7
|
72.0
|
88.4
|
|
1 3/8
|
30.5
|
30.3
|
81.6
|
85.3
|
73.8
|
88.6
|
|
1 1/2
|
33.8
|
33.5
|
79.3
|
84.8
|
73.8
|
88.6
|
|
1 5/8
|
36.0
|
35.7
|
81.1
|
85.7
|
74.8
|
88.3
|
|
1 3/4
|
39.2
|
39.0
|
80.7
|
83.8
|
74.8
|
88.3
|
|
1 7/8
|
41.8
|
41.5
|
80.6
|
84.7
|
74.7
|
88.4
|
|
2
|
45.0
|
44.7
|
80.2
|
84.4
|
74.7
|
88.4
|
螺紋下孔徑表 英制管用螺紋（單位：mm）
|
管用螺紋尺寸
|
JIS B 0203
|
JIS B 2301
|
|
錐管內螺紋 Rc(PT)
|
平行內螺紋 Rp(PS)
|
錐管內螺紋
|
|
計 算 值
|
下 孔 徑
|
計 算 值
|
下 孔 徑
|
計 算 值
|
下 孔 徑
|
|
1/16
|
6.230
|
6.2
|
6.490
|
6.5
|
－
|
－
|
|
1/8
|
8.235
|
8.2
|
8.495
|
8.5
|
8.191
|
8.2
|
|
1/4
|
10.941
|
10.9
|
11.341
|
11.4
|
10.945
|
10.9
|
|
3/8
|
14.428
|
14.4
|
14.846
|
14.9
|
14.388
|
14.4
|
|
1/2
|
17.950
|
18
|
18.489
|
18.5
|
17.943
|
18
|
|
3/4
|
23.349
|
23
|
23.975
|
24
|
23.305
|
23
|
|
1
|
29.423
|
29
|
30.111
|
30
|
29.353
|
29
|
|
1 1/4
|
37.940
|
38
|
38.772
|
39
|
37.890
|
38
|
|
1 1/2
|
43.833
|
44
|
44.565
|
45
|
43.720
|
43
|
|
2
|
55.412
|
55
|
56.476
|
56
|
55.406
|
55
|
|
2 1/2
|
70.701
|
71
|
72.009
|
72
|
70.788
|
70
|
|
3
|
83.201
|
83
|
84.709
|
85
|
83.364
|
83
|
|
3 1/2
|
95.547
|
96
|
97.155
|
97
|
95.747
|
95
|
|
4
|
107.834
|
108
|
109.855
|
110
|
108.322
|
108
|
|
5
|
133.110
|
133
|
135.255
|
135
|
133.597
|
133
|
|
6
|
158.510
|
159
|
160.655
|
161
|
158.810
|
158
|
|
7
|
183.360
|
183
|
185.954
|
186
|
|
|
|
8
|
208.560
|
209
|
211.354
|
212
|
|
|
|
9
|
233.960
|
234
|
236.754
|
237
|
|
|
|
10
|
259.166
|
259
|
262.154
|
262
|
|
|
|
12
|
309.747
|
310
|
312.875
|
313
|
|
|
|
1982 年由於 ISO 進入，JIS 管用螺紋規格得到修訂，螺紋代號有了變更，但螺紋精度沒有改變。因此絲攻的名稱還是延用了舊代號。
JIS B 0202-1982
JIS B 0203-1982
|
|
|
總 類
|
舊 記 號
|
新 記 號
|
|
|
耐密用斜行母螺紋
|
PT
|
Rc
|
|
|
耐密用平行母螺紋
|
PS
|
Rp
|
|
|
機械連結用平行母螺紋
|
PF
|
G
|
|
螺紋下孔徑表 英制平行管用螺紋（單位：mm）
|
螺 紋
|
下 孔 徑
|
內螺紋小徑(參考)
|
|
尺 寸
|
大 徑
|
標準嵌合
高度 H
|
系 列
|
|
100
|
95
|
90
|
85
|
80
|
75
|
70
|
65
|
60
|
最小直徑
|
最大直徑
|
|
G 1/16
|
7.723
|
0.5808
|
6.56
|
6.62
|
6.68
|
6.74
|
6.79
|
6.85
|
6.91
|
6.97
|
7.03
|
6.843
|
6.561
|
|
G(PF)1/8
|
9.728
|
〞
|
8.57
|
8.62
|
8.68
|
8.74
|
8.80
|
8.86
|
8.92
|
8.97
|
9.03
|
8.848
|
8.566
|
|
1/4
|
13.157
|
0.8560
|
|
11.53
|
11.62
|
11.70
|
11.79
|
11.87
|
11.96
|
12.04
|
12.13
|
11.890
|
11.445
|
|
3/8
|
16.662
|
〞
|
14.95
|
15.04
|
15.12
|
15.21
|
15.29
|
15.38
|
15.46
|
15.55
|
15.64
|
15.395
|
14.950
|
|
1/2
|
20.955
|
1.1618
|
|
18.8
|
18.9
|
19.0
|
19.1
|
19.2
|
19.3
|
19.4
|
19.6
|
19.172
|
18.631
|
|
5/8
|
22.911
|
〞
|
20.6
|
20.7
|
20.8
|
20.9
|
21.0
|
21.2
|
21.3
|
21.4
|
21.5
|
21.130
|
20.589
|
|
3/4
|
26.441
|
〞
|
|
24.2
|
24.4
|
24.5
|
24.6
|
24.7
|
24.8
|
24.9
|
25.0
|
24.658
|
24.117
|
|
7/8
|
30.201
|
〞
|
27.9
|
28.0
|
28.1
|
28.2
|
28.3
|
38.5
|
28.6
|
28.7
|
28.8
|
28.418
|
27.877
|
|
1
|
33.249
|
14.786
|
30.3
|
30.4
|
30.6
|
30.7
|
30.9
|
31.0
|
31.2
|
31.3
|
31.5
|
30.931
|
30.291
|
|
1 1/8
|
37.897
|
〞
|
|
35.1
|
35.2
|
35.4
|
35.5
|
35.7
|
35.8
|
35.9
|
36.5
|
35.579
|
34.939
|
|
1 1/4
|
41.910
|
〞
|
39.0
|
39.1
|
39.2
|
39.4
|
39.6
|
39.7
|
39.8
|
40.0
|
40.1
|
39.592
|
38.952
|
|
1 3/8
|
44.323
|
〞
|
41.4
|
41.5
|
41.7
|
41.8
|
42.0
|
42.1
|
42.2
|
42.4
|
42.6
|
42.005
|
41.365
|
|
1 1/2
|
47.803
|
〞
|
|
45.0
|
45.1
|
45.3
|
45.4
|
45.6
|
45.7
|
45.9
|
46.0
|
45.485
|
49.023
|
|
1 5/8
|
51.910
|
〞
|
|
49.2
|
49.3
|
49.5
|
49.6
|
49.8
|
49.9
|
50.0
|
50.2
|
49.672
|
50.788
|
|
1 3/4
|
53.746
|
〞
|
50.8
|
50.9
|
51.1
|
51.2
|
51.4
|
51.5
|
51.7
|
52.0
|
52.0
|
51.428
|
56.656
|
|
2
|
59.614
|
〞
|
|
56.8
|
57.0
|
57.1
|
57.2
|
57.4
|
57.5
|
57.8
|
57.8
|
57.296
|
|
使用粗線左側數據作為攻絲前的底孔直徑，可加工符合 JIS B 0202 的 A 級或 B 級的內螺紋小徑。
螺紋下孔徑表 美制斜行管用螺紋 (NPT‧NPS) (單位：mm)
|
管用螺紋尺寸
|
斜行螺紋(NPT)
|
平行螺紋(NPS)
|
|
鑽頭直徑
|
鑽頭直徑
|
|
使用鉸刀場合
|
不使用鉸刀場合
|
|
1/16
|
－
|
0.234 ( 5.94)
|
|
0.246 ( 6.15)
|
1/4
|
0.250 ( 6.35)
|
|
1/8
|
21/64
|
0.328 ( 8.33)
|
－
|
0.332 ( 8.43)
|
11/32
|
0.344 ( 8.74)
|
|
1/4
|
27/64
|
0.422 (10.72)
|
7/16
|
0.438 (11.13)
|
7/16
|
0.438 (11.13)
|
|
3/8
|
9/16
|
0.562 (14.27)
|
9/16
|
0.562 (14.27)
|
37/64
|
0.578 (14.68)
|
|
1/2
|
11/16
|
0.688 (17.48)
|
45/64
|
0.703 (17.86)
|
23/32
|
0.719 (18.26)
|
|
3/4
|
57/64
|
0.891 (22.63)
|
29/32
|
0.906 (23.01)
|
59/64
|
0.922 (23.42)
|
|
1
|
1 1/8
|
1.125 (28.58)
|
1 9/64
|
1.141 (28.98)
|
1 5/32
|
1.156 (29.36)
|
|
1 1/4
|
1 15/32
|
1.469 (37.31)
|
1 31/64
|
1.484 (37.69)
|
1 1/2
|
1.500 (38.10)
|
|
1 1/2
|
1 1/16
|
1.703 (43.26)
|
1 23/32
|
1.719 (43.66)
|
1 3/4
|
1.750 (44.45)
|
|
2
|
2 11/64
|
2.172 (55.17)
|
2 3/16
|
2.188 (55.58)
|
2 7/32
|
2.219 (56.36)
|
上述鑽頭直徑來源於美制管用螺紋ANSI／ASME B1.20.1—1983 Pipe Threads, General Purpose (Inch)標準。
螺紋下孔徑表 美制管用耐密斜形螺紋(NPTF。NPSF)（單位：mm）
|
管用螺紋尺寸
|
斜行螺紋(NPTF)
|
平行螺紋(NPSF)
|
|
鑽頭直徑
|
鑽頭直徑
|
|
使用鉸刀場合
|
不使用鉸刀場合
|
|
1/16
|
－
|
0.234 ( 5.94)
|
|
0.246 ( 6.25)
|
1/4
|
0.250 ( 6.35)
|
|
1/8
|
21/64
|
0.328 ( 8.33)
|
－
|
0.339 ( 8.61)
|
11/32
|
0.344 ( 8.74)
|
|
1/4
|
27/64
|
0.422
(10.72)
|
7/16
|
0.438
(11.13)
|
－
|
0.444 (11.28)
|
|
3/8
|
9/16
|
0.562
(14.27)
|
37/64
|
0.578
(14.68)
|
37/64
|
0.578 (14.68)
|
|
1/2
|
11/16
|
0.688
(17.48)
|
45/64
|
0.703
(17.86)
|
23/32
|
0.719 (18.26)
|
|
3/4
|
57/64
|
0.891
(22.63)
|
59/64
|
0.922
(23.42)
|
－
|
0.922 (23.42)
|
|
1
|
1 1/8
|
1.125
(28.58)
|
1 5/32
|
1.156
(29.36)
|
1 5/32
|
1.156 (29.36)
|
|
1 1/4
|
1 15/32
|
1.469
(37.31)
|
1 1/2
|
1.500
(38.10)
|
－
|
－
|
|
1 1/2
|
1 45/64
|
1.703
(43.26)
|
1 47/64
|
1.734
(44.04)
|
－
|
－
|
|
2
|
2 3/16
|
2.188
(55.58)
|
2 7/32
|
2.219
(56.36)
|
－
|
－
|
|
2 1/2
|
2 19/32
|
2.594
(65.89)
|
2 41/64
|
2.641
(67.08)
|
－
|
－
|
上述鑽頭直徑來源於美制管用耐密斜行螺紋 ANSI B1.20.3—1957 Dryseal Pipe Threads (Inch)標準
螺紋下孔徑表(無屑絲攻用) 公制粗/細牙螺紋(NRT) (單位：mm)
|
螺紋尺寸
|
1 級螺紋用下孔徑
|
2 級螺紋用下孔徑
|
|
RH
精度
|
最小～最大
(嵌合率％)
|
RH
精度
|
最小～最大
(嵌合率％)
|
|
M 1 ×0.25
|
2
|
0.87 ~ 0.89 (100~85)
|
4
|
0.90 ~0.92 (100~80)
|
|
1.1×0.25
|
2
|
0.97 ~ 0.99 (100~85)
|
4
|
1.00 ~1.02 (100~80)
|
|
1.2×0.25
|
2
|
1.07 ~ 1.09 (100~85)
|
4
|
1.10 ~1.12 (100~80)
|
|
1.4×0.3
|
2
|
1.244~ 1.263 (100~85)
|
4
|
1.270~ 1.294 (100~80)
|
|
1.7×0.35
|
2
|
1.51 ~ 1.54 (100~80)
|
4
|
1.54 ~ 1.58 (100~75)
|
|
2 ×0.4
|
2
|
1.78 ~ 1.82 (100~80)
|
4
|
1.81 ~ 1.85 (100~75)
|
|
2.3×0.4
|
2
|
2.08 ~ 2.12 (100~80)
|
4
|
2.11 ~ 2.15 (100~75)
|
|
2.5×0.45
|
2
|
2.25 ~ 2.29 (100~80)
|
4
|
2.28 ~ 2.33 (100~75)
|
|
2.6×0.45
|
2
|
2.35 ~ 2.39 (100~80)
|
4
|
2.38 ~ 2.43 (100~75)
|
|
3 ×0.5
|
3
|
2.74 ~ 2.78 (100~80)
|
5
|
2.76 ~ 2.81 (100~75)
|
|
3.5×0.6
|
3
|
3.18 ~ 3.21 (100~85)
|
5
|
3.20 ~ 3.26 (100~75)
|
|
4 ×0.7
|
4
|
3.63 ~ 3.67 (100~85)
|
6
|
3.65 ~ 3.70 (100~85)
|
|
5 ×0.8
|
4
|
4.57 ~ 4.62 (100~85)
|
6
|
4.59 ~ 4.66 (100~80)
|
|
6 ×1
|
4
|
5.45 ~ 5.51 (100~85)
|
7
|
5.48 ~ 5.57 (100~80)
|
|
7 ×1
|
4
|
6.45 ~ 6.51 (100~85)
|
7
|
6.48 ~ 6.57 (100~80)
|
|
8 ×1.25
|
5
|
7.31 ~ 7.38 (100~85)
|
7
|
7.34 ~ 7.41 (100~85)
|
|
8 ×1
|
4
|
7.45 ~ 7.51 (100~85)
|
7
|
7.48 ~ 7.57 (100~80)
|
|
10 ×1.5
|
5
|
9.16 ~ 9.22 (100~90)
|
7
|
9.18 ~ 9.28 (100~85)
|
|
10 ×1.25
|
5
|
9.31 ~ 9.38 (100~85)
|
7
|
9.34 ~ 9.41 (100~85)
|
|
10 ×1
|
5
|
9.46 ~ 9.52 (100~85)
|
7
|
9.48 ~ 9.57 (100~80)
|
|
12 ×1.75
|
5
|
11.01 ~11.08 (100~90)
|
8
|
11.05 ~11.15
(100~85)
|
|
12 ×1.5
|
5
|
11.16 ~11.22 (100~90)
|
7
|
11.18 ~11.28 (100~85)
|
|
12 ×1.25
|
5
|
11.31 ~11.38 (100~85)
|
7
|
11.34 ~11.41
(100~85)
|
|
12 ×1
|
5
|
11.46 ~11.52 (100~85)
|
7
|
11.48 ~11.57
(100~80)
|
|
14 ×2
|
6
|
12.83 ~12.95 (100~90)
|
10
|
12.92 ~13.04 (100~85)
|
|
14 ×1.5
|
5
|
13.16 ~13.22 (100~90)
|
9
|
13.21 ~13.30 (100~85)
|
|
16 ×2
|
6
|
14.87 ~14.95 (100~90)
|
10
|
14.92 ~15.04 (100~85)
|
|
16 ×1.5
|
5
|
15.16 ~15.22 (100~90)
|
9
|
15.21 ~15.30 (100~80)
|
|
18 ×2.5
|
6
|
16.57 ~16.67 (100~90)
|
11
|
16.63 ~16.78 (100~85)
|
|
18 ×1.5
|
6
|
17.17 ~17.23 (100~90)
|
10
|
17.22 ~17.31 (100~85)
|
|
20 ×2.5
|
6
|
18.57 ~18.67 (100~90)
|
11
|
18.63 ~18.78 (100~85)
|
|
20 ×1.5
|
6
|
19.17 ~19.23 (100~90)
|
10
|
19.22 ~19.31 (100~85)
|
螺紋下孔徑表(無屑絲攻用) 公制粗/細牙螺紋(HRT) (單位：mm)
|
螺紋尺寸
|
1 級螺紋用下孔徑
|
2 級螺紋用下孔徑
|
|
RH
精 度
|
最小～最大
(嵌合率％)
|
RH
精 度
|
最小～最大
(嵌合率％)
|
|
M 1 ×0.25
|
2
|
0.858~0.879 (100~85)
|
4
|
0.858~0.887 (100~80)
|
|
1.2×0.25
|
2
|
1.058~1.079 (100~85)
|
4
|
1.058~1.087 (100~80)
|
|
1.4×0.3
|
2
|
1.23 ~1.26 (100~85)
|
4
|
1.23 ~1.26 (100~80)
|
|
1.6×0.35
|
2
|
1.40 ~1.44 (100~80)
|
4
|
1.40 ~1.45 (100~75)
|
|
1.7×0.35
|
－
|
1.50 ~1.54 (100~80)
|
4
|
1.50 ~1.55 (100~75)
|
|
1.8×0.35
|
2
|
1.60 ~1.64 (100~80)
|
4
|
1.60 ~1.65 (100~75)
|
|
2 ×0.4
|
2
|
1.77 ~1.82 (100~80)
|
4
|
1.77 ~1.82 (100~80)
|
|
2 ×0.25
|
2
|
1.858~1.887 (100~80)
|
－
|
1.858~1.887 (100~80)
|
|
2.3×0.4
|
－
|
2.07 ~2.12 (100~80)
|
4
|
2.07 ~2.13 (100~75)
|
|
2.5×0.45
|
3
|
2.24 ~2.30 (100~80)
|
5
|
2.24 ~2.31 (100~75)
|
|
2.6×0.45
|
－
|
2.34 ~2.40 (100~80)
|
5
|
2.34 ~2.41 (100~75)
|
|
3 ×0.6
|
3
|
2.72 ~2.73 (100~90)
|
5
|
2.66 ~2.73 (100~90)
|
|
3 ×0.5
|
5
|
2.72 ~2.77 (100~80)
|
6
|
2.72 ~2.78 (100~75)
|
|
3 ×0.35
|
3
|
2.80 ~2.84 (100~80)
|
5
|
2.80 ~2.85 (100~75)
|
|
3.5×0.6
|
3
|
3.16 ~3.21 (100~85)
|
5
|
3.16 ~3.25 (100~75)
|
|
4 ×0.75
|
3
|
3.57 ~3.64 (100~85)
|
6
|
3.57 ~3.64 (100~85)
|
|
4 ×0.7
|
6
|
3.60 ~3.66 (100~85)
|
7
|
3.60 ~3.66 (100~85)
|
|
4 ×0.5
|
3
|
3.71 ~3.77 (100~80)
|
6
|
3.71 ~3.79 (100~75)
|
|
5 ×0.9
|
3
|
4.49 ~4.59 (100~85)
|
7
|
4.49 ~4.59 (100~85)
|
|
5 ×0.8
|
3
|
4.55 ~4.62 (100~85)
|
8
|
4.55 ~4.64 (100~80)
|
|
5 ×0.5
|
3
|
2.72 ~4.77 (100~80)
|
6
|
4.72 ~4.79 (100~75)
|
|
6 ×1
|
4
|
5.43 ~5.52 (100~85)
|
7
|
5.43 ~5.55 (100~80)
|
|
6 ×0.75
|
3
|
5.57 ~5.64 (100~85)
|
7
|
5.57 ~5.66 (100~80)
|
螺紋下孔徑表(無屑絲攻用) 英制管用平行螺紋(NRT) (單位：mm)
|
螺紋尺寸
|
RH 精 度
|
最小～最大(嵌合率％)
|
|
PF 1/8
|
6
|
9.24~ 9.35 (100~80)
|
|
1/4
|
7
|
12.41~12.62 (100~75)
|
|
3/8
|
7
|
15.92~16.12 (100~75)
|
|
1/2
|
8
|
19.93~20.15 (100~80)
|
|
3/4
|
8
|
25.41~25.64 (100~80)
|
螺紋下孔徑表(無屑絲攻用) 美制細牙螺紋(NRT) (單位：mm)
|
螺紋尺寸
|
2B 級螺紋用下孔徑
|
3B 級螺紋用下孔徑
|
|
RH
精 度
|
最小～最大
(嵌合率％)
|
RH
精 度
|
最小～最大
(嵌合率％)
|
|
NO. 2-56UNC
|
4
|
1.96 ~ 2.02 (100~65)
|
3
|
1.95 ~ 2.01 (100~65)
|
|
3-48
|
4
|
2.25 ~ 2.32 (100~65)
|
3
|
2.23 ~ 2.31 (100~65)
|
|
4-40
|
5
|
2.52 ~ 2.60 (100~70)
|
3
|
2.50 ~ 2.58 (100~70)
|
|
5-40
|
5
|
2.86 ~ 2.93 (100~70)
|
3
|
2.83 ~ 2.91 (100~70)
|
|
6-32
|
5
|
3.09 ~ 3.17 (100~75)
|
3
|
3.06 ~ 3.14 (100~75)
|
|
8-32
|
6
|
3.75 ~ 3.83 (100~75)
|
4
|
3.74 ~ 3.82 (100~75)
|
|
10-24
|
6
|
4.26 ~ 4.35 (100~80)
|
4
|
4.24 ~ 4.32 (100~80)
|
|
12-24
|
6
|
4.92 ~ 5.01 (100~80)
|
4
|
4.90 ~ 4.96 (100~85)
|
|
1/4 -20
|
6
|
5.66 ~ 5.76 (100~80)
|
4
|
5.64 ~ 5.74 (100~80)
|
|
5/16 -18
|
7
|
7.18 ~ 7.29 (100~80)
|
5
|
7.15 ~ 7.24 (100~85)
|
|
3/8 -16
|
7
|
8.66 ~ 8.78 (100~80)
|
5
|
8.63 ~ 8.73 (100~85)
|
|
7/16 -14
|
7
|
10.11 ~10.25 (100~80)
|
5
|
10.08 ~10.19 (100~85)
|
|
1/2 -13
|
8
|
10.62 ~11.78 (100~80)
|
6
|
11.60 ~11.68 (100~90)
|
|
9/16 -12
|
10
|
13.14 ~13.27 (100~85)
|
8
|
13.11 ~13.24 (100~85)
|
|
5/8 -11
|
11
|
14.62 ~14.76 (100~85)
|
8
|
14.58 ~14.67 (100~90)
|
|
3/4 -10
|
12
|
17.67 ~17.88 (100~80)
|
9
|
17.63 ~17.74 (100~90)
|
|
7/8 - 9
|
12
|
20.68 ~20.85 (100~85)
|
9
|
20.64 ~20.75 (100~90)
|
|
1 - 8
|
13
|
23.65 ~23.84 (100~85)
|
10
|
23.61 ~23.74 (100~90)
|
螺紋下孔徑表(無屑絲攻用) 美制細牙螺紋(NRT) (單位：mm)
|
螺紋尺寸
|
2B 級螺紋用下孔徑
|
3B 級螺紋用下孔徑
|
|
RH
精 度
|
最小～最大
(嵌合率％)
|
RH
精 度
|
最小～最大
(嵌合率％)
|
|
NO. 2-64UNF
|
3
|
1.98 ~ 2.04 (100~65)
|
2
|
1.97 ~ 2.03 (100~65)
|
|
3-56
|
4
|
2.29 ~ 2.35 (100~65)
|
3
|
2.28 ~ 2.34 (100~65)
|
|
4-48
|
4
|
2.57 ~ 2.64 (100~70)
|
3
|
2.56 ~ 2.63 (100~70)
|
|
5-44
|
4
|
2.88 ~ 2.95 (100~70)
|
3
|
2.87 ~ 2.94 (100~70)
|
|
6-40
|
5
|
3.19 ~ 3.26 (100~70)
|
3
|
3.16 ~ 3.22 (100~75)
|
|
8-36
|
5
|
3.80 ~ 3.88 (100~75)
|
4
|
3.79 ~ 3.86 (100~75)
|
|
10-32
|
5
|
4.41 ~ 4.48 (100~80)
|
4
|
4.40 ~ 4.46 (100~80)
|
|
12-28
|
5
|
5.00 ~ 5.08 (100~80)
|
4
|
4.99 ~ 5.06 (100~80)
|
|
1/4 -28
|
5
|
5.86 ~ 5.93 (100~80)
|
4
|
5.85 ~ 5.92 (100~80)
|
|
5/16-24
|
6
|
7.38 ~ 7.46 (100~80)
|
5
|
7.36 ~ 7.43 (100~85)
|
|
3/8 -24
|
6
|
8.96 ~ 9.05 (100~80)
|
5
|
8.95 ~ 9.02 (100~85)
|
|
7/16-20
|
7
|
10.44 ~10.54 (100~80)
|
5
|
10.41 ~10.49 (100~85)
|
|
1/2 -20
|
7
|
12.02 ~12.12 (100~80)
|
5
|
12.00 ~12.05 (100~90)
|
|
9/16-18
|
9
|
13.55 ~13.66 (100~80)
|
7
|
13.53 ~13.58 (100~90)
|
|
5/8 -18
|
9
|
15.14 ~15.25 (100~80)
|
7
|
15.11 ~15.17 (100~90)
|
|
3/4 -16
|
10
|
18.22 ~18.32 (100~85)
|
7
|
18.18 ~18.25 (100~90)
|
|
7/8 -14
|
11
|
21.27 ~21.38 (100~85)
|
8
|
21.23 ~21.27 (100~95)
|
|
1 - 12
|
12
|
24.28 ~24.41 (100~85)
|
9
|
24.24 ~24.32 (100~90)
|
螺紋下孔徑表(護套螺紋用) 公制粗牙螺紋HL-NRT (單位：mm)
|
螺 紋 尺 寸
|
RH 精 度
|
最小～最大(嵌合率％)
|
|
M 3 ×0.5
|
3
|
3.39~3.43 (100~80)
|
|
4 ×0.7
|
4
|
4.54~4.58 (100~85)
|
|
5 ×0.8
|
4
|
5.61~5.66 (100~85)
|
|
6 ×1
|
4
|
6.75~6.81 (100~85)
|
|
8 ×1.25
|
5
|
8.93~9.01 (100~85)
|
|
10 ×1.5
|
5
|
11.11~11.17 (100~90)
|
|
10 ×1.25
|
5
|
10.93~11.01 (100~85)
|
|
12 ×1.75
|
5
|
13.28~13.17 (100~90)
|
|
12 ×1.5
|
5
|
13.11~13.17 (100~90)
|
|
12 ×1.25
|
5
|
12.93~13.01 (100~85)
|
螺紋下孔徑表(護套螺紋用) 公制粗牙螺紋 (單位：mm)
|
螺 紋 尺 寸
|
下 孔 徑
|
鑽 頭 直 徑
|
|
最小直徑
|
最大直徑
|
|
M 2.5 × 0.45
|
2.60
|
2.65
|
2.6
|
|
2.6 × 0.45
|
2.70
|
2.75
|
2.7
|
|
3 × 0.5
|
3.12
|
3.20
|
3.1
|
|
4 × 0.7
|
4.17
|
4.30
|
4.2
|
|
5 × 0.8
|
5.16
|
5.33
|
5.2
|
|
6 × 1
|
6.25
|
6.42
|
6.3
|
|
8 × 1.25
|
8.31
|
8.52
|
8.4
|
|
10 × 1.5
|
10.37
|
10.62
|
10.5
|
|
12 × 1.75
|
12.43
|
12.73
|
12.5
|
|
14 × 2
|
14.49
|
14.83
|
14.5
|
|
16 × 2
|
16.49
|
16.83
|
16.5
|
|
18 × 2.5
|
18.58
|
19.04
|
19.0
|
|
20 × 2.5
|
20.58
|
21.04
|
21.0
|
|
22 × 2.5
|
22.58
|
23.04
|
23.0
|
|
24 × 2.5
|
24.70
|
25.25
|
25.0
|
螺紋下孔徑表(護套螺紋用) 美制細牙螺紋 (單位：mm)
|
螺 紋 尺 寸
|
下 孔 徑
|
鑽 頭 直 徑
|
|
最小直徑
|
最大直徑
|
|
M 10 × 1
|
10.25
|
10.42
|
10.3
|
|
10 × 1.25
|
10.31
|
10.52
|
10.4
|
|
12 × 1.25
|
12.31
|
12.52
|
12.5
|
|
12 × 1.5
|
12.37
|
12.62
|
12.5
|
|
14 × 1.5
|
14.37
|
14.62
|
14.5
|
|
16 × 1.5
|
16.37
|
16.62
|
16.5
|
|
18 × 1.5
|
18.37
|
18.62
|
18.5
|
|
20 × 1.5
|
20.37
|
20.62
|
20.5
|
|
20 × 2
|
20.47
|
20.83
|
20.5
|
|
22 × 1.5
|
22.37
|
22.62
|
22.5
|
|
24 × 1.5
|
24.37
|
24.62
|
24.5
|
|
24 × 2
|
24.47
|
24.83
|
24.5
|
|
30 × 1.5
|
30.37
|
30.62
|
30.5
|
螺紋下孔徑表(護套螺紋用) 美制粗牙螺紋 (單位：mm)
|
螺 紋 尺 寸
|
下 孔 徑
|
鑽 頭 直 徑
|
|
最小直徑
|
最大直徑
|
|
NO. 2 – 56UNC
|
2.29
|
2.39
|
2.3
|
|
3 – 48
|
2.64
|
2.74
|
2.7
|
|
4 – 40
|
2.95
|
3.07
|
3.0
|
|
5 – 40
|
3.25
|
3.38
|
3.3
|
|
6 – 32
|
3.66
|
3.81
|
3.7
|
|
8 – 32
|
4.32
|
4.47
|
4.4
|
|
10 – 24
|
5.05
|
5.21
|
5.1
|
|
12 – 24
|
5.61
|
5.77
|
5.7
|
|
1/4 – 20
|
6.63
|
6.78
|
6.7
|
|
5/16 – 8
|
8.33
|
8.48
|
8.4
|
|
3/8 – 16
|
9.91
|
10.11
|
10.0
|
|
7/16 – 14
|
11.51
|
11.76
|
11.5
|
|
1/2 – 13
|
13.08
|
13.34
|
13.1
|
|
9/16 – 12
|
14.68
|
14.94
|
14.7
|
螺紋下孔徑表(護套螺紋用) 美制細牙螺紋 (單位：mm)
|
螺 紋 尺 寸
|
下 孔 徑
|
鑽 頭 直 徑
|
|
最小直徑
|
最大直徑
|
|
NO. 4 – 48UNF
|
2.97
|
3.05
|
3.0
|
|
6 – 40
|
3.66
|
3.78
|
3.7
|
|
8 – 36
|
4.32
|
4.44
|
4.4
|
|
10 – 32
|
4.98
|
5.13
|
5.0
|
|
1/4 – 28
|
6.53
|
6.71
|
6.6
|
|
5/16 – 24
|
8.20
|
8.38
|
8.2
|
|
3/8 – 24
|
9.78
|
9.96
|
9.8
|
|
7/16 – 20
|
11.43
|
11.63
|
11.5
|
|
1/2 – 20
|
13.03
|
13.26
|
13.1
|
|
9/16 – 18
|
14.66
|
14.88
|
14.7
|
|
5/8 – 18
|
16.26
|
16.48
|
16.3
|
|
3/4 – 16
|
19.43
|
19.68
|
19.5
|
|
7/8 – 14
|
22.61
|
22.86
|
22.7
|
|
1 – 12
|
25.76
|
26.04
|
26.0
|
|
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