2024年2月22日发(作者：六娴淑)
本表所推选之钻头孔径,是针对攻牙加工时,能够很容易的了解钻孔直径；而依据市场售之标准钻头 所选所的.在使用钻头的情况下,由於钻头的形状及尺寸、精度、被钻孔之材质等,对於所钻孔的尺寸、 精度有很大的影响,所以使用本表之钻孔径,假设有不当之处,应视实际状况适当的变更钻头直径.本表是 依据2级牙制订.
公制粗螺纹
规格
M1.0X0.25
M1.1X0.25
M1.2X0.25
M1.4X0.3
M1.6X0.35
M1.7X0.35
M1.8X0.35
M2.0X0.4
M2.2X0.45
M2.3X0.4
M2.5X0.45
M2.6X0.45
M3.0X0.5
M3.0X0.6
M3.5X0.6
M4.0X0.7
M4.0X0.75
M4.5X0.75
M5.0X0.8
M5.0X0.9
M6.0X1.0
M7.0X1.0
M8.0X1.25
M9.0X1.25
M10X1.5
M11X1.5
M12X1.75
M14X2.0
M16X2.0
M18X2.5
M20X2.5
M22X2.5
标准径
最大
0.75
0.85
0.95
1.10
1.25
1.35
1.45
1.60
1.75
1.90
2.10
2.20
2.50
2.40
2.90
3.30
3.25
3.80
4.20
4.10
5.00
6.00
6.80
7.80
8.50
8.50
10.30
12.00
14.00
15.50
17.50
19.50
21.00
2级牙钻孔径
最小
0.729
0.829
0.929
1.075
1.221
1.321
1.421
1.567
1.713
1.867
2.013
2.113
2.459
2.280
2.850
3.242
3.106
3.688
4.134
3.930
4.917
5.917
6.647
7.647
8.376
8.376
10.106
11.835
13.835
15.294
17.294
19.294
20.752
0.785
0.885
0.985
1.142
1.321
1.421
1.521
1.679
1.838
1.979
2.138
2.238
2.599
2.440
3.010
3.422
3.326
3.878
4.334
4.170
5.153
6.153
6.912
7.912
8.676
8.676
10.441
12.210
14.210
15.744
17.744
19.744
21.252 M24X3.0
M27X3.0 24.00 24.252 23.752
Page 2 of 10
M30X3.5 26.50 26.771 26.211
公制细螺纹
规格
M1.0X0.2
M1.1X0.2
M1.2X0.2
M1.4X0.2
M1.6X0.2
M1.7X0.2
M1.8X0.2
M2.0X0.25
M2.2X0.25
M2.3X0.25
M2.5X0.35
M2.6X0.35
M3.0X0.35
M3.5X0.35
M4.0X0.5
M4.5X0.5
M5.0X0.5
M5.5X0.5
M6.0X0.75
M6.0X0.5
M7.0X0.75
M7.0X0.5
M8.0X1.0
M8.0X0.75
M8.0X0.5
M9.0X1.0
M9.0X0.75
M10X1.25
M10X1.0
标准径
最大
0.80
0.90
1.00
1.20
1.40
1.45
1.60
1.75
1.95
2.05
2.20
2.20
2.70
3.20
3.50
4.00
4.50
5.00
5.30
5.50
6.30
6.50
7.00
7.30
7.50
8.00
8.30
8.80
9.00
9.30
2级牙钻孔径
最小
0.783
0.883
.0983
1.183
1.383
1.460
1.583
1.729
1.929
2.001
2.121
2.186
2.621
3.121
3.459
3.959
4.459
4.959
5.188
5.400
6.188
6.400
6.917
7.188
7.400
7.917
8.188
8.647
8.917
9.188
0.821
0.921
1.021
1.221
1.421
1.500
1.621
1.785
1.985
2.061
2.221
2.246
2.721
3.221
3.599
4.099
4.599
5.099
5.378
5.550
6.378
6.550
7.153
7.378
7.520
8.153
8.378
8.912
9.153
9.378 M10X0.75
M10X0.5
M11X1.0
M11X0.75
M12X1.5
9.50
10.00
10.30
10.50
10.80
9.520
10.153
10.378
10.676
10.912
9.400
9.917
10.188
10.376
10.647
Page 3 of 10
M12X1.25
公制细螺纹
规格
M12X1.0
M12X0.5
M14X1.5
M14X1.0
M15X1.5
M15X1.0
M16X1.5
M16X1.0
M17X1.5
M17X1.0
M18X2.0
M18X1.5
M18X1.0
M20X2.0
M20X1.5
M20X1.0
M22X2.0
M22X1.5
M22X1.0
M24X2.0
M24X1.5
M24X1.0
M25X2.0
M25X1.5
M25X1.0
M26X1.5
标准径
最大
11.00
11.50
12.50
13.00
13.50
14.00
14.50
15.00
15.50
16.00
16.00
16.50
17.00
18.00
18.50
19.00
20.00
20.50
21.00
22.00
22.50
23.00
23.00
23.50
24.00
24.50
25.00
2级牙钻孔径
最小
10.917
11.400
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
24.376
24.835
11.153
11.520
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
24.676
25.210 M27X2.0
M27X1.5
M27X1.0
M28X2.0
M28X1.5
M28X1.0
M30X3.0
M30X2.0
M30X1.5
25.50
26.00
26.00
26.50
27.00
27.00
28.00
28.50
25.676
26.153
26.210
26.676
27.153
27.252
28.210
28.676
25.376
25.917
25.835
26.376
26.917
26.752
27.835
28.376
Page 4 of 10
公制细螺纹
规格
M30X1.0
M32X2.0
M32X1.5
M33X3.0
M33X2.0
M33X1.5
M35X1.5
M36X3.0
M36X2.0
M36X1.5
标准径
最大
29.00
30.00
30.50
30.00
31.00
31.50
33.50
33.00
34.00
34.50
29.153
30.210
30.676
30.252
31.210
31.676
33.676
33.252
34.210
34.676
2级牙钻孔径
最小
28.917
29.835
30.376
29.752
30.835
31.376
33.376
32.752
33.835
34.376
美制细螺纹
标准径
规格 (UNF)
No.0-80 (1.524)(螺丝牙外
No.1-72 (1.854)
No.2-64 (2.184)
No.3-56 (2.515)
No.4-48 (2.845)
No.5-44 (3.175)
No.6-40 ⑶ 505)
No.8-36 (4.166)
No.10-32 (4.826)
No.12-28 (5.846)
1/4 - 28
2级牙钻孔径
最大 最小
1.182
1.474
1.756
2.025
2.271
2.551
2.820
3.404
3.963
4.496
5.360
6.782
1.25
1.55
1.85
2.10
2.40
2.70
2.90
3.50
4.10
4.60
5.50
6.90
1.305
1.612
1.912
2.197
2.458
2.740
3.022
3.606
4.165
4.724
5.588
7.035 5/16 - 24
3/8 - 24
7/16 - 20
1/2 - 20
9/16 - 18
5/8 - 18
3/4 - 16
7/8 - 14
8.50
9.90
11.50
12.90
14.50
17.50
20.50
23.20
8.636
10.033
11.607
13.081
14.681
17.678
20.675
23.571
8.382
9.729
11.329
12.751
14.351
17.323
20.270
23.114
Page 5 of 10
1 - 12
1-1/8 - 12 26.50 26.746 26.289
1-1/4 - 12 29.50 29.921 29.464
美制细螺纹
规格 标准径
2级牙钻孔径
最大 最小
1-3/8 - 12 32.80 33.096 32.639
1-1/2 - 12 36.0 36.271 35.814
公制迫牙丝攻钻孔径
规格
精度等级
G4 - G6 G7 - G8 G9
M1.0X0.25 0.86 0.88
M1.1 X0.25 0.96 0.98
M1.2X0.25 1.06 1.08
M1.4X0.3 1.24 1.25
M1.6X0.35 1.41 1.43
M1.7X0.35 1.51 1.53
M1.8X0.35 1.61 1.63
M2.0X0.4 1.78 1.80
M2.2X0.45 1.95 1.98
M2.3X0.4 2.08 2.10
M2.5X0.45 2.25 2.28
M2.6X0.45 2.35 2.38
M3.0X0.5 2.73 2.75
M3.5X0.6 3.17 3.20
M4.0X0.7 3.62 3.65 3.69
M5.0X0.8 4.56 4.60 4.64
M6.0X1.0
M7.0X1.0
M8.0X1.25
M10X1.5
M10X1.25
M12X1.75
M12X1.25
5.45
6.45
7.31
9.18
9.31
11.04
11.31
5.50
6.50
7.38
9.25
9.38
11.12
11.38
5.55
6.55
7.44
9.32
9.44
11.21
11.44
注：迫牙丝攻之钻孔径,在上表所列之数值,由於被加工材料之材质、硬度、形状、尺寸等之
影响,多少会有所变动,因此於参考上表之同时,亦请增减假设干.
Page 6 of 10
美制粗螺纹
标准径
规格 (UNC)
No.1 - 64 (1.854)(螺丝牙
No.2 - 56 (2.184)
No.3 - 48 (2.515)
No.4 - 40 (2.845)
No.5 - 40 (3.175)
No.6 - 32 ⑶ 505)
No.8 - 32 (4.166)
No.10 - 24 (4.826)
No.12 - 24 (5.486)
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
2级牙钻孔径
最大 最小
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
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
12.868
18.840
19.761
22.606
25.349
28.524
1.55
1.80
2.10
2.30
2.60
2.80
3.40
3.90
4.50
5.10
6.60
8.00
9.40
10.80
12.20
13.60
16.50
19.50
22.20
25.00
28.20 1-1/4 - 7
1-3/8 - 6
1-1/2 - 6
1-3/4 - 5
2 - 4-1/2
30.80
34.00
39.50
45.20
31.115
34.290
39.827
45.593
30.353
33.528
38.964
44.679
美制特细螺纹
标准径
规格 〔UNEF〕
No.12 - 32
1/4 - 32
5/16 - 32
3/8 - 32
2级牙钻孔径
最大 最小
4.623
5.486
7.087
8.661
10.135
Page 7 of 10
4.70
5.60
7.10
8.70
10.20
4.826
5.690
7.264
8.865
10.338 7/16 - 28
1/2 -28
9/16 - 24
11.80
13.20
11.938
13.386
11.709
13.132
美制特细螺纹
标准径
规格 (UNEF)
5/8 - 24
3/4 - 20
7/8 - 20
1 - 20
14.80
17.80
21.00
24.00
最大
14.986
17.958
21.133
24.308
2级牙钻孔径
最小
14.732
17.678
20.853
24.028
英制管螺纹
规格
PS 1/16 - 28
PS 1/8 - 28
PS 1/4 - 19
PS 3/8 - 19
PS 1/2 - 14
PS 3/4 - 14
PS 1 - 11
PS 1-1/4 - 11
PS 1-1/2 - 11
标准径
最大
6.50
8.50
11.40
15.00
18.50
24.00
30.20
38.80
44.80
56.50
6.632
8.637
11.549
15.054
18.773
24.259
30.471
39.132
45.025
56.836
钻孔径
最小
6.490
8.495
11.341
14.846
18.489
23.975
30.111
38.772
44.665
56.476 PS 2 - 11
英制管螺纹
规格
标准径
有效牙部之长度 标准长度〔最小〕
使用绞刀时 不用绞刀时
〔最小〕中之母螺牙
中之母螺牙内径
PT 1/16 - 28 6.10 6.20 6.244 6.384
PT 1/8 - 28 8.10 8.20 8.249 8.388
PT 1/4 - 19 10.70 11.00 10.962 11.174
PT 3/8 - 19 14.20 14.50 14.448 14.658
PT 1/2 - 14 17.60 18.00 17.979 18.263
PT 3/4 - 14 23.00 23.50 23.378 23.663
PT 1 - 11 29.00 29.50 29.459 29.822
PT 1-1/4 - 11 37.50 38.00 37.976 38.339
PT 1-1/2 - 11 43.40 44.00 43.869 44.232
PT 2 - 11 54.90 55.50 55.412 55.844
美制管螺纹
规格
钻孔径
PS 1/16 - 28
N P T
N P S
使用绞刀时 不用绞刀时
1/16 - 27 6.10 6.25 6.35
1/8 - 27 8.33 8.43 8.74
1/4 - 18 10.72 11.13 11.13
3/8 - 18 14.27 14.27 14.68
1/2 - 14 17.48 17.86 18.26
3/4 - 14 22.63 23.01 23.42
1 - 11 - 1/2 28.58 28.98 29.36
1- 1/4 -11-1/2 37.31 37.69 38.10
1-1/2 -- 11-1/2 43.66 44.04 44.45
2 - 11 - 1/2 55.58 55.96 56.36
公制螺纹
规格 滚造径
Page 8 of 10
M3 X 0.5 2.63 - 2.60
M3.0 X 0.6 2.56 - 2.53
M3.5 X 0.6 3.06 - 3.03
M4.0 X 0.7 3.49 - 3.45
M4.0 X 0.75 3.45 - 3.41
M4.5 X 0.75 3.96 - 3.92
M5.0 X 0.8 4.43 - 4.38
M5.0 X 0.9 4.36 - 4.31
M6.0 X 1.0 5.30 - 5.25
M7.0 X 1.0 6.30 - 6.25
M8.0 X 1.0 7.28 - 7.23
M8.0 X 1.25 7.12 - 7.07
英制螺纹规格
钻孔径
硬材 软材
W 1/8 - 40 2.65 2.60
W 5/32 - 32 3.25 3.20
W 3/16 - 24 3.75 3.70
W 1/4 - 20 5.10 5.00
W 5/16 - 18 6.60 6.50
英制螺纹
规格
钻孔径
硬材 软材
W 3/8 - 16 8.00 7.90
W 7/16 - 14 9.40 9.30
W 1/2 - 12 10.70 10.50
W 9/16 - 12 12.30 12.00
W 5/8 - 11 13.70 13.50
W 3/4 - 10 16.70 16.50
W 7/8 - 9 19.50 19.30
W 1 - 8 22.40 22.00
W 1-1/8 - 7 25.00 24.80
W 1-1/4 - 7 28.30 28.00
英制电器螺纹
规格 钻孔径
Page 9 of 10
2BA
4.0 - 4.2
3.0 - 3.2
2.7 - 2.8
2.4 - 2.5
3BA
4BA
5BA
6BA
美制迫牙丝攻钻孔径
规格
钻孔径
G4 - G6 G7 - G8 G9
No.2 - 56UNC 1.94
No.3 - 48 2.23
No.4 - 40 2.50
No.5 - 40 2.83
No.6 - 32 3.07
No.8 - 32 3.73 3.77
No.10 - 24 4.24 4.30
No.12 - 24 4.90 4.96
1/4 - 20 5.72
5/16 - 18 7.24
3/8 - 16 8.74 8.81
7/16 - 14 10.20 10.30
1/2 - 13 11.27 11.82
No.2 - 64UNF 1.97
美制迫牙丝攻钻孔径
规格
钻孔径
G4 - G6 G7 - G8 G9
No.3 - 56 2.27
No.4 - 48 2.56
No.5 - 44 2.86
No.6 - 40 3.16
No.8 - 36 3.78
No.10 - 32 4.39 4.43
No.12 - 28 4.99 5.04
1/4 - 28 5.85 5.90
5/16 - 24 7.36 7.41
3/8 - 24
9.00
Page 10 of 10
7/16 -20
10.48
12.07
10.54
12.13
1/2 -20
针车用螺纹
规格
SM 1/8 - 40
SM 1/8 - 44
SM 9/64 - 40
SM 11/64 - 40
SM 3/16 - 32
SM 3/16 - 28
SM 7/32 - 32
SM 15/64 - 28
SM 1/4 - 40
SM 1/4 - 28
SM 9/32 - 28
SM 11/32 - 28
SM 3/8 - 28
SM 7/16 - 28
SM 7/16 - 16
SM 1/2 - 20
SM 9/16 - 20
滚造径
2.735 - 2.688
2.769 - 2.722
3.128 - 3.083
3.855 - 3.805
4.205 - 4.155
4.143 - 4.093
5.003 - 4.955
5.325 - 5.570
5.890 - 5.735
5.721 - 5.366
6.508 - 6.648
8.092 - 8.432
8.880 - 8.015
10.466 - 10.401
10.037 - 9.967
11.819 - 11.749
13.400 - 13.425
针车用螺纹
规格
SM 1/8 - 40
SM 1/8 - 44
SM 9/64 - 40
SM 11/64 - 40
SM 3/16 - 32
SM 3/16 - 28
SM 7/32 - 32
SM 15/64 - 28
SM 1/4 - 40
SM 1/4 - 28
SM 9/32 - 28
SM 11/32 - 28
SM 3/8 - 28
SM 7/16 - 28
SM 7/16 - 16
SM 1/2 - 20
滚造径
2.735 - 2.688
2.769 - 2.722
3.128 - 3.083
3.855 - 3.805
4.205 - 4.155
4.143 - 4.093
5.003 - 4.955
5.325 - 5.570
5.890 - 5.735
5.721 - 5.366
6.508 - 6.648
8.092 - 8.432
8.880 - 8.015
10.466 - 10.401
10.037 - 9.967
11.819 - 11.749
13.400 - 13.425 SM 9/16 - 20
Page 6 of 10
美制粗螺纹
标准径
规格 (UNC)
No.1 - 64 (1.854)(螺丝牙
No.2 - 56 (2.184)
No.3 - 48 (2.515)
No.4 - 40 (2.845)
No.5 - 40 (3.175)
No.6 - 32 ⑶ 505)
No.8 - 32 (4.166)
No.10 - 24 (4.826)
No.12 - 24 (5.486)
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 - 4-1/2
1.55
1.80
2.10
2.30
2.60
2.80
3.40
3.90
4.50
5.10
6.60
8.00
9.40
10.80
12.20
13.60
16.50
19.50
22.20
25.00
28.20
30.80
34.00
39.50
45.20
最大
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
12.868
18.840
19.761
22.606
25.349
28.524
31.115
34.290
39.827
45.593
2级牙钻孔径
最小
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
美制特细螺纹
标准径
规格 (UNEF)
2级牙钻孔径
最大 最小
4.623 No.12 - 32 4.70 4.826
1/4 - 32
5/16 - 32
3/8 - 32
5.60
7.10
8.70
10.20
5.690
7.264
8.865
10.338
5.486
7.087
8.661
10.135
Page 7 of 10
7/16 - 28
1/2 -28
9/16 - 24
11.80
13.20
11.938
13.386
11.709
13.132
美制特细螺纹
标准径
规格 (UNEF)
5/8 - 24
3/4 - 20
7/8 - 20
1 - 20
2级牙钻孔径
最大 最小
14.732
17.678
20.853
24.028
14.80
17.80
21.00
24.00
14.986
17.958
21.133
24.308
2024年2月22日发(作者：六娴淑)
本表所推选之钻头孔径,是针对攻牙加工时,能够很容易的了解钻孔直径；而依据市场售之标准钻头 所选所的.在使用钻头的情况下,由於钻头的形状及尺寸、精度、被钻孔之材质等,对於所钻孔的尺寸、 精度有很大的影响,所以使用本表之钻孔径,假设有不当之处,应视实际状况适当的变更钻头直径.本表是 依据2级牙制订.
公制粗螺纹
规格
M1.0X0.25
M1.1X0.25
M1.2X0.25
M1.4X0.3
M1.6X0.35
M1.7X0.35
M1.8X0.35
M2.0X0.4
M2.2X0.45
M2.3X0.4
M2.5X0.45
M2.6X0.45
M3.0X0.5
M3.0X0.6
M3.5X0.6
M4.0X0.7
M4.0X0.75
M4.5X0.75
M5.0X0.8
M5.0X0.9
M6.0X1.0
M7.0X1.0
M8.0X1.25
M9.0X1.25
M10X1.5
M11X1.5
M12X1.75
M14X2.0
M16X2.0
M18X2.5
M20X2.5
M22X2.5
标准径
最大
0.75
0.85
0.95
1.10
1.25
1.35
1.45
1.60
1.75
1.90
2.10
2.20
2.50
2.40
2.90
3.30
3.25
3.80
4.20
4.10
5.00
6.00
6.80
7.80
8.50
8.50
10.30
12.00
14.00
15.50
17.50
19.50
21.00
2级牙钻孔径
最小
0.729
0.829
0.929
1.075
1.221
1.321
1.421
1.567
1.713
1.867
2.013
2.113
2.459
2.280
2.850
3.242
3.106
3.688
4.134
3.930
4.917
5.917
6.647
7.647
8.376
8.376
10.106
11.835
13.835
15.294
17.294
19.294
20.752
0.785
0.885
0.985
1.142
1.321
1.421
1.521
1.679
1.838
1.979
2.138
2.238
2.599
2.440
3.010
3.422
3.326
3.878
4.334
4.170
5.153
6.153
6.912
7.912
8.676
8.676
10.441
12.210
14.210
15.744
17.744
19.744
21.252 M24X3.0
M27X3.0 24.00 24.252 23.752
Page 2 of 10
M30X3.5 26.50 26.771 26.211
公制细螺纹
规格
M1.0X0.2
M1.1X0.2
M1.2X0.2
M1.4X0.2
M1.6X0.2
M1.7X0.2
M1.8X0.2
M2.0X0.25
M2.2X0.25
M2.3X0.25
M2.5X0.35
M2.6X0.35
M3.0X0.35
M3.5X0.35
M4.0X0.5
M4.5X0.5
M5.0X0.5
M5.5X0.5
M6.0X0.75
M6.0X0.5
M7.0X0.75
M7.0X0.5
M8.0X1.0
M8.0X0.75
M8.0X0.5
M9.0X1.0
M9.0X0.75
M10X1.25
M10X1.0
标准径
最大
0.80
0.90
1.00
1.20
1.40
1.45
1.60
1.75
1.95
2.05
2.20
2.20
2.70
3.20
3.50
4.00
4.50
5.00
5.30
5.50
6.30
6.50
7.00
7.30
7.50
8.00
8.30
8.80
9.00
9.30
2级牙钻孔径
最小
0.783
0.883
.0983
1.183
1.383
1.460
1.583
1.729
1.929
2.001
2.121
2.186
2.621
3.121
3.459
3.959
4.459
4.959
5.188
5.400
6.188
6.400
6.917
7.188
7.400
7.917
8.188
8.647
8.917
9.188
0.821
0.921
1.021
1.221
1.421
1.500
1.621
1.785
1.985
2.061
2.221
2.246
2.721
3.221
3.599
4.099
4.599
5.099
5.378
5.550
6.378
6.550
7.153
7.378
7.520
8.153
8.378
8.912
9.153
9.378 M10X0.75
M10X0.5
M11X1.0
M11X0.75
M12X1.5
9.50
10.00
10.30
10.50
10.80
9.520
10.153
10.378
10.676
10.912
9.400
9.917
10.188
10.376
10.647
Page 3 of 10
M12X1.25
公制细螺纹
规格
M12X1.0
M12X0.5
M14X1.5
M14X1.0
M15X1.5
M15X1.0
M16X1.5
M16X1.0
M17X1.5
M17X1.0
M18X2.0
M18X1.5
M18X1.0
M20X2.0
M20X1.5
M20X1.0
M22X2.0
M22X1.5
M22X1.0
M24X2.0
M24X1.5
M24X1.0
M25X2.0
M25X1.5
M25X1.0
M26X1.5
标准径
最大
11.00
11.50
12.50
13.00
13.50
14.00
14.50
15.00
15.50
16.00
16.00
16.50
17.00
18.00
18.50
19.00
20.00
20.50
21.00
22.00
22.50
23.00
23.00
23.50
24.00
24.50
25.00
2级牙钻孔径
最小
10.917
11.400
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
24.376
24.835
11.153
11.520
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
24.676
25.210 M27X2.0
M27X1.5
M27X1.0
M28X2.0
M28X1.5
M28X1.0
M30X3.0
M30X2.0
M30X1.5
25.50
26.00
26.00
26.50
27.00
27.00
28.00
28.50
25.676
26.153
26.210
26.676
27.153
27.252
28.210
28.676
25.376
25.917
25.835
26.376
26.917
26.752
27.835
28.376
Page 4 of 10
公制细螺纹
规格
M30X1.0
M32X2.0
M32X1.5
M33X3.0
M33X2.0
M33X1.5
M35X1.5
M36X3.0
M36X2.0
M36X1.5
标准径
最大
29.00
30.00
30.50
30.00
31.00
31.50
33.50
33.00
34.00
34.50
29.153
30.210
30.676
30.252
31.210
31.676
33.676
33.252
34.210
34.676
2级牙钻孔径
最小
28.917
29.835
30.376
29.752
30.835
31.376
33.376
32.752
33.835
34.376
美制细螺纹
标准径
规格 (UNF)
No.0-80 (1.524)(螺丝牙外
No.1-72 (1.854)
No.2-64 (2.184)
No.3-56 (2.515)
No.4-48 (2.845)
No.5-44 (3.175)
No.6-40 ⑶ 505)
No.8-36 (4.166)
No.10-32 (4.826)
No.12-28 (5.846)
1/4 - 28
2级牙钻孔径
最大 最小
1.182
1.474
1.756
2.025
2.271
2.551
2.820
3.404
3.963
4.496
5.360
6.782
1.25
1.55
1.85
2.10
2.40
2.70
2.90
3.50
4.10
4.60
5.50
6.90
1.305
1.612
1.912
2.197
2.458
2.740
3.022
3.606
4.165
4.724
5.588
7.035 5/16 - 24
3/8 - 24
7/16 - 20
1/2 - 20
9/16 - 18
5/8 - 18
3/4 - 16
7/8 - 14
8.50
9.90
11.50
12.90
14.50
17.50
20.50
23.20
8.636
10.033
11.607
13.081
14.681
17.678
20.675
23.571
8.382
9.729
11.329
12.751
14.351
17.323
20.270
23.114
Page 5 of 10
1 - 12
1-1/8 - 12 26.50 26.746 26.289
1-1/4 - 12 29.50 29.921 29.464
美制细螺纹
规格 标准径
2级牙钻孔径
最大 最小
1-3/8 - 12 32.80 33.096 32.639
1-1/2 - 12 36.0 36.271 35.814
公制迫牙丝攻钻孔径
规格
精度等级
G4 - G6 G7 - G8 G9
M1.0X0.25 0.86 0.88
M1.1 X0.25 0.96 0.98
M1.2X0.25 1.06 1.08
M1.4X0.3 1.24 1.25
M1.6X0.35 1.41 1.43
M1.7X0.35 1.51 1.53
M1.8X0.35 1.61 1.63
M2.0X0.4 1.78 1.80
M2.2X0.45 1.95 1.98
M2.3X0.4 2.08 2.10
M2.5X0.45 2.25 2.28
M2.6X0.45 2.35 2.38
M3.0X0.5 2.73 2.75
M3.5X0.6 3.17 3.20
M4.0X0.7 3.62 3.65 3.69
M5.0X0.8 4.56 4.60 4.64
M6.0X1.0
M7.0X1.0
M8.0X1.25
M10X1.5
M10X1.25
M12X1.75
M12X1.25
5.45
6.45
7.31
9.18
9.31
11.04
11.31
5.50
6.50
7.38
9.25
9.38
11.12
11.38
5.55
6.55
7.44
9.32
9.44
11.21
11.44
注：迫牙丝攻之钻孔径,在上表所列之数值,由於被加工材料之材质、硬度、形状、尺寸等之
影响,多少会有所变动,因此於参考上表之同时,亦请增减假设干.
Page 6 of 10
美制粗螺纹
标准径
规格 (UNC)
No.1 - 64 (1.854)(螺丝牙
No.2 - 56 (2.184)
No.3 - 48 (2.515)
No.4 - 40 (2.845)
No.5 - 40 (3.175)
No.6 - 32 ⑶ 505)
No.8 - 32 (4.166)
No.10 - 24 (4.826)
No.12 - 24 (5.486)
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
2级牙钻孔径
最大 最小
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
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
12.868
18.840
19.761
22.606
25.349
28.524
1.55
1.80
2.10
2.30
2.60
2.80
3.40
3.90
4.50
5.10
6.60
8.00
9.40
10.80
12.20
13.60
16.50
19.50
22.20
25.00
28.20 1-1/4 - 7
1-3/8 - 6
1-1/2 - 6
1-3/4 - 5
2 - 4-1/2
30.80
34.00
39.50
45.20
31.115
34.290
39.827
45.593
30.353
33.528
38.964
44.679
美制特细螺纹
标准径
规格 〔UNEF〕
No.12 - 32
1/4 - 32
5/16 - 32
3/8 - 32
2级牙钻孔径
最大 最小
4.623
5.486
7.087
8.661
10.135
Page 7 of 10
4.70
5.60
7.10
8.70
10.20
4.826
5.690
7.264
8.865
10.338 7/16 - 28
1/2 -28
9/16 - 24
11.80
13.20
11.938
13.386
11.709
13.132
美制特细螺纹
标准径
规格 (UNEF)
5/8 - 24
3/4 - 20
7/8 - 20
1 - 20
14.80
17.80
21.00
24.00
最大
14.986
17.958
21.133
24.308
2级牙钻孔径
最小
14.732
17.678
20.853
24.028
英制管螺纹
规格
PS 1/16 - 28
PS 1/8 - 28
PS 1/4 - 19
PS 3/8 - 19
PS 1/2 - 14
PS 3/4 - 14
PS 1 - 11
PS 1-1/4 - 11
PS 1-1/2 - 11
标准径
最大
6.50
8.50
11.40
15.00
18.50
24.00
30.20
38.80
44.80
56.50
6.632
8.637
11.549
15.054
18.773
24.259
30.471
39.132
45.025
56.836
钻孔径
最小
6.490
8.495
11.341
14.846
18.489
23.975
30.111
38.772
44.665
56.476 PS 2 - 11
英制管螺纹
规格
标准径
有效牙部之长度 标准长度〔最小〕
使用绞刀时 不用绞刀时
〔最小〕中之母螺牙
中之母螺牙内径
PT 1/16 - 28 6.10 6.20 6.244 6.384
PT 1/8 - 28 8.10 8.20 8.249 8.388
PT 1/4 - 19 10.70 11.00 10.962 11.174
PT 3/8 - 19 14.20 14.50 14.448 14.658
PT 1/2 - 14 17.60 18.00 17.979 18.263
PT 3/4 - 14 23.00 23.50 23.378 23.663
PT 1 - 11 29.00 29.50 29.459 29.822
PT 1-1/4 - 11 37.50 38.00 37.976 38.339
PT 1-1/2 - 11 43.40 44.00 43.869 44.232
PT 2 - 11 54.90 55.50 55.412 55.844
美制管螺纹
规格
钻孔径
PS 1/16 - 28
N P T
N P S
使用绞刀时 不用绞刀时
1/16 - 27 6.10 6.25 6.35
1/8 - 27 8.33 8.43 8.74
1/4 - 18 10.72 11.13 11.13
3/8 - 18 14.27 14.27 14.68
1/2 - 14 17.48 17.86 18.26
3/4 - 14 22.63 23.01 23.42
1 - 11 - 1/2 28.58 28.98 29.36
1- 1/4 -11-1/2 37.31 37.69 38.10
1-1/2 -- 11-1/2 43.66 44.04 44.45
2 - 11 - 1/2 55.58 55.96 56.36
公制螺纹
规格 滚造径
Page 8 of 10
M3 X 0.5 2.63 - 2.60
M3.0 X 0.6 2.56 - 2.53
M3.5 X 0.6 3.06 - 3.03
M4.0 X 0.7 3.49 - 3.45
M4.0 X 0.75 3.45 - 3.41
M4.5 X 0.75 3.96 - 3.92
M5.0 X 0.8 4.43 - 4.38
M5.0 X 0.9 4.36 - 4.31
M6.0 X 1.0 5.30 - 5.25
M7.0 X 1.0 6.30 - 6.25
M8.0 X 1.0 7.28 - 7.23
M8.0 X 1.25 7.12 - 7.07
英制螺纹规格
钻孔径
硬材 软材
W 1/8 - 40 2.65 2.60
W 5/32 - 32 3.25 3.20
W 3/16 - 24 3.75 3.70
W 1/4 - 20 5.10 5.00
W 5/16 - 18 6.60 6.50
英制螺纹
规格
钻孔径
硬材 软材
W 3/8 - 16 8.00 7.90
W 7/16 - 14 9.40 9.30
W 1/2 - 12 10.70 10.50
W 9/16 - 12 12.30 12.00
W 5/8 - 11 13.70 13.50
W 3/4 - 10 16.70 16.50
W 7/8 - 9 19.50 19.30
W 1 - 8 22.40 22.00
W 1-1/8 - 7 25.00 24.80
W 1-1/4 - 7 28.30 28.00
英制电器螺纹
规格 钻孔径
Page 9 of 10
2BA
4.0 - 4.2
3.0 - 3.2
2.7 - 2.8
2.4 - 2.5
3BA
4BA
5BA
6BA
美制迫牙丝攻钻孔径
规格
钻孔径
G4 - G6 G7 - G8 G9
No.2 - 56UNC 1.94
No.3 - 48 2.23
No.4 - 40 2.50
No.5 - 40 2.83
No.6 - 32 3.07
No.8 - 32 3.73 3.77
No.10 - 24 4.24 4.30
No.12 - 24 4.90 4.96
1/4 - 20 5.72
5/16 - 18 7.24
3/8 - 16 8.74 8.81
7/16 - 14 10.20 10.30
1/2 - 13 11.27 11.82
No.2 - 64UNF 1.97
美制迫牙丝攻钻孔径
规格
钻孔径
G4 - G6 G7 - G8 G9
No.3 - 56 2.27
No.4 - 48 2.56
No.5 - 44 2.86
No.6 - 40 3.16
No.8 - 36 3.78
No.10 - 32 4.39 4.43
No.12 - 28 4.99 5.04
1/4 - 28 5.85 5.90
5/16 - 24 7.36 7.41
3/8 - 24
9.00
Page 10 of 10
7/16 -20
10.48
12.07
10.54
12.13
1/2 -20
针车用螺纹
规格
SM 1/8 - 40
SM 1/8 - 44
SM 9/64 - 40
SM 11/64 - 40
SM 3/16 - 32
SM 3/16 - 28
SM 7/32 - 32
SM 15/64 - 28
SM 1/4 - 40
SM 1/4 - 28
SM 9/32 - 28
SM 11/32 - 28
SM 3/8 - 28
SM 7/16 - 28
SM 7/16 - 16
SM 1/2 - 20
SM 9/16 - 20
滚造径
2.735 - 2.688
2.769 - 2.722
3.128 - 3.083
3.855 - 3.805
4.205 - 4.155
4.143 - 4.093
5.003 - 4.955
5.325 - 5.570
5.890 - 5.735
5.721 - 5.366
6.508 - 6.648
8.092 - 8.432
8.880 - 8.015
10.466 - 10.401
10.037 - 9.967
11.819 - 11.749
13.400 - 13.425
针车用螺纹
规格
SM 1/8 - 40
SM 1/8 - 44
SM 9/64 - 40
SM 11/64 - 40
SM 3/16 - 32
SM 3/16 - 28
SM 7/32 - 32
SM 15/64 - 28
SM 1/4 - 40
SM 1/4 - 28
SM 9/32 - 28
SM 11/32 - 28
SM 3/8 - 28
SM 7/16 - 28
SM 7/16 - 16
SM 1/2 - 20
滚造径
2.735 - 2.688
2.769 - 2.722
3.128 - 3.083
3.855 - 3.805
4.205 - 4.155
4.143 - 4.093
5.003 - 4.955
5.325 - 5.570
5.890 - 5.735
5.721 - 5.366
6.508 - 6.648
8.092 - 8.432
8.880 - 8.015
10.466 - 10.401
10.037 - 9.967
11.819 - 11.749
13.400 - 13.425 SM 9/16 - 20
Page 6 of 10
美制粗螺纹
标准径
规格 (UNC)
No.1 - 64 (1.854)(螺丝牙
No.2 - 56 (2.184)
No.3 - 48 (2.515)
No.4 - 40 (2.845)
No.5 - 40 (3.175)
No.6 - 32 ⑶ 505)
No.8 - 32 (4.166)
No.10 - 24 (4.826)
No.12 - 24 (5.486)
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 - 4-1/2
1.55
1.80
2.10
2.30
2.60
2.80
3.40
3.90
4.50
5.10
6.60
8.00
9.40
10.80
12.20
13.60
16.50
19.50
22.20
25.00
28.20
30.80
34.00
39.50
45.20
最大
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
12.868
18.840
19.761
22.606
25.349
28.524
31.115
34.290
39.827
45.593
2级牙钻孔径
最小
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
美制特细螺纹
标准径
规格 (UNEF)
2级牙钻孔径
最大 最小
4.623 No.12 - 32 4.70 4.826
1/4 - 32
5/16 - 32
3/8 - 32
5.60
7.10
8.70
10.20
5.690
7.264
8.865
10.338
5.486
7.087
8.661
10.135
Page 7 of 10
7/16 - 28
1/2 -28
9/16 - 24
11.80
13.20
11.938
13.386
11.709
13.132
美制特细螺纹
标准径
规格 (UNEF)
5/8 - 24
3/4 - 20
7/8 - 20
1 - 20
2级牙钻孔径
最大 最小
14.732
17.678
20.853
24.028
14.80
17.80
21.00
24.00
14.986
17.958
21.133
24.308