各种螺纹规格修订Word文档格式.docx
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5.153
4.917
M7.0×
6.00
6.153
5.917
M8.0×
6.80
6.912
6.647
M9.0×
7.80
7.912
7.647
M10×
1.5
8.50
8.676
8.376
M11×
M12×
10.30
10.441
10.106
M14×
2.0
12.00
12.210
11.835
M16×
14.00
14.210
13.835
M18×
2.5
15.50
15.744
15.294
M20×
17.50
17.744
17.294
M22×
19.50
19.744
19.294
M24×
3.0
21.00
21.252
20.752
M27×
24.00
24.252
23.752
M30×
3.5
26.50
26.771
26.211
Page2of10
公制细螺纹
规格
标准径
最大
最小
0.2
0.80
0.821
0.783
0.90
0.921
0.883
1.00
1.021
.0983
1.20
1.183
1.40
1.383
1.500
1.460
1.621
1.583
1.785
1.729
1.95
1.985
1.929
2.05
2.061
2.001
2.221
2.121
2.246
2.186
2.70
2.721
2.621
3.20
3.221
3.121
3.50
3.599
3.459
4.00
4.099
3.959
4.50
4.599
4.459
M5.5×
5.099
4.959
5.30
5.378
5.188
5.50
5.550
5.400
6.30
6.378
6.188
6.50
6.550
6.400
7.00
7.153
6.917
7.30
7.378
7.188
7.50
7.520
7.400
8.00
8.153
7.917
8.30
8.378
8.188
8.80
8.912
8.647
9.00
9.153
8.917
9.30
9.378
9.188
9.50
9.520
9.400
10.00
10.153
9.917
10.378
10.188
10.50
10.676
10.376
10.80
10.912
10.647
Page3of10
11.00
11.153
10.917
11.50
11.520
11.400
12.50
12.676
12.376
13.00
13.153
12.917
M15×
13.50
13.676
13.376
14.153
13.917
14.50
14.676
14.376
15.00
15.153
14.917
M17×
15.676
15.376
16.00
16.153
15.917
16.210
15.835
16.50
16.676
16.376
17.00
17.153
16.917
18.00
18.210
17.835
18.50
18.676
18.376
19.00
19.153
18.917
20.00
20.210
19.835
20.50
20.676
20.376
21.153
20.917
22.00
22.210
21.835
22.50
22.676
22.376
23.00
23.153
22.917
M25×
23.210
22.835
23.50
23.676
23.376
24.153
23.917
M26×
24.50
24.676
24.376
25.00
25.210
24.835
25.50
25.676
25.376
26.00
26.153
25.917
M28×
26.210
25.835
26.676
26.376
27.00
27.153
26.917
27.252
26.752
28.00
28.210
27.835
28.50
28.676
28.376
Page4of10
29.00
29.153
28.917
M32×
30.00
30.210
29.835
30.50
30.676
30.376
M33×
30.252
29.752
31.00
31.210
30.835
31.50
31.676
31.376
M35×
33.50
33.676
33.376
M36×
33.00
33.252
32.752
34.00
34.210
33.835
34.50
34.676
34.376
美制细螺纹
（UNF）
2级牙钻孔径
No.0-80（1.524）（螺丝牙外径）径）））
1.305
1.182
No.1-72（1.854）
1.55
1.612
1.474
No.2-64（2.184）
1.85
1.912
1.756
No.3-56（2.515）
2.197
2.025
No.4-48（2.845）
2.40
2.458
2.271
No.5-44（3.175）
2.740
2.551
No.6-40（3.505）
3.022
2.820
No.8-36（4.166）
3.606
3.404
No.10-32（4.826）
4.10
4.165
3.963
No.12-28（5.846）
4.60
4.724
4.496
1/4-28
5.588
5.360
5/16-24
6.90
7.035
6.782
3/8-24
8.636
8.382
7/16-20
9.90
10.033
9.729
1/2-20
11.607
11.329
9/16-18
12.90
13.081
12.751
5/8-18
14.681
14.351
3/4-16
17.678
17.323
7/8-14
20.675
20.270
1-12
23.20
23.571
23.114
1-1/8-12
26.746
26.289
1-1/4–12
29.50
29.921
29.464
Page5of10
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
精度等级
G4–G6
G7–G8
G9
0.86
0.88
----
0.96
0.98
1.06
1.08
1.24
1.41
1.43
1.51
1.53
1.61
1.63
1.78
1.80
1.98
2.08
2.25
2.28
2.35
2.38
2.73
2.75
3.17
3.62
3.65
3.69
4.56
4.64
5.45
5.55
6.45
6.55
7.31
7.38
7.44
9.18
9.25
9.32
9.31
9.38
9.44
11.04
11.12
11.21
11.31
11.38
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，亦请增减若干。
Page6of10
美制粗螺纹
（UNC）
No.1–64（1.854）（螺丝牙外径）径
1.582
1.425
No.2-56（2.184）
1.871
1.695
No.3–48（2.515）
2.146
1.941
No.4–40（2.845）
2.30
2.385
2.157
No.5–40（3.175）
2.60
2.697
2.487
No.6–32（3.505）
2.80
2.895
2.642
No.8–32（4.166）
3.40
3.530
3.302
No.10–24（4.826）
3.90
3.962
3.683
No.12–24（5.486）
4.597
4.344
1/4-20
5.10
5.257
4.979
5/16-18
6.60
6.731
6.401
3/8-16
7.798
7/16-14
9.40
9.550
9.144
1/2-13
11.023
10.592
9/16-12
12.20
12.446
11.989
5/8-11
13.60
12.868
13.386
3/4-10
18.840
16.307
7/8–9
19.761
19.177
1–8
22.20
22.606
21.971
1-1/8–7
25.349
24.638
1-1/4–7
28.20
28.524
27.813
1-3/8–6
30.80
31.115
30.353
1-1/2–6
34.290
33.528
1-3/4-5
39.50
39.827
38.964
2–4-1/2
45.20
45.593
44.679
美制特细螺纹
（UNEF）
No.12–32
4.70
4.826
4.623
1/4–32
5.60
5.690
5.486
5/16–32
7.10
7.264
7.087
3/8-32
8.70
8.865
8.661
7/16–28
10.20
10.338
10.135
1/2-28
11.80
11.938
11.709
9/16-24
13.20
13.132
Page7of10
5/8-24
14.80
14.986814.7320
14.986
14.732
3/4-20
17.80
17.958
7/8-20
21.133
20.853
1-20
24.308
24.028
英制管螺纹
钻孔径
PS1/16-28
6.632
6.490
PS1/8–28
8.637
8.495
PS1/4–19
11.40
11.549
11.341
PS3/8–19
15.054
14.846
PS1/2–14
18.773
18.489
PS3/4-14
24.259
23.975
PS1–11
30.20
30.471
30.111
PS1-1/4–11
38.80
39.132
38.772
PS1-1/2–11
44.80
45.025
44.665
PS2–11
56.50
56.836
56.476
有效牙部之长度（最小）中之母螺牙内径
标准长度（最小）中之母螺牙内径
使用绞刀时
不用绞刀时
PT1/16–28
6.10
6.20
6.244
6.384
PT1/8–28
8.10
8.20
8.249
8.388
PT1/4–19
10.70
10.962
11.174
PT3/8–19
14.20
14.448
14.658
PT1/2–14
17.60
17.979
18.263
PT3/4–14
23.378
23.663
PT1–11
29.459
29.822
PT1-1/4–11
37.50
38.00
37.976
38.339
PT1-1/2–11
43.40
44.00
43.869
44.232
PT2–11
54.90
55.50
55.412
55.844
Page8of10
美制管螺纹
NPT
NPS
使用绞刀时
不用绞刀时
1/16–27
6.25
6.35
1/8–27
8.33
8.43
8.74
1/4–18
10.72
11.13
3/8–18
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
滚造径
M3×
0.5
2.63–2.60
M3.0×
0.6
2.56–2.53
M3.5×
3.06–3.03
M4.0×
0.7
3.49–3.45
0.75
3.45–3.41
M4.5×
3.96–3.92
M5.0×
0.8
4.43–4.38
0.9
4.36–4.31
M6.0×
1.0
5.30–5.25
M7.0×
6.30–6.25
M8.0×
7.28–7.23
1.25
7.12–7.07
英制螺纹
硬材
软材
W1/8-40
2.65
W5/32-32
3.25
W3/16-24
3.75
3.70
W1/4-20
W5/16-18
Page9of10
W3/8-16
7.90
W7/16-14
W1/2-12
W9/16-12
12.30
W5/8-11
13.70
W3/4-10
16.70
W7/8-9
19.30
W1–8
22.40
W1-1/8-7
24.80
W1-1/4-7
28.30
英制电器螺纹
2BA
4.0–4.2
3BA
4BA
3.0–3.2
5BA
2.7–2.8
6BA
2.4–2.5
美制迫牙丝攻钻孔径
钻孔径
No.2–56UNC
1.94
No.3–48
2.23
No.4–40
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
8.81
7/16–14
11.27
11.82
No.2–64UNF
1.97
Page10of10
No.3–56
2.27
No.4–48
2.56
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