1标准公制螺纹基本牙型和公式Word文档格式.docx
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9.188
8.647
M12
1.75
12.000
10.863
10.106
11.026
10.376
M14
2
14.000
12.701
11.835
13.026
12.376
M16
16.000
14.701
13.835
15.026
14.376
M18
2.5
18.000
16.376
15.294
(M18)
17.026
M20
20.000
18.376
17.294
19.026
M22
22.000
20.376
19.294
(M22)
20.701
19.835
M24
3
24.000
22.051
20.752
22.701
21.835
M27
27.000
25.051
23.752
26.000
25.701
24.835
M30
3.5
30.000
27.727
26.211
M28
28.000
26.701
25.835
M33
33.000
30.727
29.211
28.051
26.752
M36
4
36.000
34.402
31.670
32.000
31.051
29.752
M39
39.000
36.402
34.670
34.051
32.752
M42
4.5
42.000
39.077
37.129
38.000
37.051
35.752
螺纹公称直径d
钻头直径d
铜
不锈钢
0.4
1.6
0.25
1.75
0.5
2.5
0.35
2.15
0.7
3.3
3.5
5
0.8
4.1
4.2
4.5
6
4.9
0.75
5.2
8
1.25
6.6
6.7
7
7.1
7.2
10
1.5
8.4
8.5
8.6
8.7
6.9
12
10.1
10.2
10.4
10.5
10.6
10.7
10.9
11
14
11.8
12.4
12.5
12.9
13
16
13.8
14.4
14.5
14.9
15
18
15.3
15.5
15.8
16.4
16.5
16.9
17
20
17.3
17.5
17.8
18.4
18.5
18.9
19
22
19.3
19.5
19.8
20.4
20.5
20.9
21
24
20.7
21.8
22.4
22.5
22.9
23
非螺纹密封英制
英制锥管螺纹
英制锥螺纹
螺纹直径
牙数
钻头直径
1/8
28
8.8
27
1/4
11.7
11.2
11.1
3/8
15.2
14.7
1/2
18.3
17.9
3/4
24.4
23.6
23.2
30.6
29.7
11.5
29.2
1-1/4
39.2
38.3
37.9
1-3/8
41.6
1-1/2
44.1
43.9
45.1
55.8
56
螺距(t)
螺纹长度
基面上螺纹直径
牙型高度(h1)
有效长度
基面长度
外径(d)
中径(d2)
内径(d1)
0.91
9
9.73
9.15
8.57
0.58
1.34
13.16
12.3
11.45
0.86
16.66
15.81
14.95
1.81
7.5
20.96
19.79
18.63
1.16
9.5
26.44
25.28
24.12
2.31
33.25
31.77
30.29
1.48
41.91
40.43
38.95
47.81
46.33
44.85
26
59.62
58.14
56.66
30
18.5
75.19
73.71
72.23
32
20.5
87.89
86.41
84.93
38
25.5
113.03
111.56
110.08
本螺纹基面上各直径等于圆柱螺纹的各相应直径
基面上螺纹内径d1=d-1.28t
3/4″=26.44-1.28*1.81=24.12
斜角(φ)1°
47'
24″锥角(2tgφ)=1:
公称直径(英寸)
每英寸牙数(n)
管子外径(d)
管接头螺纹内径(d1'
)
名义尺寸
最大外径
最小外径
最大内径
最小内径
1/8
9.68
9.38
8.92
8.67
1/4
13.1
12.74
11.84
11.56
3/8
16.6
16.24
15.35
15.06
1/2
20.89
19.05
18.75
5/8
22.91
22.85
22.46
20.59
21.01
20.71
3/4
26.38
25.97
24.57
24.25
7/8
30.2
30.14
29.73
27.88
28.33
28.01
33.18
32.75
30.79
30.43
41.84
41.36
39.46
39.1
44.33
44.26
43.78
41.37
41.87
41.51
47.74
47.21
45.4
45
1-3/4
53.75
53.67
53.14
50.79
51.34
50.94
59.54
59.01
57.21
56.81
2-1/2
75.11
74.54
72.83
72.39
3
87.8
87.19
85.58
85.1
外径d由公称直径所决定
螺纹内径d1=d-1.28t
1/16
0.94
6.5
4.06
7.9
7.14
6.39
4.57
10.27
9.52
8.77
1.41
5.08
13.57
12.44
11.31
1.13
10.5
6.1
17.06
15.93
14.8
13.5
8.13
21.22
19.77
18.32
1.45
8.61
26.57
25.12
23.67
11-1/2
2.21
17.5
10.16
33.23
31.46
29.69
1.77
10.67
41.99
40.22
38.45
48.05
46.29
44.52
11.07
60.09
58.33
56.56
牙型高度h1=0.8t
基面上螺纹内径d1=d-1.6t
3/8″=17.06mmd1=17.06-1.6*1.41=14.80
公称直径
每寸牙数
外螺纹外径
内螺纹内径
选用钻头
最大尺寸
最小尺寸
3/16″
1.06
4.63
4.24
3.56
3.97
3.71
Φ3.7
1/4″
1.27
6.2
6.05
5.75
4.91
5.39
5.1
Φ5.1
5/16″
7.78
7.62
7.31
6.34
6.86
6.55
Φ6.5
3/8″
1.59
9.36
9.2
8.9
7.73
8.29
7.97
Φ7.9
7/16″
10.93
10.75
10.45
9.06
9.67
9.33
Φ9.3
1/2″
2.12
12.5
11.9
10.3
10.96
10.61
Φ10.5
9/16″
14.08
13.87
13.47
11.89
12.56
12.2
Φ12.1
5/8″
15.65
15.43
15.03
13.26
13.94
13.6
Φ13.5
3/4″
2.54
18.81
18.57
18.17
16.17
16.92
16.54
Φ16.4
7/8″
2.82
21.96
21.7
21.2
19.03
19.82
19.45
Φ19.5
1″
3.18
25.11
24.82
24.32
21.8
22.67
22.27
Φ22
1-1/8″
3.63
28.25
27.93
27.33
24.46
25.43
24.99
1-1/4″
31.43
31.09
30.49
27.64
28.59
28.18
1-3/8″
4.23
34.56
34.2
33.6
30.13
31.23
30.76
1-1/2″
37.73
37.36
36.76
33.31
34.38
33.94
1-3/4″
44.02
43.59
42.79
38.7
39.95
39.45
1-7/8″
5.64
47.15
46.68
45.88
41.23
42.58
42.06
2″
50.32
49.84
49.04
44.41
45.79
45.25
内螺纹(d')公称直径3/4″=19.05mm
外螺纹(d1)内径d'-1.28t3/4″=19.05-1.28*2.54=15.79mm
外螺纹(d1')内径d'-1.134t3/4″=19.05-1.134*2.54=16.16mm
公称直径(英寸)
螺距(t)
d=d'
-0.075t-0.05
11/16
1.814
17.28
15.4
8.08
19.6
5/8
15.69
13.82
18.84
16.65
0.976
6.23
5.24
1.587
12.53
10.9
25.15
22.52
内螺纹d'
(公称直径)
外螺纹d1=内径=d'
-1.28t3/4″=19.05-1.28*2.116=16.34
内螺纹d1=内径=d'
-1.134t3/4″=19.05-1.134*2.116=16.65
3/4″=12牙/英寸t=2.116
标准统一标准螺纹基本牙型和公式
公称尺寸
粗牙UNC
细牙UNF
#0-80
1.524
1.318
1.181
7/16-14
---
11.112
9.934
9.149
#1-64
1.854
1.598
1.425
7/16-20
10.287
9.738
#1-72
1.626
1.473
2/1-13
12.700
11.430
10.584
#2-56
2.184
1.890
1.694
2/1-20
11.874
11.326
#2-64
1.928
1.755
9/16-12
14.288
12.913
11.996
#3-48
2.515
2.172
1.941
9/16-18
13.371
12.761
#3-56
2.220
2.024
5/8-11
15.875
13.376
#4-40
2.845
2.433
2.156
5/8-18
14.958
14.348
#4-48
2.502
2.271
3/4-10
19.050
17.399
16.299
#5-40
3.175
2.764
2.487
3/4-16
18.019
17.330
#5-44
2.709
2.551
7/8-9
22.225
20.391
19.169
#6-32
3.505
2.990
2.647
7/8-14
21.046
20.262
#6-40
3.094
2.817
#8-32
4.166
3.650
3.307
1-8
25.400
23.338
21.963
#8-36
3.708
3.401
1-12
24.026
23.109
#10-24
4.826
4.138
3.680
11/8-7
28.575
26.218
24.648
#10-32
4.310
3.967
11/8-12
27.201
26.284
#12-24
5.486
4.798
4.341
11/4-7
31.750
29.393
27.823
#12-28
4.897
4.503
11/4-12
30.376
29.459
1/4-20
6.350
5.524
4.976
13/8-6
34.925
32.174
30.343
1/4-28
5.761
5.367
13/8-12
33.551
32.634
5/16-18
7.938
7.021
6.411
11/2-6
38.100
35.349
33.518
15/16-24
7.249
6.792
11/2-12
36.726
35.809