-
接头常用螺纹尺寸汇总
1
公制螺
纹基本尺寸及公差（牙形角
60
°
）
M
基本直径
螺纹代号
大
中径
小径
径
M10x1
M12x1
M14x1
M12x1.25
M14x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M20x1.5
M22x1.5
M24x1.5
M26x1.5
M27x1.5
M30x1.5
M33x1.5
M36x1.5
M39x1.5
M42x1.5
M27x2
M30x2
M33x2
M36x2
M39x2
M42x2
M45x2
M52x2
M60x2
M64x2
M72x2
10
12
14
12
14
12
14
16
18
20
22
24
26
27
30
33
36
39
42
27
30
33
36
39
42
45
52
60
64
72
9.35
11.3
13.3
11.1
1
3.1
11.0
13.0
15.0
17.0
19.0
21.0
23.0
25.0
26.0
2
9.0
32.0
35.0
38.0
41.0
25.7
28.7
31.7
34.7
37.7
4
0.7
43.7
50.7
58.7
62.7
70.7
6H
小径
公差
0,+0.236
0,+0.236
0,+0.236
0,+0.265
0,+0.265
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.300
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
内螺纹
公差等级
7H
中径
公差
0,+0.190
0,+0.200
0,+0.200
0,+0.224
0,+0.224
0,+0.236
0,+0.236
0,+0.236
0,+0.236
0,+0.236
0,+0.236
0,+0.250
0,+0.250
0,+0.250
0,+0.250
0,+0.250
0,+0.250
0,+0.250
0,+0.250
0,+0.280
0,+0.280
0,+0.280
0,+0.280
0,+0.280
0,+0.280
0,+0.280
0,+0.300
0,+0.300
0,+0.300
0,+0.300
小径
公差
0,+0.300
0,+0.300
0,+0.300
0,+0.335
0,+0.335
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.375
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
0,+0.475
外螺纹
公差等级
6g
中径
公差
-0.026,-0.138
-0.026,-0.144
-0.026,-0.144
-0.028,-0.160
-0.028,-0.160
-0.032,-0.172
-0.032,-0.172
-0.032,-0.172
-0.032,-0.172
-0.032,-0.172
-0.032,-0.172
-0.032,-0.182
-0.032,-0.182
-0.032,-0.182
-0.032,-0.182
-0.032,-0.182
-0.032,-0.182
-0.032,-0.182
-0.032,-0.182
-0.038,-0.208
-0.038,-0.208
-0.038,-0.208
-0.038,-0.208
-0.038,-0.208
-0.038,-0.208
-0.038,-0.208
-0.038,-0.218
-0.038,-0.218
-0.038,-0.218
-0.038,-0.218
大径
公差
-0.026,-0.206
-0.026,-0.206
-0.026,-0.206
-0.028,-0.240
-0.028,-0.240
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.032,-0.268
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
-0.038,-0.318
中径
公差
8.917
0,+0.150
10.917
0,+0.160
12.917
0,+0.160
10.647
0,+0.180
12.647
0,+0.180
10.376
0,+0.190
12.376
0,+0.190
14.376
0,+0.190
16.373
0,+0.190
18.376
0,+0.190
20.376
0,+0.190
22.376
0,+0.200
24.376
0,+0.200
25.376
0,+0.200
28.376
0,+0.200
31.376
0,+0.200
34.376
0,+0.200
37.376
0,+0.200
40.376
0,+0.200
24.835
0,+0.224
27.835
0,+0.224
30.835
0,+0.224
33.835
0,+0.224
36.835
0,+0.224
39.835
0,+0.224
42.835
0,+0.224
49.835
0,+0.236
57.835
0,+0.236
61.835
0,+0.236
69.835
0,+0.236
2
布锥
管螺纹基本尺寸及公差（牙形角
60
°
）
NPT, Z
标号
螺纹代号
大径
基面上的直径
中径
小径
螺纹长度
管端至基面长
有效长度
端面大径
-02
Z1/8
-04
Z1/4
-06
Z3/8
-08
Z1/2
-12
Z3/4
-16
Z1
-20
Z1.1/4
-24
Z1.1/2
-32
Z2
-40
Z2.1/2
”
x8
-48
Z3
”
x8
10.242
13.616
17.055
21.223
26.568
33.228
41.985
48.054
60.092
72.699
88.608
9.489
12.487
15.926
19.772
25.117
31.461
40.218
46.287
58.325
70.159
86.068
8.736
11.385
14.797
18.321
23.666
29.694
38.451
44.520
56.558
67.619
83.528
4.102
5.786
6.096
8.128
8.611
10.160
10.668
10.668
11.074
17.323
19.456
6.703
10.206
10.358
13.556
13.861
17.343
17.953
18.377
19.215
28.892
30.480
9.986
13.254
16.674
20.715
26.030
32.593
41.318
47.387
59.400
71.616
87.392
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