英制螺纹规格直径表
儿童成长自律表-补阙真言全文
2023年2月15日发(作者：等速肌力训练)8
英制管螺纹基本尺寸及公差（牙形角55º）BSPP
螺纹代号
基本直径内螺纹外螺纹
大径中径小径
中径
公差
小径
公差
A级B级
中径
公差
大径
公差
中径
公差
大径公
差
G1/8″×
28
9.7289.1478.566
+0.170+0.282
0
0
-0.107
0
-0.214
0
-0.214
0
-0.214
G1/4″×
19
13.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250
G3/8″×
19
16.66215.80614.950
+0.125
0
+0.445
0
0
-0.125
0
-0.250
0
-0.250
0
-0.250
G1/2″×
14
20.95519.79318.631
+0.142
0
+0.541
0
0
-0.142
0
-0.284
0
-0.284
0
-0.284
G5/8″×
14
22.91121.74920.587
+0.142
0
+0.541
0
0
-0.142
0
-0.284
0
-0.284
0
-0.284
G3/4″×
14
26.44125.27924.117
+0.142
0
+0.541
0
0
-0.142
0
-0.284
0
-0.284
0
-0.284
G1″×1133.24931.77030.291
+0.180
0
+0.640
0
0
-0.180
0
-0.360
0
-0.360
0
-0.360
G1.1/4″×
11
41.91040.43138.952
+0.180
0
+0.640
0
0
-0.180
0
-0.360
0
-0.360
0
-0.360
G1.1/2″×47.80346.32444.854+0.180+0.6400000
8
1100-0.180-0.360-0.360-0.360
G2″×1159.61458.13556.656
+0.180
0
+0.640
0
0
-0.180
0
-0.360
0
-0.360
0
-0.360
G2.1/2”X1175.18473.70572.226
+0.217
0
+0.640
0
0
-0.217
0
-0.434
0
-0.434
0
-0.434
G3”X1187.88486.40584.926
+0.217
0
+0.640
0
0
-0.217
0
-0.434
0
-0.434
0
-0.434
G3.1/2”X11100.33098.85197.372
+0.217
0
+0.640
0
0
-0.217
0
-0.434
0
-0.434
0
-0.434
英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT
螺纹代号
基面上的直径基准长度有效螺纹长度圆锥内螺纹
基面轴向位
移偏差（±
mm）
大径中径小径
基
本
最
大
最
小
基
本
最
大
最
小
R1/8″×
28
9.7289.1478.5664.04.93.16.57.45.61.1
R1/4″×
19
13.15712.30111.4456.07.34.79.711.08.41.7
R3/8″×
19
16.66215.80614.9506.47.75.110.111.48.81.7
R1/2″×
14
20.95519.79318.6318.210.06.413.215.011.42.3
R3/4″×
14
26.44125.27924.1179.511.37.714.516.312.72.3
8
R1″×1133.24931.77030.29110.412.78.116.819.114.52.9
R1.1/4″×
11
41.91040.43138.95212.715.010.419.121.416.82.9
R1.1/2″×
11
47.80346.32444.84512.715.010.419.121.416.82.9
R2″×1159.61458.13556.65615.918.213.623.425.721.12.9
R2.1/2”X1175.18473.70572.22617.521.014.026.730.223.23.5
R3”X1187.88486.40584.92620.624.117.129.833.326.33.5
R3.1/2”X11100.33098.85197.37222.225.718.731.434.927.93.5
美制管螺纹基本尺寸及公差（牙形角60º）UN(F)
螺纹代号
外螺纹内螺纹
公差等级公差等级
2A2B
大径中径小径小径中径大径
最大最小最大最小最小最大最小最大
JIC螺纹
7/16″×
20UNF
11.07
9
10.87
4
10.25
4
10.14
7
9.5689.728
10.03
3
10.28
7
10.42
4
11.11
3
1/2″×
20UNF
12.66
7
12.46
1
11.84
1
11.73
2
11.15
6
11.32
8
11.60
8
11.87
5
12.01
7
12.7
9/16″×
18UNF
14.25
2
14.03
1
13.33
5
13.22
1
12.57
3
12.75
1
13.08
1
13.37
1
13.52
14.28
8
8
3/4″×
16UNF
19.01
2
18.77
3
17.98
1
17.85
4
17.12
17.32
3
17.67
8
18.01
9
18.18
4
19.05
7/8″×
14UNF
22.18
4
21.92
3
21.00
6
20.86
9
20.02
5
20.26
9
20.67
6
21.04
6
21.22
4
22.22
5
1-1/16″×
12UN
26.94
4
26.65
5
25.57
25.42
5
24.42
5
24.68
9
25.14
6
25.61
3
25.80
1
26.98
8
1-5/16″×
12UN
33.29
4
33.00
5
31.92
31.77
3
30.77
5
31.03
9
31.49
6
31.96
3
32.15
4
33.33
8
1-5/8″×
12UN
41.22
9
40.94
39.88
5
39.70
5
38.71
38.98
9
39.44
6
39.90
1
40.09
4
41.27
5
1-7/8″×
12UN
47.57
9
47.29
46.20
5
46.05
3
45.06
45.33
9
45.79
6
46.25
1
46.44
9
47.62
5
2-1/2″×
12UN
63.45
2
63.16
2
62.07
8
61.92
60.93
2
61.21
4
61.67
1
62.12
6
62.33
2
63.5
ORFS螺纹
9/16″×
18UNF
14.25
2
14.03
1
13.33
5
13.22
1
12.57
3
12.75
1
13.08
1
13.37
1
13.52
14.28
8
11/16″×
16UN
17.42
7
17.18
8
16.39
6
16.27
4
15.53
5
15.74
8
16.10
4
16.43
1
16.58
9
17.46
3
13/16″×
16UN
20.59
9
20.36
1
19.56
8
19.44
4
18.70
7
18.92
3
19.27
9
19.60
6
19.76
6
20.63
8
1″×14UNF
25.35
7
25.09
5
24.17
8
24.03
6
23.19
5
23.44
4
23.82
5
24.22
1
24.40
7
25.4
8
1-3/16″×
12UN
30.11
9
29.83
28.74
5
28.59
8
27.6
27.86
4
28.32
1
28.78
8
28.97
9
30.16
3
1-7/16″×
12UN
36.46
7
36.17
7
35.09
3
34.94
3
33.94
7
34.21
4
34.67
1
35.13
8
35.33
1
36.51
3
1-11/16″×
12UN
42.81
7
42.52
7
41.44
3
41.29
40.29
7
40.56
4
41.02
1
41.48
8
41.68
6
42.86
3
2″×12UN
50.75
4
50.46
5
49.38
49.22
5
48.23
5
48.51
4
48.97
1
49.42
6
49.62
7
50.8
SAE螺纹
5/8″×
18UNF
15.83
9
15.61
8
14.92
3
14.80
3
14.16
1
14.35
1
14.68
1
14.95
8
15.11
15.87
5
1-1/16″×
14UN
26.94
7
26.68
3
25.74
3
25.60
8
24.74
24.96
8
25.37
5
25.78
3
25.96
1
26.98
7
其它美制螺纹
9/16″×
16UN
14.25
2
14.01
3
13.22
1
13.10
1
12.36
12.57
3
12.92
9
13.25
6
13.41
1
14.28
8
7/8″×12UN
22.18
2
21.89
2
20.80
8
20.66
8
19.66
2
19.93
9
20.39
6
20.85
1
21.03
4
22.22
5
2-1/4″×
12UN
57.10
4
56.81
5
55.73
55.57
5
54.58
5
54.86
4
55.32
1
55.77
6
55.97
6
57.15
注：UNC粗牙螺纹系列，UNF细牙螺纹系列，UNEF超细牙螺纹系列，UN不变螺距
系列
布锥管螺纹基本尺寸及公差(牙形角60º)NPT
螺纹代号基面上的直径螺纹长度
8
大径中径小径有效长度
管端至基面
长
Z1/8″×2710.2729.5198.76674.572
Z1/4″×1813.57212.44311.3149.55.080
Z3/8″×1817.05515.92614.79710.56.096
Z1/2″×1421.22319.77218.32113.58.028
Z3/4″×1426.56825.11723.666148.611
Z1″×11.533.22831.46129.69417.510.160
Z1.1/4″×
11.5
41.98540.21838.4511810.688
Z1.1/2″×
11.5
48.05446.28744.52018.510.688
Z2″×11.560.09258.32556.5581911.074
公制螺纹基本尺寸及公差(牙形角60º)M
螺纹代号
基本直径内螺纹外螺纹
大径中径小径
公差等级公差等级
6H7H6g
中径公
差
小径公
差
中径公
差
小径公
差
中径公
差
大径公
差
M10X1109.3508.917
+0.150
0
+0.236
0
+0.190
0
+0.300
0
-0.026
-0.138
-0.026
-0.206
M12X11211.35010.917
+0.160
0
+0.236
0
+0.200
0
+0.300
0
-0.026
-0.144
-0.026
-0.206
M14X11413.35012.917
+0.160
0
+0.236
0
+0.200
0
+0.300
0
-0.026
-0.144
-0.026
-0.206
M12X1.251211.18810.647
+0.180
0
+0.265
0
+0.224
0
+0.335
0
-0.028
-0.160
-0.028
-0.240
8
M14X1.251413.18812.647
+0.180
0
+0.265
0
+0.224
0
+0.335
0
-0.028
-0.160
-0.028
-0.240
M12X1.51211.02610.376
+0.190
0
+0.300
0
+0.236
0
+0.375
0
-0.032
-0.172
-0.032
-0.268
M14X1.51413.02612.376
+0.190
0
+0.300
0
+0.236
0
+0.375
0
-0.032
-0.172
-0.032
-0.268
M16X1.51615.02614.376
+0.190
0
+0.300
0
+0.236
0
+0.375
0
-0.032
-0.172
-0.032
-0.268
M18X1.51817.02616.373
+0.190
0
+0.300
0
+0.236
0
+0.375
0
-0.032
-0.172
-0.032
-0.268
M20X1.52019.02618.376
+0.190
0
+0.300
0
+0.236
0
+0.375
0
-0.032
-0.172
-0.032
-0.268
M22X1.52221.02620.376
+0.190
0
+0.300
0
+0.236
0
+0.375
0
-0.032
-0.172
-0.032
-0.268
M24X1.52423.02622.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M26X1.52625.02624.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M27X1.52726.02625.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M30X1.53029.02628.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M33X1.53332.02631.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M36X1.53635.02634.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M39X1.53938.02637.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M42X1.54241.02640.376
+0.200
0
+0.300
0
+0.250
0
+0.375
0
-0.032
-0.182
-0.032
-0.268
M27X22725.70124.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M30X23028.70127.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M33X23331.70130.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M36X23634.70133.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M39X23937.70136.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M42X24240.70139.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M45X24543.70142.835
+0.224
0
+0.375
0
+0.280
0
+0.475
0
-0.038
-0.208
-0.038
-0.318
M52X25250.70149.835
+0.236
0
+0.375
0
+0.300
0
+0.475
0
-0.038
-0.218
-0.038
-0.318
8
M60X26058.70157.835
+0.236
0
+0.375
0
+0.300
0
+0.475
0
-0.038
-0.218
-0.038
-0.318
M64X26462.70161.835
+0.236
0
+0.375
0
+0.300
0
+0.475
0
-0.038
-0.218
-0.038
-0.318
M72X27270.70169.835
+0.236
0
+0.375
0
+0.300
0
+0.475
0
-0.038
-0.218
-0.038
-0.318