常用螺纹尺寸及公差汇总表

公制螺纹
基本直径内螺纹公差等级外螺纹公差
6H7H6G
大径中径小径
中径公差小径公
差
中径公
0,差
小径公差中径公差小径公差
M10*1109.358.9170,+0.1500,+0.2360,+0.1900,+0.300-0.026,-0.138-0.026,0.206
M12*11211.3510.9170,+0.1600,+0.2360,+0.2000,+0.300-0.026,-0.144-0.026,0.206
M14*11413.35122.9170,+0.1600,+0.2360,+0.2000,+0.300-0.026,-0.144-0.026,0.206
M12*1.251211.18810.6470,+0.1800,+0.2650,+0.2240,+0.335-0.028,-0.160-0.028,-0.240 M14*1.251413.18812.6470,+0.1800,+0.2650,+0.2240,+0.335-0.028,-0.160-0.028,-0.240 M12*1.51211.02610.3760,+0.1900,+0.3000,+0.2360,+0.375-0.032,-0.172-0.032,-0.268 M14*1.51413.02612.3760,+0.1900,+0.3000,+0.2360,+0.375-0.032,-0.172-0.032,-0.268 M16*1.51615.02614.3760,+0.1900,+0.3000,+0.2360,+0.375-0.032,-0.172-0.032,-0.268 M18*1.51817.02616.3760,+0.1900,+0.3000,+0.2360,+0.375-0.032,-0.172-0.032,-0.268 M20*1.52019.02618.3760,+0.1900,+0.3000,+0.2360,+0.375-0.032,-0.172-0.032,-0.268 M22*1.52221.02620.3760,+0.1900,+0.3000,+0.2360,+0.375-0.032,-0.172-0.032,-0.268 M24*1.51423.02622.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M26*1.52625.02624.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M27*1.52726.02625.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M30*1.53029.02628.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M33*1.53332.02631.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M36&1.53635.02634.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M39*1.53938.02637.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M42*1.54241.02640.3760,+0.2000,+0.3000,+0.2500,+0.375-0.032,-0.182-0.032,-0.268 M27*22725.70124.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M30*23028.70127.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M33*23331.70130.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M36*23634.70133.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M39*23937.70136.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M42*24240.70139.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M45*24543.70142.8350,+0.2240,+0.3750,+0.2800,+0.475-0.038,-0.208-0.038,-0.318 M52*25250.70149.8350,+0.2360,+0.3750,+0.3000,+0.475-0.038,-0.218-0.038,-0.318 M60*26058.70157.8350,+0.2360,+0.3750,+0.3000,+0.475-0.038,-0.218-0.038,-0.318 M64*26462.70161.8350,+0.2360,+0.3750,+0.3000,+0.475-0.038,-0.218-0.038,-0.318 M72*27270.70169.8350,+0.2360,+0.3750,+0.3000,+0.475-0.038,-0.218-0.038,-0.318
美制NPSM螺纹（美国标准ANSI B1.20.1机械连接用直管螺纹60
度）
外螺纹（2A级）内螺纹（2B级）
大径中径小径中径标号螺纹代号
最大值最小值最大值最小值最小值最大值最小值最大值
021/8-27NPSM 10.084
9.9069.4629.370
9.093
9.246
9.489
9.609
041/4-18NPSM 13.36013.132
12.45412.342
11.887
12.217
12.487
12.634
063/8-18NPSM 16.81516.58615.89015.776
15.316
15.545
15.926
16.076
081/2-14NPSM 20.90420.65019.73319.604
18.974
19.279
19.771
19.942
123/4-14NPSM 26.26426.01025.07724.943
24.333
24.638
25.118
25.293
161-11.5NPSM 32.84232.53731.41731.270
30.505
30.759
31.460
31.653
20 1.1/4-11.5NPSM 41.60541.30040.17340.020
39.268
39.497
40.218
40.416
24 1.1/2-11.5NPSM 47.67647.37146.24146.086
45.339
45.568
46.286
46.487
322-11.5NPSM 59.71559.41158.27858.120
57.379
57.607
58.326
58.532
40 2.1/2-8NPSM 72.16171.78070.10469.916
68.783
69.266
70.160
70.409
483-8NPSM 88.06287.68186.00985.816
84.684
85.166
86.068
86.319
NPT 布锥管螺纹
基面上的直径螺纹长度
标号螺纹代号
大径中径小径
管端至基面长
有效长度
端面大径
02
Z1/8*2710.2429.4898.736 4.102 6.7039.98604Z1/4*1813.61612.487
11.385
5.78610.20613.25406Z3/8*1817.05515.92614.797
6.09610.35816.67408Z1/2*1421.22319.77218.3218.12813.55620.71512Z3/4*1426.56825.11723.6668.61113.86126.03016Z1*11.533.22831.46129.69410.1601
7.34332.59320Z1.1/4*1.541.98540.2183
8.45110.66817.95341.31824Z1.1/2*11.548.05446.287
44.52010.66818.37747.38732Z2*11.560.09258.32556.55811.07419.21559.40040Z2.1/2*872.69970.15967.61917.32328.89271.61648Z3*8
88.60886.06883.52819.45630.48087.39255度英锥管螺纹
基本直径
内螺纹
外螺纹公差等级
A
B 标号
螺纹代号
大径中径
小径
中径公差
小径公差
中径公差
大径公差
中径公差
大径公差
02
G1/8*28
9.728
9.147
8.566
0.170，0
0.282，0
0，-0.170
0，-0.214
0，-0.214
0，-0.214
04
G1/4*19
13.157
12.301
11.445
0.125，0
0.445，0
0.-0.125
0，-0.250
0，-0.250
0，-0.250
06
G3/8*19
16.662
15.806
14.950
0.125，0
0.445，0
0，-0.125
0，-0.250
0，-0.250
0，-0.250
08
G1/2*14
20.955
19.793
18.631
0.142，0
0.541，0
0，-0.142
0，-0.284
0，-0.284
0，-0.284
10
G5/8*14
22.911
21.749
20.587
0.142，0
0.541，0
0，-0.142
0，-0.284
0，-0.284
0，-0.284
12
G3/4*14
26.441
25.279
24.117
0.142，0
0.541，0
0，-0.142
0，-0.284
0，-0.284
0，-0.284
16
G1*11
33.249
31.770
30.291
0.180，0
0.640，0
0，-0.180
0，-0.360
0，-0.360
0，-0.360
20
G1.1/4*1
1
41.910
40.431
38.952
0.180，0
0.640，0
0，-0.180
0，-0.360
0，-0.360
0，-0.360
24
G1.1/2*1
1
47.803
46.324
44.845
0.180，0
0.640，0
0，-0.180
0，-0.360
0，-0.360
0，-0.360
32
G2*1159.61458.13556.656
0.180，00.640，0
0，-0.180
0，-0.360
0，-0.360
0，-0.360
40
G2.1/2*1
175.18473.70572.2260.217，00.640，0
0，-0.217
0，-0.434
0，-0.434
0，-0.434
48
G3*1187.88486.40584.9260.217，00.640，0
0，-0.217
0，-0.434
0，-0.434
0，-0.434
55度英锥管螺纹
基面上的直径
基准长度
有效螺纹长度
标号
螺纹代号大径中径小径基本最大最小
基本
最大
最小
圆锥内螺纹基面轴向位移的极限偏
差
端面大径
02
R1/8*289.7289.1478.5664 4.9 3.1
6.5
7.4 5.6
1.1
9.478
04
R1/4*1913.157
12.30111.44567.3 4.7
9.7
11
8.4 1.7
12.782
06
R3/8*1916.66215.80614.950 6.47.7 5.1
10.1
11.4
8.8 1.7
16.262
08
R1/2*1420.95519.79318.6318.210
6.413.21511.4
2.320.443
12
R3/4*1426.44125.27924.1179.511.37.714.516.312.7 2.325.84716
R1*1133.24931.77030.29110.412.78.116.819.114.5 2.932.59920
R1.1/4*1
141.91040.43138.95212.71510.419.121.416.8 2.941.11624
R1.1/2*1
147.80346.32444.84512.71510.419.121.416.8 2.947.00932
R2*1159.61458.13556.65615.918.213.623.425.721.1 2.958.62040
R2.1/2*1
175.18473.70572.22617.5211426.730.223.2 3.574.09048
R3*1187.88486.40584.92620.624.117.129.833.326.3 3.586.597美制螺纹
外螺纹
内螺纹公差等级2A
公差等级2B
大径
中径
小径
中径
标号
螺纹代号
最大最小最大最小小径
最大最小最大最小最大大径最小JIC 螺纹
02
5/16×24UNF 7.910
7.727
7.221
7.127 6.650
6.782
7.0367.2497.371
7.938
03
3/8*24UNF
9.497
9.314
8.809
8.712
8.237
8.382
8.636
8.837
8.961
9.525
04
7/16*20UNF
11.079
10.874
10.254
10.147
9.568
9.728
10.033
10.287
10.424
11.113
05
1/2*20UNF
12.667
12.461
11.841
11.732
11.156
11.328
11.608
11.875
12.017
12.7
06
9/16*18UNF
14.252
14.031
13.335
13.221
12.573
12.751
13.081
13.371
13.52
14.288
08
3/4*16UNF
19.012
18.773
17.981
17.854
17.12
17.323
17.678
18.019
18.184
19.05
10
7/8*14UNF
22.184
21.923
21.006
20.869
20.025
20.269
20.676
21.046
21.224
22.225
12
1.1/16*12UNF
26.944
26.655
25.57
25.425
24.425
24.689
25.146
25.613
25.801
26.988
16
1.5/16*12UNF
33.294
33.005
31.92
31.773
30.775
31.039
31.496
31.963
32.154
33.338
20
1.5/8*12UNF
41.229
40.94
39.855
39.705
38.71
38.989
39.446
39.901
40.094
41.275
24
1.7/8*12UNF
47.579
47.29
46.205
46.05345.06
45.339
45.796
46.251
46.449
47.625
32
2.1/2*12UNF
63.452
63.162
62.078
61.92
60.932
61.214
61.671
62.126
62.332
63.5
40
3812UNF
76.157
75.862
74.778
74.618
73.632
73.914
74.371
74.826
75.034
76.2
18HK
1.1/2*10UNF
38.052
37.724
36.401
36.23835.029
35.357
35.890
36.449
36.660
38.100
ORFS 螺纹
04
9/16*18UNF
14.252
14.031
13.335
13.221
12.573
12.751
13.081
13.371
13.52
14.288
06
11/16*16UNF
17.427
17.188
16.396
16.27415.535
15.748
16.104
16.431
16.589
17.463
08
13/16*16UNF
20.59920.36119.56819.44418.70718.923
19.279
19.606
19.766
20.638
10
1*14UNSF
25.35725.09524.17824.03623.19523.444
23.825
24.221
24.407
25.4
12
1.3/16*12UN
30.11929.8328.75428.59827.627.864
28.321
28.788
28.979
30.163
16
1.7/16*12UN
36.46736.17735.09334.94333.94734.214
34.671
35.138
35.331
36.513
20
1.11/16*12UN
42.81742.52741.44341.2940.29740.564
41.021
41.488
41.686
42.863
24
2*12UN
50.75450.46549.3849.2548.23548.514
48.971
49.426
49.627
50.8SAE 螺纹
06
5/8×18UNF 15.83915.61814.92314.80314.16114.35114.68114.95815.1115.875
12
1.1/16*14UNF
26.94726.683 25.74325.60824.7424.96825.37525.78325.96126.987其他美制螺纹9/16*16UN
14.25214.01313.22113.10112.3612.57312.92913.25613.41114.2887/8*12UN
22.18221.89220.80820.66819.66219.93920.39620.85121.03422.2252.1/4*12UN
57.10456.81555.7355.57554.58554.86455.32155.77655.97657.15可拆式芯子与套筒连接螺纹
外螺纹内螺纹公差等级2B 大径
中径
小径
中径
软管编号
螺纹代号
最大
最小最大最小小径最小最大最小最大大径R5-04
9/32*32
7.120
6.967 6.604 6.523 6.175 6.294 6.472 6.629 6.736
7.145R5-05
46/127*28
9.197
9.0328.6088.5168.1158.2348.4638.6368.7539.225R5-06
107/254*28
10.685
10.52010.09510.0049.6039.7359.93810.12310.24010.713R5-08
9/16*24
14.257
14.07413.56913.47012.99713.13213.38613.59913.72914.288R5-10
11/16*24
17.432
17.24916.74416.64216.17216.30716.56116.77416.90617.463R5-12
13/16*20
20.599
20.39919.77919.66719.34719.25319.55819.81219.98220.638R5-16
1.1/16*18
26.952
26.73126.03525.91625.27325.45125.78126.07126.22826.988R5-20
1.5/16*18
33.299
33.07832.38232.25831.62031.80132.13132.42132.58133.338R5-24
1.9/16*18
39.649
39.428
38.732
38.605
37.970
38.151
38.481
38.771
38.936
39.688
R5-32
2*18
50.762
50.541
49.845
49.715
49.083
49.276
49.606
49.883
50.053
50.800
2A-04
7/16*20
11.079
10.874
10.254
10.147
9.568
9.728
10.033
10.287
10.424
11.113
2A-06
9/16*18
14.252
14.031
13.335
13.221
12.573
12.751
13.081
13.371
13.520
14.288
2A-08
5/8*18
15.839
15.618
14.923
14.803
14.161
14.351
14.681
14.958
15.110
15.875
2A-10
3/4*18
19.014
18.793
18.098
17.981
17.336
17.526
17.856
18.133
18.285
19.050
2A-12
7/8*18
22.189
21.968
21.273
21.156
20.511
20.701
21.031
21.308
21.460
22.225
2A-16
1.3/16*16
30.124
29.870
29.093
28.964
28.232
28.448
28.804
29.131
29.299
30.163
2A-20
1.9/16*18
39.64939.428
38.732
38.605
37.970
38.151
38.481
38.771
38.936
39.688
新西兰B09内螺纹
标号你螺纹代号大径MIN中径MIN中径MAX小径MIN小径MAX B-090.860in*1421.84420.68320.84119.522
NPTF+密封管螺纹
标号螺纹代号外螺纹
小端中
径外螺纹
大端中
径
外螺纹
小端大
径最小
外螺纹
小端大
径最大
外螺纹
全牙长
度
内螺纹
大端中
径
内螺纹
小端中
径
内螺纹
大端小
径最小
内螺纹
大端小
径最大
内螺纹
全牙长
度
21/8-27NPTF9.2339.6529.8719.960 6.7039.4899.0588.7638.851 6.924 41/4-18NPTF12.12612.76413.12813.21510.20612.48711.86211.39811.48610.020 63/8-18NPTF15.54516.19316.54716.63410.35815.92615.28114.83714.92410.330 81/2-14NPTF19.26420.11120.61620.70313.55619.77218.92618.33318.42013.571 123/4-14NPTF24.57925.44525.93126.01813.86125.11724.23923.67823.76814.054 161-11.5NPTF30.82631.91032.47432.56217.34331.46130.41129.72529.81316.787 20 1.1/4-11.5NPTF39.55140.67341.19941.28717.95340.21839.13638.48238.57017.295 24 1.1/2-11.5NPTF45.62146.76947.26947.35718.37746.28745.20744.55144.64017.295 322-11.5NPTF57.63358.83459.28159.36919.21558.32557.21956.58956.67717.701 40 2.1/2-8NPTF69.07670.88271.47671.55928.89370.15968.48167.67667.75926.848 483-8NPTF84.85286.75787.25287.33530.48086.06884.25783.58583.66828.981备注：1.表中外螺纹的完整螺纹长度包括不超过一个螺距长度的倒角
2.表中内螺纹的完整螺纹长度不包括在中径线和倒角交线外的锥口孔。

即完整螺纹
长度的等于完整内螺纹加一个螺距。