公制螺纹标准对照表
-
2023年3月17日发(作者：双线空间)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″×11
33.24931.77030.291
+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″×11
47.80346.32444.854
+0.180
0
+0.640
0
0
-0.180
0
-0.360
0
-0.360
0
-0.360
G2″×11
59.61458.13556.656
+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
R1″×11
33.24931.77030.29110.412.78.116.819.114.52.9
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″×11
59.61458.13556.65615.918.213.623.425.721.12.9
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
11.07910.87410.25410.1479.5689.72810.03310.28710.42411.113
1/2″×20UNF
12.66712.46111.84111.73211.15611.32811.60811.87512.01712.7
9/16″×18UNF
14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288
3/4″×16UNF
19.01218.77317.98117.85417.1217.32317.67818.01918.18419.05
7/8″×14UNF
22.18421.92321.00620.86920.02520.26920.67621.04621.22422.225
1-1/16″×12UN
26.94426.65525.5725.42524.42524.68925.14625.61325.80126.988
1-5/16″×12UN
33.29433.00531.9231.77330.77531.03931.49631.96332.15433.338
1-5/8″×12UN
41.22940.9439.88539.70538.7138.98939.44639.90140.09441.275
1-7/8″×12UN
47.57947.2946.20546.05345.0645.33945.79646.25146.44947.625
2-1/2″×12UN
63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5
ORFS螺纹
9/16″×18UNF
14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288
11/16″×16UN
17.42717.18816.39616.27415.53515.74816.10416.43116.58917.463
13/16″×16UN
20.59920.36119.56819.44418.70718.92319.27919.60619.76620.638
1″×14UNF
25.35725.09524.17824.03623.19523.44423.82524.22124.40725.4
1-3/16″×12UN
30.11929.8328.74528.59827.627.86428.32128.78828.97930.163
1-7/16″×12UN
36.46736.17735.09334.94333.94734.21434.67135.13835.33136.513
1-11/16″×12UN
42.81742.52741.44341.2940.29740.56441.02141.48841.68642.863
2″×12UN
50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8
SAE螺纹
5/8″×18UNF
15.83915.61814.92314.80314.16114.35114.68114.95815.1115.875
1-1/16″×14UN
26.94726.68325.74325.60824.7424.96825.37525.78325.96126.987
其它美制螺纹
9/16″×16UN
14.25214.01313.22113.10112.3612.57312.92913.25613.41114.288
7/8″×12UN
22.18221.89220.80820.66819.66219.93920.39620.85121.03422.225
2-1/4″×12UN
57.10456.81555.7355.57554.58554.86455.32155.77655.97657.15
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
大径中径小径有效长度管端至基面长
Z1/8″×27
10.2729.5198.76674.572
Z1/4″×18
13.57212.44311.3149.55.080
Z3/8″×18
17.05515.92614.79710.56.096
Z1/2″×14
21.22319.77218.32113.58.028
Z3/4″×14
26.56825.11723.666148.611
Z1″×11.5
33.22831.46129.69417.510.160
Z1.1/4″×11.5
41.98540.21838.4511810.688
Z1.1/2″×11.5
48.05446.28744.52018.510.688
Z2″×11.5
60.09258.32556.5581911.074
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
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+0.375+0.280+0.475-0.038-0.038
0000-0.208-0.318
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
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
55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达
55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达
55°圆锥管螺纹(BSPT)
螺
纹
代
号
基本
尺寸
英寸
大
径
mm
d=
D
螺
距
mm
p
每
英
寸
牙
数
tpi
中
径
mm
d2
=D
2
小
径
外
螺
纹
d
3
牙型高度
H1
R
1
/
1
6
1/1
6"
7.7
23
0.9
07
28
7.1
42
6.
5
6
1
0.581
R
1
/
8
1/8
"
9.7
28
0.9
07
28
9.1
47
8.
5
6
6
0.581
R
1
/
1/4
"
13.
157
1.3
37
19
12.
301
1
1.
4
4
0.856
45
R
3
/
8
3/8
"
16.
662
1.3
37
19
15.
806
1
4.
9
5
0
0.856
R
1
/
2
1/2
"
20.
955
1.8
14
14
19.
793
1
8.
6
3
1
1.162
R
3
/
4
3/4
"
26.
441
1.8
14
14
25.
279
2
4.
1
1
7
1.162
R
1
1"
33.
249
2.3
09
11
31.
77
3
0.
2
9
1
1.479
R
1
1
/
4
1
1/4
"
41.
910
2.3
09
11
40.
431
3
8.
9
5
2
1.479
R
1
1
/
1
1/2
"
47.
803
2.3
09
11
46.
324
4
4.
8
4
1.479
25
R
2
2"
59.
614
2.3
09
11
58.
135
5
6.
6
5
6
1.479
R
2
1
/
2
2
1/2
"
75.
184
2.3
09
11
73.
705
7
2.
2
2
6
1.479
R
3
3"
87.
884
2.3
09
11
86.
405
8
4.
9
2
6
1.479
R
4
4"
113
.03
0
2.3
09
11
111
.55
1
1
1
0.
0
7
2
1.479
R
5
5"
138
.43
0
2.3
09
11
136
.95
1
1
3
5.
4
7
2
1.479
R
6
6"
163
.83
2.3
09
11
162
.35
1
6
0.
1.479
018
7
2
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管螺纹的基本尺寸表
(2010-10-2515:57:35)
标
签：
表（1）螺纹基本尺寸G1/2、
ZG1/2(单位:mm)
尺寸代
号
每
25.4mm
类的牙
数n
螺距p牙型
高度h
圆弧半
径r≈
基面上的基本直径基准
距离
有效
螺纹
长度
大径（基
准直径）
d=D
中径
d2=D2
小径
d1=D1
1/16280.9070.5810.1257.7237.1426.5614.06.5
1/8280.9070.5810.1259.7289.1478.5664.06.5
1/4191.3370.5860.18413.15712.30111.4456.09.7
3/8191.3370.5860.18416.66215.80614.9506.410.1
1/2141.8141.1620.24920.95519.79318.6318.213.2
3/4141.8141.1620.24926.44125.27924.1179.514.5
1112.3091.4790.31733.24931.77030.29110.416.8
1.1/4112.3091.4790.31741.91040.43138.95212.719.1
1.1/2112.3091.4790.31747.80346.32444.84512.719.1
2112.3091.4790.31759.61458.13556.65615.923.4
2.1/2112.3091.4790.31775.18473.70572.22617.526.7
3112.3091.4790.31787.88486.40584.92620.629.8
3.1/2112.3091.4790.317100.33098.85197.37222.231.4
4112.3091.4790.317113.030111.551110.07225.435.8
5112.3091.4790.317138.430136.951135.47228.640.1
6112.3091.4790.317163.830162.351160.87228.640.1
锥管螺纹的基本尺寸表（3-28）1/2PT、1/2NPT
表（2）螺纹基本尺寸(单位:mm)
尺寸代
号
每
25.4mm
类的牙
数n
基面上的基本直径基准距离
大径（基
准直径）
d=D
中径
d2=D2
小径
d1=D1
1/16277.8957.1426.3894.064
1/82710.2429.4898.7364.102
1/41813.61612.48711.3585.786
3/81817.05515.92614.7976.096
1/21421.22319.77218.3218.128
3/41426.56825.11723.6668.611
111.533.22831.46129.69410.160
1.1/411.541.98540.21838.45110.668
1.1/211.548.05446.28744.52010.668
211.560.09258.32556.55811.074
2.1/2872.69970.15967.61917.323
3888.60886.06883.52819.456
3.1/28101.31698.77696.23620.853
48113.973111.433108.89321.438
寸
Ww
牙型代
号
大径
mm
d=D
螺距
mm
p
每英寸牙
数
tpi
中径
mm
d2=D2
小径
外螺纹
d3
牙型
高
H1
底孔直
径
mm
1/16"BSW1.5870.423601.3151.0500.2701.15
3/32"BSW2.3810.529482.0411.7030.3381.90
1/8"BSW3.1750.635402.7682.3620.4062.50
5/32"BSW3.9690.793323.4592.9520.5073.20
3/16"BSW4.7621.058244.0843.4070.6773.70
7/32"BSW5.5561.058244.8784.2010.6774.50
1/4"BSW6.3501.270205.5374.7240.8135.10
5/16"BSW7.9381.411187.0346.1310.9046.50
3/8"BSW9.5251.588168.5097.4921.0177.90
7/16"BSW11.1131.814149.9518.7891.1629.20
1/2"BSW12.7002.1171211.3459.9901.35510.40
5/8"BSW15.8762.3091114.39712.9181.47913.40
3/4"BSW19.0512.5401017.42415.7981.62716.25
7/8"BSW22.2262.822920.41918.6111.80719.25
1"BSW25.4003.175823.36821.3352.03322.00
11/
8"
BSW28.5763.629726.25323.9292.32424.50
11/
4"
BSW31.7513.629729.42827.1042.32427.25
13/
8"
BSW34.9264.233632.21529.5052.71130.25
11/
2"
BSW38.1004.233635.39132.6802.71133.50
15/
8"
BSW41.2775.080538.02434.7713.25335.50
13/
4"
BSW44.4525.080541.19937.9463.25338.50
17/
8"
BSW47.6275.64541/244.01240.3983.61441.25
2"BSW50.8025.64541/247.18743.5733.61444.50
21/
4"
BSW57.1526.350453.08649.0204.06650.00
21/
2"
BSW63.5026.350459.43655.3704.06656.00
23/
4"
BSW69.8537.25731/265.20560.5584.64761.50
3"BSW76.2037.25731/271.55666.9094.64768.00
31/
4"
BSW82.5537.81631/477.54872.5445.00573.75
31/
2"
BSW88.9037.81631/483.89978.8945.00580.00
33/
4"
BSW95.2548.467389.83284.4105.42285.50
4"BSW
101.60
4
8.467396.18290.7605.42292.00
41/
4"
BSW
107.95
4
8.83527/8102.29796.6395.65798.00
41/
2"
BSW
114.30
4
8.83527/8108.647
102.99
0
5.657104.20
43/
4"
BSW
120.66
5
9.23723/4114.740
108.62
5
5.915110.00
5"BSW
127.00
5
9.23723/4121.090
115.17
6
5.915116.50
51/
4"
BSW
133.35
5
9.67725/8127.159
120.96
3
6.196122.50
51/
2"
BSW
139.70
5
9.67725/8133.509
127.31
3
6.196128.50
53/
4"
BSW
146.05
5
10.16
0
21/2139.549
133.04
3
6.506134.50
6"BSW
152.40
6
10.16
0
21/2145.900
139.39
4
6.506141.00
英制普通螺纹--细牙--BSF
英制普通螺纹(惠氏螺纹)--细
牙(BSW)
名义尺寸
BSF
牙型代号
大径
mm
d=D
螺距
mm
p
每英寸牙数
tpi
中径
mm
d2=D2
小径
外螺纹
d3
牙型高
H1
底孔直径
mm
3/16BSF4.7630.794324.2553.7470.5084.00
7/32BSF5.5560.907284.9754.3940.5814.60
1/4BSF6.3500.977265.7255.1000.6255.30
9/32BSF7.1420.977266.5185.8930.6256.10
5/16BSF7.9381.156227.1996.4590.7396.80
3/8BSF9.5251.27208.7127.8990.8138.30
7/16BSF11.1131.4111810.2099.3040.9049.70
1/2BSF12.7001.5881611.68410.6681.01711.10
9/16BSF14.2881.5881613.27212.2561.01712.70
5/8BSF15.8751.8141414.71213.5491.16214.00
11/16BSF17.4631.8141416.30015.1371.16215.50
3/4BSF19.0502.1171217.69316.3361.35516.75
13/16BSF20.6382.1171219.28117.9241.35518.25
7/8BSF22.2252.3091120.74719.2691.47919.75
1BSF25.4002.541023.77422.1481.62722.75
11/8BSF28.5752.822926.76924.9631.80726.50
11/4BSF31.7502.822929.94428.1381.80728.75
13/8BSF34.9253.175832.89330.8612.03331.50
11/2BSF38.1003.175836.06834.0362.03334.50
15/8BSF41.2753.175839.24337.2112.03338.00
13/4BSF44.4503.629742.12639.8022.32440.50
2BSF50.8003.629748.47646.1522.32447.00
21/4BSF57.1504.234654.44051.7302.71153.00
21/2BSF63.5004.234660.79058.0802.71159.00
23/4BSF69.8504.234667.14064.4302.711-
3BSF76.2005.08572.94669.6923.253-
31/4BSF82.5505.08579.29676.0423.253-
31/2BSF88.9005.64541/285.28581.6703.614-
33/4BSF95.2505.64541/291.63588.0203.614-
4BSF101.6005.64541/297.98594.3703.614-
41/4BSF107.9506.354103.88699.8224.066-
螺纹标记的标注
当螺纹精度要求较高时，除标注螺纹代号外，还应标注螺纹公差带代号和螺纹旋合长度。
螺纹标记的标注格式为：
螺纹代号—螺纹公差带代号(中径、顶径)—旋合长度
有关标注内容的说明：
1)公差带代号由数字加字母表示(内螺纹用大写字母，外螺纹用小写字母)，如7H、6g等，
应特别指出，7H，6g等代表螺纹公差，而H7，g6代表圆柱体公差代号。
2)旋合长度规定为短(用S表示)、中(用N表示)、长(用L表示)三种。一般情况下，不标注
螺纹旋合长度，其螺纹公差带按中等旋合长度(N)确定。必要时，可加注旋合长度代号S或L，
如“M20-5g6g－L”。特殊需要时，可注明旋合长度的数值，如“M20-5g6g－30”。
相关链接