螺纹基本尺寸对照表

1、.；英制管螺纹基本尺寸及公差（牙形角55） 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G1/8289.7289.1478.566+0.170+0.28200-0.1070-0.2140-0.2140-0.214G1/41913.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250G3/81916.66215.80614.950+0.1250+0.44500-0.1250-0.2500-0.2500-0.250G1/21420.95519.79318.631+0.1420+0.541

2、00-0.1420-0.2840-0.2840-0.284G5/81422.91121.74920.587+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G3/41426.44125.27924.117+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G11133.24931.77030.291+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G1.1/41141.91040.43138.952+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G1.1/21

3、147.80346.32444.854+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G21159.61458.13556.656+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G2.1/2”X1175.18473.70572.226+0.2170+0.64000-0.2170-0.4340-0.4340-0.434G3”X1187.88486.40584.926+0.2170+0.64000-0.2170-0.4340-0.4340-0.434G3.1/2”X11100.33098.85197.372+0.2170+0.

4、64000-0.2170-0.4340-0.4340-0.434英制锥管螺纹基本尺寸及公差（牙形角55） 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R1/8289.7289.1478.5664.04.93.16.57.45.61.1R1/41913.15712.30111.4456.07.34.79.711.08.41.7R3/81916.66215.80614.9506.47.75.110.111.48.81.7R1/21420.95519.79318.6318.210.06.413.215.011.42.3R3/4

5、1426.44125.27924.1179.511.37.714.516.312.72.3R11133.24931.77030.29110.412.78.116.819.114.52.9R1.1/41141.91040.43138.95212.715.010.419.121.416.82.9R1.1/21147.80346.32444.84512.715.010.419.121.416.82.9R21159.61458.13556.65615.918.213.623.425.721.12.9R2.1/2”X1175.18473.70572.22617.521.014.026.730.223.2

6、3.5R3”X1187.88486.40584.92620.624.117.129.833.326.33.5R3.1/2”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60） 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7/1620UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.1131/220UNF12.66712.46111.84111.73211.15611.32

7、811.60811.87512.01712.79/1618UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.2883/416UNF19.01218.77317.98117.85417.1217.32317.67818.01918.18419.057/814UNF22.18421.92321.00620.86920.02520.26920.67621.04621.22422.2251-1/1612UN26.94426.65525.5725.42524.42524.68925.14625.61325.80126.9881-5/16

8、12UN33.29433.00531.9231.77330.77531.03931.49631.96332.15433.3381-5/812UN41.22940.9439.88539.70538.7138.98939.44639.90140.09441.2751-7/812UN47.57947.2946.20546.05345.0645.33945.79646.25146.44947.6252-1/212UN63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5ORFS螺纹9/1618UNF14.25214.03113.33513.2

9、2112.57312.75113.08113.37113.5214.28811/1616UN17.42717.18816.39616.27415.53515.74816.10416.43116.58917.46313/1616UN20.59920.36119.56819.44418.70718.92319.27919.60619.76620.638114UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.41-3/1612UN30.11929.8328.74528.59827.627.86428.32128.78828.979

10、30.1631-7/1612UN36.46736.17735.09334.94333.94734.21434.67135.13835.33136.5131-11/1612UN42.81742.52741.44341.2940.29740.56441.02141.48841.68642.863212UN50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8SAE螺纹5/818UNF15.83915.61814.92314.80314.16114.35114.68114.95815.1115.8751-1/1614UN26.94726.6

11、8325.74325.60824.7424.96825.37525.78325.96126.987其它美制螺纹9/1616UN14.25214.01313.22113.10112.3612.57312.92913.25613.41114.2887/812UN22.18221.89220.80820.66819.66219.93920.39620.85121.03422.2252-1/412UN57.10456.81555.7355.57554.58554.86455.32155.77655.97657.15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

12、布锥管螺纹基本尺寸及公差(牙形角60) 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Z1/82710.2729.5198.76674.572Z1/41813.57212.44311.3149.55.080Z3/81817.05515.92614.79710.56.096Z1/21421.22319.77218.32113.58.028Z3/41426.56825.11723.666148.611Z111.533.22831.46129.69417.510.160Z1.1/411.541.98540.21838.4511810.688Z1.1/211.548.05446.2

13、8744.52018.510.688Z211.560.09258.32556.5581911.074公制螺纹基本尺寸及公差(牙形角60) 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+0.1500+0.2360+0.1900+0.3000-0.026-0.138-0.026-0.206M12X11211.35010.917+0.1600+0.2360+0.2000+0.3000-0.026-0.144-0.026-0.206M14X11413.35012.917+0.16

14、00+0.2360+0.2000+0.3000-0.026-0.144-0.026-0.206M12X1.251211.18810.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M14X1.251413.18812.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M12X1.51211.02610.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M14X1.51413.02612.376+0.1900+0.3

15、000+0.2360+0.3750-0.032-0.172-0.032-0.268M16X1.51615.02614.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M18X1.51817.02616.373+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M20X1.52019.02618.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M22X1.52221.02620.376+0.1900+0.3000+0.23

16、60+0.3750-0.032-0.172-0.032-0.268M24X1.52423.02622.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M26X1.52625.02624.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M27X1.52726.02625.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M30X1.53029.02628.376+0.2000+0.3000+0.2500+0.375

17、0-0.032-0.182-0.032-0.268M33X1.53332.02631.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M36X1.53635.02634.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M39X1.53938.02637.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M42X1.54241.02640.376+0.2000+0.3000+0.2500+0.3750-0.032-

18、0.182-0.032-0.268M27X22725.70124.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M30X23028.70127.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M33X23331.70130.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M36X23634.70133.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M39X23937.70136.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M42X24240.70139.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M45X24543.70142.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.