《各国标准-螺纹基本尺寸对照表》由会员分享，可在线阅读，更多相关《各国标准-螺纹基本尺寸对照表（12页珍藏版）》请在金锄头文库上搜索。
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+0.54100
2、-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+0.64000-0.1800-0.3600-0.3600-0.360G1.1/2114
3、7.80346.32444.854+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+0.64
4、000-0.2170-0.4340-0.4340-0.434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R1/8289.7289.1478.5664.04.93.16.57.45.61.1R1/41913.15712.30111.4456.07.34.79.711.08.41.7R3/81916.66215.80614.9506.47.75.110.111.48.81.7R1/21420.95519.79318.6318.210.06.413.215.011.42.3R3/414
5、26.44125.27924.1179.511.37.714.516.312.72.3R11133.24931.77030.29110.412.78.116.819.114.52.9R1.1/41141.91040.43138.95212.715.010.419.121.416.82.9R1.1/21147.80346.32444.84512.715.010.419.121.416.82.9R21159.61458.13556.65615.918.213.623.425.721.12.9R2.1/2”X1175.18473.70572.22617.521.014.026.730.223.23.
6、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7/1620UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.1131/220UNF12.66712.46111.84111.73211.15611.3281
7、1.60811.87512.01712.79/1618UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.2883/416UNF19.01218.77317.98117.85417.1217.32317.67818.01918.18419.057/814UNF22.18421.92321.00620.86920.02520.26920.67621.04621.22422.2251-1/1612UN26.94426.65525.5725.42524.42524.68925.14625.61325.80126.9881-5/1612
8、UN33.29433.00531.9231.77330.77531.03931.49631.96332.15433.3381-5/812UN41.22940.9439.88539.70538.7138.98939.44639.90140.09441.2751-7/812UN47.57947.2946.20546.05345.0645.33945.79646.25146.44947.6252-1/212UN63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5ORFS螺纹9/1618UNF14.25214.03113.33513.221
9、12.57312.75113.08113.37113.5214.28811/1616UN17.42717.18816.39616.27415.53515.74816.10416.43116.58917.46313/1616UN20.59920.36119.56819.44418.70718.92319.27919.60619.76620.638114UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.41-3/1612UN30.11929.8328.74528.59827.627.86428.32128.78828.97930
10、.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5/818UNF15.83915.61814.92314.80314.16114.35114.68114.95815.1115.8751-1/1614UN26.94726.683
11、25.74325.60824.7424.96825.37525.78325.96126.987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Z1/82710.2729.5198.76674.572Z1/41813.57212.44311.3149.55.080Z3/81817.05515.92614.79710.56.096Z1/21421.22319.77218.32113.58.028Z3/41426.56825.11723.666148.611Z111.533.22
