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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Gl/8”X289.7289.1478.566+0.170+0,28200-0.1070-0.2140-0.2140-0.214G1A〃X1913.15712.30111,445+0.125+0.445-0.125-0.250-0.2500-0.250G的〃X1916.66215.80614.950+0.1250+0.44500-0.1250-0.2500-0.2500-0.250G1/2Z,X1420.95519.79318.631+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G5咫"X1422.91121.74920.587+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G列”X1426.44125.27924.117+0.1420+0.54100-0.1420-0.2840-0.2840-0.284Gl"X1133.24931.77030.291+0.1800+0,64000-0.1800-0.3600-0.3600-0.360G1.“X1141.91040.43138.952+0.1800+0,64000-0.1800-0.3600-0.3600-0.360G1M”X1147.80346.32444,854+0.1800+0,64000-0.1800-0.3600-0.3600-0.360G2"X1159.61458.13556.656+0.1800+0,64000-0.1800-0.3600-0.3600-0.360G2.1/2^XU75.18473.70572.226+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/TX11100.33098.85197.372+0.2170+0.64000-0.2170-0.4340-0.4340-0.434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Rl/8”X289.7289.1478.5664.04.93.16.57.45.61.1Rl/4"X1913.15712.30111.4456.07.34.79.711.08.41.7R招"X1916,66215.80614.9506.47.75.110.111.48.81.7RV2"X1420.95519.79318.6318.210.06.413.215.011.42.3R利“X1426.44125.27924.1179.511.37.714.516.312.72.3Rl〃X1133.24931.77030.29110.412.78.116.819.114.52.9RI.*X1141.91040.43138.95212.715.010.419.121.416.82.9R1.V2〃Xll47.80346.32444.84512.715.010.419.121.416.82.9R2"Xll59.61458.13556.65615.918.213.623.425.721.12.9R2.V2〃X1175.18473.70572.22617.521.014.026.730.223.23.5R3〃X1187.88486.40584.92620.624.117.129.833.326.33.5R3.VTX11100.33098.85197.37222.225.718.731.434.927.93.5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螺纹力16"X20UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.113l/2r,X20UNF12.66712.46111.84111.73211.15611.32811.60811.87512.01712.79/16"X18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.288芈〃X16UNF19.01218.77317.98117.85417.1217.32317.67818.01918.18419.057/8,fX14UNF22.18421.92321.00620.86920.02520.26920.67621.04621.22422.2251-1/16X12UN26.94426.65525.5725.42524.42524.68925.14625.61325.80126.9881-5/16,fX12UN33.29433.00531.9231.77330.77531.03931.49631.96332.15433.3381-5R”X12UN41.22940.9439.88539.70538.7138.98939.44639.90140.09441.2751-7/8,fX12UN47.57947.2946.20546.05345.0645.33945.79646.25146.44947.6252-3X12UN63.45263.16262.07861.9260.93261.21461,67162.12662.33263.5ORFS螺纹9/16"X18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.28811/16〃X16UN17.42717.18816.39616.27415.53515.74816,10416.43116.58917.4631夕16"X16UN20.59920.36119.56819.44418.70718.92319.27919.60619.76620.6381"X14UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.41-歹16"X12UN30.11929.8328.74528.59827.627.86428.32128.78828.97930.1631-力16”X12UN36.46736.17735.09334.94333.94734.21434.67135.13835.33136.5131-11/16Z,X12UN42.81742.52741.44341.2940.29740.56441.02141.48841.68642.8632"X12UN50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8SAE螺纹酩"X18UNF15.83915.61814.92314.80314.16114.35114.68114.95815.1115.8751-1/16Z,X14UN26.94726.68325.74325.60824.7424.96825.37525.78325.96126.987其它美制螺纹9/16"X16UN14.25214.01313.22113.10112.3612.57312.92913.25613.41114.2881巾"X12UN22.18221.89220.80820.66819.66219.93920.39620,85121.03422.2252-9"X12UN57.10456.81555.7355.57554.58554.86455.32155.77655.97657.15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X2710.2729.5198.76674.572Z1/4"X1813.57212.44311.3149.55.080Z的"X1817.05515.92614.79710.56.096Zl/2"X1421.22319.77218.32113.58.028Z^TX1426.56825.11723.666148.611Zl”X11.533.22831.46129.69417.510.160Z1.1A"X11.541.98540.21838.4511810.688Zl.1/2"X11.548.05446.28744.52018.510.688Z2"X11.560.09258.32556.5581911.074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+0.1600+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+0.3000+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+0.2360+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+0.3750-0.032-0.182-0.032-0.268M33X1.53332.02631.376+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+0.3750-0.032-0.182-0.032-0.268M27X22725.70124.835+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
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