螺纹基本尺寸对照表

1、英制管螺纹根本尺寸及公差牙形角55oBSPP螺纹代号根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G1/8X289.7289.1478.566+0.170+0.28200-0.1070-0.2140-0.2140-0.214G1/4x1913.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250G3/8x1916.66215.80614.950+0.1250+0.44500-0.1250-0.2500-0.2500-0.250G1/2x1420.95519.79318.631+0.1420+0.541

2、00-0.1420-0.2840-0.2840-0.284G5/8x1422.91121.74920.587+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G3/4x1426.44125.27924.117+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G1x1133.24931.77030.291+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G1.1/4x1141.91040.43138.952+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G1.

3、1/2x1147.80346.32444.854+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G2x1159.61458.13556.656+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"X1100.33098

4、.85197.372+0.2170+0.64000-0.2170-0.4340-0.4340-0.434英制锥管螺纹根本尺寸及公差牙形角55oBSPT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士mm大径中径小径基本最大最小基本最大最小R1/8x289.7289.1478.5664.04.93.16.57.45.61.1R1/4X1913.15712.30111.4456.07.34.79.711.08.41.7R3/8X1916.66215.80614.9506.47.75.110.111.48.81.7R1/2X1420.95519.79318.6318.210.06

5、.413.215.011.42.3R3/4X1426.44125.27924.1179.511.37.714.516.312.72.3R1x1133.24931.77030.29110.412.78.116.819.114.52.9R1.1/4x1141.91040.43138.95212.715.010.419.121.416.82.9R1.1/2x1147.80346.32444.84512.715.010.419.121.416.82.9R2x1159.61458.13556.65615.918.213.623.425.721.12.9R2.1/2"X,175.18473.70

6、572.22617.521.014.026.730.223.23.5R3"X1187.88486.40584.92620.624.117.129.833.326.33.5R3.1/2"X100.33098.85197.37222.225.718.731.434.927.93.5美制管螺纹根本尺寸及公差(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7/16x20UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.1131/2

7、x20UNF12.66712.46111.84111.73211.15611.32811.60811.87512.01712.79/16x18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.2883/4X19.0118.7717.9817.8517.1217.3217.6718.0118.1819.0516UNF231438947/8X22.1821.9221.0020.8620.0220.2620.6721.0421.2222.2214UNF43695966451-1/16X26.9426.6525.5725.4224.4

8、224.6825.1425.6125.8026.9812UN4555963181-5/16X33.2933.0031.9231.7730.7731.0331.4931.9632.1533.3312UN4535963481-5/8X41.2240.9439.8839.7038.7138.9839.4439.9040.0941.2712UN955961451-7/8X47.5747.2946.2046.0545.0645.3345.7946.2546.4447.6212UN953961952-1/2X63.4563.1662.0761.9260.9361.2161.6762.1262.3363.5

9、12UN22824162ORFS螺纹9/16x14.2514.0313.3313.2212.5712.7513.0813.3713.5214.2818UNF21513111811/16x17.4217.1816.3916.2715.5315.7416.1016.4316.5817.4616UN786458419313/16x20.5920.3619.5619.4418.7018.9219.2719.6019.7620.6316UN91847396681X14UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.41-3/16x3

10、0.1129.8328.7428.5927.627.8628.3228.7828.9730.1612UN958418931-7/16X36.4636.1735.0934.9433.9434.2134.6735.1335.3336.5112UN77337418131-11/16X42.8142.5241.4441.2940.2940.5641.0241.4841.6842.8612UN77374186350.7550.4649.2248.2348.5148.9749.4249.622X12UN4549.3855416750.8SAE螺纹5/8X15.8315.6114.9214.8014.161

11、4.3514.6814.9515.1115.8718UNF9833111851-1/16X26.9426.6825.7425.6024.7424.9625.3725.7825.9626.9814UN733885317其它美制螺纹9/16X14.2514.0113.2213.1012.3612.5712.9213.2513.4114.2816UN23113961822.1821.8920.8020.6619.6619.9320.3920.8521.0322.227/8X12UN22882961452-1/4X57.1056.8155.7355.5754.5854.8655.3255.7755.9

12、757.1512UN45554166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根本尺寸及公差牙形角60oNPT螺纹代号基面上的直径螺纹长度大径中径小径启效长度管端至基卸长Z1/8X2710.2729.5198.76674.572Z1/4X1813.57212.44311.3149.55.080Z3/8x1817.05515.92614.79710.56.096Z1/2X1421.22319.77218.32113.58.028Z3/4X1426.56825.11723.666148.611Z1x11.533.22831.46129.69417

13、.510.160Z1.1/4x11.541.98540.21838.4511810.688Z1.1/2x11.548.05446.28744.52018.510.688Z2X11.560.09258.32556.5581911.074公制螺纹根本尺寸及公差牙形角60oM螺纹代号根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+0.160+0.236+0.200+

14、0.300-0.026-0.0260000-0.144-0.206M14X11413.35012.917+0.160+0.236+0.200+0.300-0.026-0.02610000-0.144-0.206M12X1.251211.18810.647+0.180+0.265+0.224+0.335-0.028-0.0280000-0.160-0.240M14X1.251413.18812.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M12X1.51211.02610.376+0.190+0.300+0.236+0.375-0

15、.032-0.03210000-0.172-0.268M14X1.51413.02612.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M16X1.51615.02614.376+0.190+0.300+0.236+0.375-0.032-0.0320000-0.172-0.268M18X1.51817.02616.373+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M20X1.52019.02618.376+0.190+0.300+0.236+0.375-0.032-0.

16、0320000-0.172-0.268M22X1.52221.02620.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M24X1.52423.02622.376+0.200+0.300+0.250+0.375-0.032-0.032：0000-0.182-0.268M26X1.52625.02624.376+0.200+0.300+0.250+0.375-0.032-0.03210000-0.182-0.268M27X1.52726.02625.376+0.200+0.300+0.250+0.375-0.032-0.032000

17、0-0.182-0.268M30X1.53029.02628.376+0.招0+0.0100+00>50+0.3750-0.082:0:032M33X1.53332.02631.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268M36X1.53635.02634.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268M39X1.53938.02637.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M42X1.5

18、4241.02640.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268M27X22725.70124.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M30X23028.70127.835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318M33X23331.70130.835+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+0.4750-0.038-0.20