简明美制、英制、公制螺纹规格对照表

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1、简明美制、英制、公制螺纹规格对照表美制细牙UNF(60°)2A外螺纹大径UNFUN2B内螺纹小径（UN、UNF）序规格型号最大最小公差最小最大公差号17/16"-2011.07910.8740.2069.72810.0330.30521/2"-2012.66712.4610.20611.32811.6080.27939/16"-1814.25214.0310.22112.75113.0810.33043/4"-1619.01218.7730.23917.32317.6780.35657/8"-1422.

2、18421.9230.26220.26920.6760.406161/16-1226.94426.6550.29024.68925.1460.457571/16-1233.29433.0050.29031.03931.4960.457581/8-1241.22940.9400.29038.98939.4460.457791/8-1247.57947.2900.29045.33945.7960.4571102/2-1263.45263.1620.29061.21461.6710.457公制细牙6g外螺纹大

3、径6H内螺纹小径1M10*19.9749.7940.1808.9179.1570.2402M12*1.511.96811.7320.23610.37610.6760.3003M14*1.513.96813.7320.23612.37612.6760.3004M16*1.515.96815.7320.23614.37614.6760.3005M18*1.517.96817.7320.23616.37616.6760.3006M20*1.519.96819.7320.23618.37618.6760.300

4、7M22*1.521.96821.7320.23620.37620.6760.3008M24*1.523.96823.7320.23622.37622.6760.3009M26*1.525.96825.7320.23624.37624.6760.30010M27*1.526.96826.7320.23625.37625.6760.30011M30*1.529.96829.7320.23628.37628.6760.30012M27*226.96226.6820.28024.83525.2100.3751

5、3M30*229.96229.6820.28027.83528.2100.37514M33*232.96232.6820.28030.83531.2100.37515M36*235.96235.6820.28033.83534.2100.37516M42*241.96241.6820.28039.83540.2100.375英制管螺纹1G1/8-289.7289.5140.2148.5668.8480.2822G1/4-1913.15712.9070.25011.44511.8900.4453G3/8-

6、1916.66216.4120.25014.95015.3950.4454G1/2-1420.95520.6710.28418.63119.1720.5415G3/4-1426.44126.1570.28424.11724.6580.5416G1-1133.24932.8890.36030.29130.9310.64017G1/4-1141.91041.5500.36038.95239.5920.64018G1/2-1147.80347.4430.36044.84545.4850.640英制螺纹设计美制

7、螺纹设计米制螺纹设计A型美制螺纹（UNF60º）常用规格英制圆锥管螺纹（BSPT55º）常用规格外螺纹内螺纹基面大径基准距离（圈数）-49/16"-19牙14.2813.081/4”-1913.1576-611/16''-1617.4616.13/8”-1916.6626.4-813/16''-1620.6419.281/2”-1420.9558.2-101''-1425.4023.573/4”-1426.4419.5-121(3/16)''-1230.0028.321”-1133.24910.4-16

8、1(7/16)''-1236.5134.671(1/4)''-1141.9112.7-201(11/16)''-142.8641.02美制圆锥管螺纹（NPT60º）常用规格C型JIC37度美制UNF螺纹常用规格1/8”-2710.244-47/16”-2011.1110.031/4”-1813.604-51/2”-2012.7011.323/8”-1817.044.32-69/16”-1814.2813.081/2”-1421.224.48