螺纹规格-美制、英制、公制美制细牙UNF2A外螺纹大径UNFUN2B内螺纹小径（UN、UNF）序号规格型号最大最小公差最小最大公差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"-1422.18421.9230.26220.26920.6760.406611/16-1226.94426.6550.29024.68925.1460.457715/16-1233.29433.0050.29031.03931.4960.457815/8-1241.22940.9400.29038.98939.4460.457917/8-1247.57947.2900.29045.33945.7960.4571012 /2-1263.45263.1620.29061.21461.6710.457公制细牙6g外螺纹大径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*1.519.96819.7320.23618.37618.6760.3007M22*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*226.96226.6820.28024.83525.2100.37513M30*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1G1/8-289.7289.5140.2148.5668.8480.2822G1/4-1913.15712.9070.25011.44511.8900.4453G3/8-1916.66216.4120.25014.95015.3950.4454G1/2-1420.95520.6710.28418.63119.1720.5415G3/4-1426.44126.1570.28424.11724.6580.5416G1-1133.24932.8890.36030.29130.9310.64071G1 /4-1141.91041.5500.36038.95239.5920.6408G11/2-1147.80347.4430.36044.84545.4850.640公制/美制/英制螺纹对照表给大家分享一下A型美制螺纹（UNF ）常用规格英制圆锥管螺纹（基面大径BSPT ）常用规格基准距离外螺纹 内勿螺纹■-49/16"-19 牙14.2813.08 --611/16''-1617.4616.1-813/16''-1620.6419.28 --101''-14 25.40 23.57，-121(3/16)"-1230.0028.32-161(7/16)"-1236.5134.67--201(11/16)''-12 42.86 41.02C型JIC37度美制1 UNF螺纹常用规格-47/16 ”011.1110.03-51/2 -20 12.70 11.32-69/16 -1814.2813.08 --83/4 -16 19.00 17.68-107/8 ”422.2220.68--121(1/16)"-1226.98i 25.15-161(5/16)"-1233.33• 31.5…-201(5/8)"-1241.2839.44-241(7/8)"-1247.6245.8-322(1/2)"-1263.561.67"英制圆柱管螺纹（BSPP)常用规格一-41/4 -19 13.15711.55-63/8 -19 16.66214.95 …-81/2 -14 20.95518.63-123/4 ”426.44124.11 q-161”-11 33.249 30.29--201(1/4)''-1141.9138.951/4-1913.1576@3/8-1916.6626.41/2-1420.9558.23/4-1426.4419.51”-11 33.249 1041(1/4)"-11 41.91 12.7g美制圆锥管螺纹(NPT)1/8 -27 10.24 41/4 -18 13.60 4-3/8 -18 17.04 4.324.484.751/2 -14 21.223/4 -14 26.574.6 ■4.831 ”-11(1/2) ” 33.221(1/4) -11.5 41.96。