管螺紋規格公稱直徑螺距公稱長度鉆孔深度攻絲深度鉆孔直徑(mm) l1(mm)l2(mm)切削絲錐擠壓絲錐 尺寸牙數nd(mm)p(mm)xdl(mm)minminminmaxminmax 1/16287.7230.9070.5d3.867.945.687.907.998.428.51 1/16287.7230.9070.75d5.799.877.617.907.998.428.51 1/16287.7230.9071d7.7211.809.547.907.998.428.51 1/16287.7230.9071.5d11.5815.6713.407.907.998.428.51 1/16287.7230.9072d15.4519.5317.26

管螺紋與標準螺紋換算標準 尺寸代號每英寸牙數螺距螺紋直徑 （in)np大徑d、d小徑d1、d1 1/16280.9077.7236.561 1/8280.9079.7288.566 1/4191.33713.15711.445 3/8191.33716.66214.95 1/2141.81420.95518.631 5/8141.81422.91120.587 3/4141.81426.44124.117 7/8141.81430.20127.877 1112.30933.24930.291 1-1/8112.30937.89734.939 1-1/4112.30941.9138.952 1-1/2112.30947.80344.845 1-3/

螺紋代號 基本尺寸 (英寸) 大徑(mm)d=d螺距 (mm) 每英寸 牙數 中徑(mm)d2=d2小徑 (mm) 外螺紋d3 牙型高度 r底孔尺寸r底孔尺寸 r1/161/16"7.7230.907287.1426.5610.5810.1256.4 r1/81/8"9.7280.907289.1478.5660.5810.1258.4 r1/41/4"13.1571.3371912.30111.4450.8560.18414.75 r3/83/8"16.6621.3371915.80614.950.8560.18414.75 r1/21/2"20.9551.8141419.79318.6311.1620.24918.25 r3/43/4"26.4

npt英制螺紋標準與技術數據 螺紋規格螺距外徑c1底徑螺紋標號螺牙角度備注 npt1/41.41113.6161860 npt3/81.41117.0551860 npt1/21.81421.2231460 npt5/81.81426.5681460 npt12.20833.227111/260 npt11/42.20841.984111/260 npt11/22.20848.053111/260 npt22.20860.091111/260 npt21/23.17572.699860 npt33.17588.608860 npt31/23.175100.013860 pt：美國標準的60度錐管螺紋 美制一般密封管螺紋的基本尺寸： 尺寸 代號 牙數

名義尺寸大徑螺距 每英寸牙 數中徑小徑牙型高底孔直徑 bammmmtpimm外螺紋h1mm d=dpd2=d2d3 no.14ba10.23110.40.860.720.140.75 no.13ba1.20.25101.61.050.90.150.95 no.12ba1.30.2890.711.130.960.171 no.11ba1.50.3181.931.3151.130.1851.2 no.10ba1.70.3572.571.491.280.211.35 no.9ba1.90.3965.121.6651.430.2351.5 no.8ba2.20.4359.071.941.680.261.8 no.7ba2.50.48

公制螺紋/英制螺紋規格一覽表 發布時間：10-06-21來源：點擊量：5424字段選擇：大中小 2009-10-9 外螺紋大徑（單位mm）－－－－－－－ －－－－－－－－－- 內螺紋小徑（單位mm）－－－－－－－ －－－－－－－－－- 序號規格型號最大最小公差最大最小公差 1m10*19.9749.7940.1809.1578.9170.240 2m12*1.511.96811.7320.23610.67610.3760.300 3m14*1.513.96813.7320.23612.67612.3760.300 4m16*1.515.96815.7320.23614.67614.3760.300 5m18*1.517.96817.7320.23616.67616.3760.30

管徑尺寸對應表 管徑尺寸對應表 公稱尺寸 寸------dn 外徑 長度 公稱尺寸 dn 外徑 長度 i系列ii系列i系列ii系列 1521.31825350355.6377165 2026.92525400406.4426178 1寸2533.73238450457480203 1.2寸3242.43838500508530229 1.5寸4048.34538550559254 2寸5060.35738600610630267 3寸6573.07638650660267 3.5寸8088.98951700711720267 4寸90101.664750762267 100114.310864800813820

mm sizethreaddesignationclassmaxminmaxminmax 0.25m0.25x0.0756g0.2500.2350.2010.1870.160 m0.25x0.0754g6g0.2500.2350.2010.1930.160 0.3m0.3x0.086g0.3000.2840.2480.2340.204 m0.3x0.084g6g0.3000.2840.2480.2390.204 m0.3x0.096g0.3000.2830.2420.2260.192 m0.3x0.094g6g0.3000.2830.2420.2330.192 0.35m0.35x0.096g0.3500.3330.2920.2770.242 m0.35x0.094g6g0.350

101520253240506580100 1/4"1/2"3/4"1"11/4"11/2"2"21/2"3"4" 鋼管a17.221.326.933.742.448.360.376.188.9114.3 外徑b141825323845577689108 125150200250300350400450500600 5"6"8"10"12"14"16"18"20"24" 鋼管a139.7168.3219.1273323.9355.36406.4457508610 外徑b133159219273325377426480530630 700800900100012001400160018002000 28"32"

名義尺 寸大徑螺距 每英寸 牙數中徑小徑牙型高 底孔直 徑 bammmmtpimm外螺紋h1mm d=dpd2=d2d3 no.14ba10.23110.40.860.720.140.75 no.13ba1.20.25101.61.050.90.150.95 no.12ba1.30.2890.711.130.960.171 no.11ba1.50.3181.931.3151.130.1851.2 no.10ba1.70.3572.571.491.280.211.35 no.9ba1.90.3965.121.6651.430.2351.5 no.8ba2.20.4359.071.941.680.261.8 no.7ba2.50.4

英制管螺紋內徑外徑對照表 尺寸代號每寸牙數大徑中徑小徑建議底孔基準距離牙數 1/82710.2429.4898.736φ8.64.1024.36 1/41813.61612.48711.358φ11.15.7864.10 3/81817.05515.92614.797φ14.56.0964.32 1/21421.22319.77218.321φ17.98.1284.48 3/41426.56825.11723.666φ23.28.6114.75 111.533.22831.46129.694φ29.210.1604.60 1-1/411.541.98540.21838.451φ37.910.6684.83

管螺紋每寸牙數大徑小徑底孔基準距離 1/82710.2428.736φ8.64.102 1/41813.61611.358φ11.15.786 3/81817.05514.797φ14.56.096 1/21421.22318.321φ17.98.128 3/41426.56623.667φ23.28.611 111.533.22829.694φ29.210.160 1-1/411.541.98538.451φ37.910.668 1-1/211.548.05444.520φ43.910.668 批準：審核：

小徑大徑 最大最小公差最大最小公差最大最小最大最小公差最大最小公差 m3×0.52.982.8740.1062.6552.580.0752.43932.7752.6750.1002.5992.4590.140 m4×0.73.9783.8380.1403.5233.4330.0903.2243.6633.5450.1183.4223.2420.180 m5×0.84.9764.8260.1504.4564.3610.0954.1154.6054.480.1254.3344.1340.200 m6×15.9745.7940.1805.3245.2120.1124.89165.55.350.1505.1534.9170.236 m8×1.257.972

公制螺紋/英制螺紋規格一覽表 外螺紋大徑（單位mm）－－－－－－－內螺紋小徑（單位mm）－－－－－－－ 序號規格型號最大最小公差最大最小公差 1m10*19.9749.7940.1809.1578.9170.240 2m12*1.511.96811.7320.23610.67610.3760.300 3m14*1.513.96813.7320.23612.67612.3760.300 4m16*1.515.96815.7320.23614.67614.3760.300 5m18*1.517.96817.7320.23616.67616.3760.300 6m20*1.519.96819.7320.23618.67618.3760.300 7m22*1.521.96821.73

no.1-64(1.854)1.551.5821.425no.0-80(1.524)1.251.3051.182 no.2-56(2.184)1.801.8711.695no.1-72(1.854)1.551.6121.474 no.3-48(2.515)2.102.1461.941no.2-64(2.184)1.851.9121.756 no.4-40(2.845)2.302.3852.157no.3-56(2.515)2.102.1972.025 no.5-40(3.175)2.602.6972.487no.4-48(2.845)2.402.4582.271 no.6-32(3.505)2.802.8952.642no.5-44(3.175)2.702.7402.551 no.8-32(4.166)3

英寸毫米.單位毫米.英寸.公斤/米.磅/英尺. 1/8”10.310s1.240.0490.280.19 1/8”10.3std-401.730.0680.370.25 1/8”10.3xs-802.410.0950.480.32 1/4”13.710s1.650.0650.50.34 1/4”13.7std-402.240.0880.640.43 1/4”13.7xs-803.020.1190.810.55 3/8”17.110s1.650.0650.640.43 3/8”17.1std-402.310.0910.850.57 3/8”17.1xs-803.20.1261.110.75 1/2”21.35s1.050.0420.5

最大最小最小1最大最小公差范圍最小最大最小最大公差范圍 2a0.00050.05950.0563?0.05140.04960.00180.04462b0.04650.05140.05190.05420.00230.0600 3a0.00000.06000.0568?0.05190.05060.00130.04513b0.04650.05140.05190.05360.00170.0600 2a0.00060.07240.0686?0.06230.06030.00200.05382b0.05610.06230.06290.06550.00260.0730 3a0.00000.07300.0692?0.06290.06140.00150.05443b0.05610

公稱直徑(大徑)：螺距：中徑：246.103小徑：243.505 公制普通螺紋名義尺寸速查 計算公式為： h(原始三角形高度)=0.866025404p(螺距) 您可以直接通過在下表中選擇得到常用規格的尺寸。 下面可以迅速查詢米制普通螺紋名義的尺寸。范圍按iso261的第一系列直徑，還包括少量第 二系列直徑。先選擇公稱直徑，螺距選擇會變為相應的范圍，而第一個螺距就是粗牙的螺距。 中徑(d2或d2)=d(大徑，公稱直徑)-0.75h 小徑(d1或d1)=d(大徑，公稱直徑)-1.25h 數值圓整到小數點后第三位。 m2506

粗牙普通螺紋基本尺寸 公稱直徑-d(毫米）螺距-t（毫米）(底孔) m10.250.8 m20.401.6 m30.502.5 m40.703.3 m50.804.2 m61.005 m71.006 m81.256.8 m91.257.8 m101.508.5 m111.509.5 m121.7510.3 m142.0012 m162.0014 m182.5015.5 m202.5017.5 m222.5019.5 m243.0021 m273.0024 m303.5026.5 m333.5029.5 m364.0032 m394.0035 m424.5037.5 m454.5040.5 m485.0043 m525.

第一章國標螺紋的一般知識 一.螺紋的分類 1.螺紋分內螺紋和外螺紋兩種； 2.按牙形分可分為：１）三角形螺紋２）梯形螺紋３）矩形螺紋４）鋸齒形螺紋； 3.按線數分單頭螺紋和多頭螺紋； 4.按旋入方向分左旋螺紋和右旋螺紋兩種,右旋不標注，左旋加lh，如m24×1.5lh； 5.按用途不同分有：米制普通螺紋、用螺紋密封的管螺紋、非螺紋密封的管螺紋、60°圓錐管螺 紋、米制錐螺紋等 二.米制普通螺紋 1.米制普通螺紋用大寫m表示，牙型角2α=60°（α表示牙型半角）； 2.米制普通螺紋按螺距分粗牙普通螺紋和細牙普通螺紋兩種； 2.1.粗牙普通螺紋標記一般不標明螺距，如m20表示粗牙螺紋；細牙螺紋標記必須標明螺距， 如m30×1.5表示細牙螺紋、其中螺距為1.5。 2.2.普通螺紋用于機械零件之間的連接和緊固，一

1/16287.7236.5611/16287.723 1/8289.7288.5661/8289.728 1/41913.15711.4451/41913.157 3/81916.66214.953/81916.662 1/21420.95518.6311/21420.955 3/41426.44124.1175/81422.911 11133.24930.2913/41426.441 11/41141.9138.9527/81430.201 11/21147.80344.84511133.249 21159.61456.65611/81137.897 21/21175.18472.22611/41141.91 31187.88484.926

螺紋規格螺距（t）底孔深度螺紋規格螺距（t）底孔深度 m30.502.507.50m81.007.0015.00 m40.703.3010.50m101.009.0015.00 m50.804.2012.00m121.5010.5022.50 m61.005.0015.00m141.5012.5022.50 m81.256.7518.75m161.5014.5022.50 m101.508.5022.50m181.5016.5022.50 m121.7510.2526.25m201.5018.5022.50 m142.0012.0030.00m221.5020.5022.50 m162.0014.0030.00m242.0022.0030.00 m