公制英制螺紋對(duì)照表

公制/美制/英制螺紋對(duì)照表 a型美制螺紋（unf）常用規(guī)格 外螺紋內(nèi)螺紋 -49/16"-19牙14.2813.08 -611/16''-1617.4616.1 -813/16''-1620.6419.28 -101''-1425.4023.57 -121(3/16)''-1230.0028.32 -161(7/16)''-1236.5134.67 -201(11/16)''-1242.8641.02 c型jic37度美制unf螺紋常用規(guī)格 =============c型jic37度美制unf螺紋常用規(guī)格================ -47/16”-2011.1110.03 -51/2”-2012.7011.32 -69/16”-1814.2813.08 -83/4”

基本尺寸大徑螺距 每英寸牙 數(shù)中徑小徑牙型高度圓弧尺寸底孔尺寸 外徑 英寸mmmmtpimm外螺紋h1rmmmm d=dpd2=d2d3公稱內(nèi)徑英寸 r1/161/16＂7.7230.907287.1426.5610.5810.1256.4dn151/24分21.3 r1/81/8＂9.7280.907289.1478.5660.5810.1258.4dn203/426.9 r1/41/4＂13.1571.3371912.30111.4450.8560.18411.2dn25133.7 r3/83/8＂16.6621.3371915.80614.950.8560.18414.75dn321.2542.4 r1/21/2＂20.955

名義尺寸大徑螺距 每英寸 牙數(shù)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

英制螺紋對(duì)應(yīng)公制（mm)底孔直徑公制螺紋底孔直徑 1/8"3.182.70m1.00.80 5/32"3.973.30m2.01.80 3/16"4.763.80m3.02.50 1/4"6.355.10m4.03.30 5/16"7.946.60m5.04.20 3/8"9.538.00m6.05.00 7/16"11.119.40m7.06.00 1/2"12.7010.70m8.06.80 5/8"15.8813.70m9.07.80 3/4"19.0516.70m10.08.50 7/8"22.2319.50m12.010.30 1"25.4022.40m14.012.00 m16.014.00 m18.015.50 m20.017.50 m22.019.50 m24.

２ｂ max 3b max ２ｂ、３ｂ max no.1640.3971.5821.5821.425 no.2560.4541.8721.8721.694 no.3480.5292.1462.1461.941 no.4400.6352.3852.3852.156 no.5400.6352.6972.6972.487 no.6320.7942.8962.8962.642 no.8320.7943.5313.5283.302 no.10241.0583.9623.953.683 no.12241.0584.5974.594.343 1/4201.275.2685.254.976 5/16181.4116.7846.686.411 3/8161.5888.164

名義尺寸大徑螺距 每英寸牙 數(shù)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

英制螺紋標(biāo)準(zhǔn)對(duì)照表

尺寸代號(hào) 每英寸牙 數(shù) 螺距 （in)g螺紋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 1-3/4112.30953.74650.788 2

規(guī)格直徑 unc牙數(shù)/寸通 用命名標(biāo)準(zhǔn) unf牙數(shù)/寸 統(tǒng)一標(biāo)準(zhǔn) bsw牙數(shù)/寸bsf牙數(shù)/寸 0#1.52/80// 1#1.856472// 2#2.185664// 3#2.514856// 4#2.844048// 5#,(1/8”)3.18404440/ 6#3.513240// 8#4.173236// 10#(3/16”)4.8324322432 12#(7/32”)5.492428/28 1/4”6.3520282026 5/16”7.9418241822 3/8”9.5316201620 7/16”11.1114201418 1/2”12.7013181216 9/16”14.291218121

mmmmmmmmmm螺距mmmm螺距mmmm螺距mmmm螺距mm 30.530.35 no.540no.5441/8"40 3.1750.6353.1750.57733.1750.635 40.740.5 no.832no.836 4.16560.79384.16560.7056 3/16"243/16"32 4.76251.05834.76250.7938 no.1024no.1032 4.82601.05834.82600.7938 50.850.5 6160.5 1/4"201/4"281/4"201/4"26 6.351.276.350.90716.351.276.350.9769 5/16"185/16"245/16"18

螺紋簡(jiǎn)介： 1.1螺紋的起源 一般認(rèn)為，阿基米德（公元前287-212年）是首先將螺紋用于工業(yè)目的，即將低處的水移到高處的一種工具。 1659年法國(guó)人貝茲遜發(fā)明螺紋切割機(jī)；其后，經(jīng)過英國(guó)的威阿特、亨利?莫斯列，到其子弟約瑟夫?惠氏于1841年才 統(tǒng)一原本混亂的螺紋，促進(jìn)螺紋制品的全球普及；因此，惠氏螺紋也隨英國(guó)工業(yè)的發(fā)達(dá)而廣泛傳播世界。 美制螺紋依據(jù)塞勒氏螺紋（seller'sthread）而問世于1924年；二次世界大戰(zhàn)中，美國(guó)、英國(guó)、加拿大三國(guó)協(xié) 定發(fā)展成統(tǒng)一制螺紋unifiedthread。隨著國(guó)際交流的頻繁，1947年成立的iso國(guó)際標(biāo)準(zhǔn)化組織（internationalstandard organization)成為推動(dòng)國(guó)際標(biāo)準(zhǔn)化的重要力量。 1.2螺紋概述 按用途分類，可分為緊固螺紋、密封螺紋、傳動(dòng)螺紋、管螺紋、專用螺紋。 1.3螺紋的分

公稱直徑螺距公稱直徑螺距公稱直徑螺距 10.25121.75364 20.4142394 2.50.45162424.5 30.5182.5454.5 3.50.5202.5485 40.7222.5525 50.8243565.5 61273605.5 81.25303.5646 101.5333.5686 公稱直徑牙數(shù)大經(jīng)小徑公稱直徑牙數(shù)大經(jīng)小徑 3/16244.633.77/8921.9619.3 1/4206.25.11825.1122 5/16187.786.511/8728.2524.7 3/8169.367.91 1 /4731.4227.9 7/161410.939.31 1 /263

公制螺紋/英制螺紋規(guī)格一覽表 發(fā)布時(shí)間：10-06-21來源：點(diǎn)擊量：5424字段選擇：大中小 2009-10-9 外螺紋大徑（單位mm）－－－－－－－ －－－－－－－－－- 內(nèi)螺紋小徑（單位mm）－－－－－－－ －－－－－－－－－- 序號(hào)規(guī)格型號(hào)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

名義尺 寸大徑螺距 每英寸 牙數(shù)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

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(jì)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(guī)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(huì)變?yōu)橄鄳?yīng)的范圍，而第一個(gè)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(shù)值圓整到小數(shù)點(diǎn)后第三位。 m2506

英制管螺紋內(nèi)徑外徑對(duì)照表 尺寸代號(hào)每寸牙數(shù)大徑中徑小徑建議底孔基準(zhǔn)距離牙數(shù) 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

公制、美制和英制螺紋標(biāo)準(zhǔn) npt，pt，g都是管螺紋． npt是national(american)pipethread的縮寫，屬於美國(guó)標(biāo)準(zhǔn)的60度錐管螺紋，用於北 美地區(qū)．國(guó)家標(biāo)準(zhǔn)可查閱gb/t12716-1991 pt是pipethread的縮寫，是55度密封圓錐管螺紋，屬惠氏螺紋家族，多用於歐洲及英聯(lián)邦國(guó) 家．常用於水及煤氣管行業(yè)，錐度規(guī)定為1:16．國(guó)家標(biāo)準(zhǔn)可查閱gb/t7306-2000 g是55度非螺紋密封管螺紋，屬惠氏螺紋家族．標(biāo)記為g代表圓柱螺紋．國(guó)家標(biāo)準(zhǔn)可查閱 gb/t7307-2001 另外螺紋中的1/4、1/2、1/8標(biāo)記是指螺紋尺寸的直徑，單位是英吋． 行內(nèi)人通常用分來稱呼螺紋尺寸，一吋等於８分，1/4吋就是２分，如此類推． g好像就是管螺紋的統(tǒng)稱(guan)，55，60度的劃分屬于功能性的

[分享]公制、美制和英制螺紋標(biāo)準(zhǔn)區(qū)別 npt，pt，g都是管螺紋． npt是national(american)pipethread的縮寫，屬於美國(guó)標(biāo)準(zhǔn)的60度錐管螺紋，用於北美地區(qū)．國(guó) 家標(biāo)準(zhǔn)可查閱gb/t12716-1991 pt是pipethread的縮寫，是55度密封圓錐管螺紋，屬惠氏螺紋家族，多用於歐洲及英聯(lián)邦國(guó)家．常 用於水及煤氣管行業(yè)，錐度規(guī)定為1:16．國(guó)家標(biāo)準(zhǔn)可查閱gb/t7306-2000 g是55度非螺紋密封管螺紋，屬惠氏螺紋家族．標(biāo)記為g代表圓柱螺紋．國(guó)家標(biāo)準(zhǔn)可查閱gb/t7307- 2001 另外螺紋中的1/4、1/2、1/8標(biāo)記是指螺紋尺寸的直徑，單位是英吋． 行內(nèi)人通常用分來稱呼螺紋尺寸，一吋等於８分，1/4吋就是２分，如此類推． g好像就是管螺紋的統(tǒng)稱(guan)，55，60度的

mm 鉆后 不鉸孔 鉆后 鉸孔 鏜后 鉸孔 鏜后 不鉸孔 z1/8"8.78.4 z1/4"11.310.7 z3/8"14.814 z1/2"18.317.5 z3/4"23.722.8 z1"29.628.628.6+0.1429.6+0.14 z11/4"38.537.337.3 +0.17 38.5 +0.17 z11/2"44.543.343.3+0.1744.5+0.17 z2"575555+0.257+0.2 mm d鉆孔直徑d鉆孔直徑鏜孔直徑 g1/8"8.8g1"30.530.5+0.17 g1/4"11.7g11/4"39.2+0.17 g3/8"

管螺紋每寸牙數(shù)大徑小徑底孔基準(zhǔn)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(zhǔn)：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(guī)格一覽表 外螺紋大徑（單位mm）－－－－－－－內(nèi)螺紋小徑（單位mm）－－－－－－－ 序號(hào)規(guī)格型號(hào)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