各國(guó)標(biāo)準(zhǔn) 螺紋基本尺寸對(duì)照表

1、.英制管螺紋基本尺寸及公差（牙形角55º）BSPP螺紋代號(hào)基本直徑內(nèi)螺紋外螺紋大徑中徑小徑中徑公差小徑公差A(yù)級(jí)B級(jí)中徑公差大徑公差中徑公差大徑公差G1/8×289.7289.1478.566+0.170+0.28200-0.1070-0.2140-0.2140-0.214G1/4×1913.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250G3/8×1916.66215.80614.950+0.1250+0.44500-0.1250-0.2500-0.2500-0.250G1/2×1420.

2、95519.79318.631+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G5/8×1422.91121.74920.587+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G3/4×1426.44125.27924.117+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G1×1133.24931.77030.291+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G1.1/4×1141.91040.43138.

3、952+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G1.1/2×1147.80346.32444.854+0.1800+0.64000-0.1800-0.3600-0.3600-0.360G2×1159.61458.13556.656+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

4、.2170-0.4340-0.4340-0.434G3.1/2”X11100.33098.85197.372+0.2170+0.64000-0.2170-0.4340-0.4340-0.434英制錐管螺紋基本尺寸及公差（牙形角55º）BSPT螺紋代號(hào)基面上的直徑基準(zhǔn)長(zhǎng)度有效螺紋長(zhǎng)度圓錐內(nèi)螺紋基面軸向位移偏差（±mm）大徑中徑小徑基本最大最小基本最大最小R1/8×289.7289.1478.5664.04.93.16.57.45.61.1R1/4×1913.15712.30111.4456.07.34.79.711.08.41.7R3/8×191

5、6.66215.80614.9506.47.75.110.111.48.81.7R1/2×1420.95519.79318.6318.210.06.413.215.011.42.3R3/4×1426.44125.27924.1179.511.37.714.516.312.72.3R1×1133.24931.77030.29110.412.78.116.819.114.52.9R1.1/4×1141.91040.43138.95212.715.010.419.121.416.82.9R1.1/2×1147.80346.32444.84512.71

6、5.010.419.121.416.82.9R2×1159.61458.13556.65615.918.213.623.425.721.12.9R2.1/2”X1175.18473.70572.22617.521.014.026.730.223.23.5R3”X1187.88486.40584.92620.624.117.129.833.326.33.5R3.1/2”X11100.33098.85197.37222.225.718.731.434.927.93.5美制管螺紋基本尺寸及公差（牙形角60º）UN(F)螺紋代號(hào)外螺紋內(nèi)螺紋公差等級(jí)公差等級(jí)2A2B大徑中徑小徑小徑中

7、徑大徑最大最小最大最小最小最大最小最大JIC螺紋7/16×20UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.1131/2×20UNF12.66712.46111.84111.73211.15611.32811.60811.87512.01712.79/16×18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.2883/4×16UNF19.01218.77317.98117.85417.1217.32317.67818

8、.01918.18419.057/8×14UNF22.18421.92321.00620.86920.02520.26920.67621.04621.22422.2251-1/16×12UN26.94426.65525.5725.42524.42524.68925.14625.61325.80126.9881-5/16×12UN33.29433.00531.9231.77330.77531.03931.49631.96332.15433.3381-5/8×12UN41.22940.9439.88539.70538.7138.98939.44639.901

9、40.09441.2751-7/8×12UN47.57947.2946.20546.05345.0645.33945.79646.25146.44947.6252-1/2×12UN63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5ORFS螺紋9/16×18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.28811/16×16UN17.42717.18816.39616.27415.53515.74816.10416.431

10、16.58917.46313/16×16UN20.59920.36119.56819.44418.70718.92319.27919.60619.76620.6381×14UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.41-3/16×12UN30.11929.8328.74528.59827.627.86428.32128.78828.97930.1631-7/16×12UN36.46736.17735.09334.94333.94734.21434.67135.13835.331

11、36.5131-11/16×12UN42.81742.52741.44341.2940.29740.56441.02141.48841.68642.8632×12UN50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8SAE螺紋5/8×18UNF15.83915.61814.92314.80314.16114.35114.68114.95815.1115.8751-1/16×14UN26.94726.68325.74325.60824.7424.96825.37525.78325.96126.

12、987其它美制螺紋9/16×16UN14.25214.01313.22113.10112.3612.57312.92913.25613.41114.2887/8×12UN22.18221.89220.80820.66819.66219.93920.39620.85121.03422.2252-1/4×12UN57.10456.81555.7355.57554.58554.86455.32155.77655.97657.15注：UNC粗牙螺紋系列，UNF細(xì)牙螺紋系列， UNEF超細(xì)牙螺紋系列， UN不變螺距系列布錐管螺紋基本尺寸及公差(牙形角60º)NPT

13、螺紋代號(hào)基面上的直徑螺紋長(zhǎng)度大徑中徑小徑有效長(zhǎng)度管端至基面長(zhǎng)Z1/8×2710.2729.5198.76674.572Z1/4×1813.57212.44311.3149.55.080Z3/8×1817.05515.92614.79710.56.096Z1/2×1421.22319.77218.32113.58.028Z3/4×1426.56825.11723.666148.611Z1×11.533.22831.46129.69417.510.160Z1.1/4×11.541.98540.21838.4511810.688Z

14、1.1/2×11.548.05446.28744.52018.510.688Z2×11.560.09258.32556.5581911.074公制螺紋基本尺寸及公差(牙形角60º)M螺紋代號(hào)基本直徑螺紋外螺紋大徑中徑小徑公差等級(jí)公差等級(jí)6H7H6g中徑公差小徑公差中徑公差小徑公差中徑公差大徑公差M10X1109.3508.917+0.1500+0.2360+0.1900+0.3000-0.026-0.138-0.026-0.206M12X11211.35010.917+0.1600+0.2360+0.2000+0.3000-0.026-0.144-0.026-0.

15、206M14X11413.35012.917+0.1600+0.2360+0.2000+0.3000-0.026-0.144-0.026-0.206M12X1.251211.18810.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M14X1.251413.18812.647+0.1800+0.2650+0.2240+0.3350-0.028-0.160-0.028-0.240M12X1.51211.02610.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M14X1

16、.51413.02612.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M16X1.51615.02614.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M18X1.51817.02616.373+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M20X1.52019.02618.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M22X1.52221.0

17、2620.376+0.1900+0.3000+0.2360+0.3750-0.032-0.172-0.032-0.268M24X1.52423.02622.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M26X1.52625.02624.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M27X1.52726.02625.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M30X1.53029.02628.376

18、+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M33X1.53332.02631.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M36X1.53635.02634.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M39X1.53938.02637.376+0.2000+0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M42X1.54241.02640.376+0.2000+

19、0.3000+0.2500+0.3750-0.032-0.182-0.032-0.268M27X22725.70124.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M30X23028.70127.835+0.2240+0.3750+0.2800+0.4750-0.038-0.208-0.038-0.318M33X23331.70130.835+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.

20、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+0.4750-0.038-0.208-0.038-0.318M52X25250.70149.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218

21、-0.038-0.318M60X26058.70157.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.318M64X26462.70161.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.318M72X27270.70169.835+0.2360+0.3750+0.3000+0.4750-0.038-0.218-0.038-0.31855°圓錐管螺紋基本尺寸對(duì)照表最新下載-匯興達(dá)55°圓錐管螺紋基本尺寸對(duì)照表最新下載-匯興達(dá)55°圓錐管螺紋(BSPT)

22、螺紋代號(hào)基本尺寸英寸大徑mmd=D螺距mmp每英寸牙數(shù)tpi中徑mmd2=D2小徑外螺紋d3牙型高度H1圓弧尺寸r底孔尺寸mmR 1/161/16"7.7230.907287.1426.5610.5810.1256.4R 1/81/8"9.7280.907289.1478.5660.5810.1258.4R 1/41/4"13.1571.3371912.30111.4450.8560.18411.2R 3/83/8"16.6621.3371915.80614.9500.8560.18414.75R 1/21/2"20.9551.8141419.

23、79318.6311.1620.24918.25R 3/43/4"26.4411.8141425.27924.1171.1620.24923.75R 11"33.2492.3091131.7730.2911.4790.31730R 1 1/41 1/4"41.9102.3091140.43138.9521.4790.31738.5R 1 1/21 1/2"47.8032.3091146.32444.8451.4790.31744.5R 22"59.6142.3091158.13556.6561.4790.31756R 2 1/22 1/2&qu

24、ot;75.1842.3091173.70572.2261.4790.31771R 33"87.8842.3091186.40584.9261.4790.31785.5R 44"113.0302.30911111.551110.0721.4790.317110.5R 55"138.4302.30911136.951135.4721.4790.317136R 66"163.8302.30911162.351160.8721.4790.317161.5聊城市鑫茂祥管業(yè)有限公司專(zhuān)業(yè)經(jīng)營(yíng)鋼管規(guī)格：5mm*1mm1020mm*200mm合金鋼管、外徑22mm-12

25、7mm冷軋無(wú)縫鋼管、外徑127mm-600mm，壁厚16mm-100mm，外徑精度±0.5%,壁厚精度±5%熱軋中厚壁無(wú)縫鋼管、16Mn外徑4001600mm、壁厚2060mm的大口徑厚壁卷管，可定尺到16米及各種規(guī)格的無(wú)縫方管、異型無(wú)縫鋼管等.常備鋼管種類(lèi)有:構(gòu)造用無(wú)縫鋼管、流體用無(wú)縫鋼管、液壓無(wú)縫鋼管、電力用無(wú)縫鋼管、石油輸送用無(wú)縫鋼管、化肥設(shè)備用無(wú)縫鋼管、煤礦用無(wú)縫鋼管、不銹鋼無(wú)縫鋼管、化工用無(wú)縫鋼管、紡織機(jī)械用無(wú)縫鋼管、汽車(chē)；水利用無(wú)縫鋼管，精密無(wú)縫鋼管、光亮無(wú)縫鋼管、軍工醫(yī)療用無(wú)縫鋼管、管道用無(wú)縫鋼管、支柱用無(wú)縫鋼管、合金無(wú)縫管、高壓無(wú)縫管、大口徑直縫焊管等。適用

26、于工程、煤礦 、紡織、電力、鍋爐、機(jī)械、軍工等各個(gè)領(lǐng)域。公司以良好的信用、優(yōu)質(zhì)的產(chǎn)品、雄厚的實(shí)力、低廉的價(jià)錢(qián)享譽(yù)全國(guó)30多個(gè)省、市、自治區(qū)、直轄市及國(guó)外，產(chǎn)品深得用戶(hù)依賴(lài)。    管螺紋的基本尺寸表(2010-10-25 15:57:35) 標(biāo)簽：雜談表（1）螺紋基本尺寸     G1/2 、ZG1/2                 &

27、#160;   (單位:mm)尺寸代號(hào)每25.4mm類(lèi)的牙數(shù)n螺距p牙型高度h圓弧半徑r基面上的基本直徑基準(zhǔn)距離有效螺紋長(zhǎng)度大徑（基準(zhǔn)直徑）d=D中徑d2=D2小徑d1=D11/16280.9070.5810.1257.7237.1426.5614.06.51/8280.9070.5810.1259.7289.1478.5664.06.51/4191.3370.5860.18413.15712.30111.4456.09.73/8191.3370.5860.18416.66215.80614.9506.410.11/2141.8141.1620.24920.95519.79

28、318.6318.213.23/4141.8141.1620.24926.44125.27924.1179.514.51112.3091.4790.31733.24931.77030.29110.416.81.1/4112.3091.4790.31741.91040.43138.95212.719.11.1/2112.3091.4790.31747.80346.32444.84512.719.12112.3091.4790.31759.61458.13556.65615.923.42.1/2112.3091.4790.31775.18473.70572.22617.526.73112.3091

29、.4790.31787.88486.40584.92620.629.83.1/2112.3091.4790.317100.33098.85197.37222.231.44112.3091.4790.317113.030111.551110.07225.435.85112.3091.4790.317138.430136.951135.47228.640.16112.3091.4790.317163.830162.351160.87228.640.1錐管螺紋的基本尺寸表（3-28）1/2PT 、1/2NPT 表（2）螺紋基本尺寸    &

30、#160;  (單位:mm)尺寸代號(hào)每25.4mm類(lèi)的牙數(shù)n基面上的基本直徑基準(zhǔn)距離大徑（基準(zhǔn)直徑）d=D中徑d2=D2小徑d1=D11/16277.8957.1426.3894.0641/82710.2429.4898.7364.1021/41813.61612.48711.3585.7863/81817.05515.92614.7976.0961/21421.22319.77218.3218.1283/41426.56825.11723.6668.611111.533.22831.46129.69410.1601.1/411.541.98540.21838.45110.6681.

31、1/211.548.05446.28744.52010.668211.560.09258.32556.55811.0742.1/2872.69970.15967.61917.3233888.60886.06883.52819.4563.1/28101.31698.77696.23620.85348113.973111.433108.89321.438螺紋標(biāo)準(zhǔn)的一種，按外形分圓柱、圓錐兩種；按牙型角分55°、60°兩種。螺紋中的1/4、1/2、1/8 標(biāo)記是指螺紋尺寸的直徑，單位是英寸。一吋等于8分，1/4 吋就是2分，如此類(lèi)推。國(guó)外常用英制螺紋的代號(hào)、名

32、稱(chēng)和標(biāo)準(zhǔn)號(hào) ：B.S.W. 標(biāo)準(zhǔn)惠氏粗牙系列，一般用途圓柱螺紋 B.S.F. 標(biāo)準(zhǔn)惠氏細(xì)牙系列，一般用途圓柱螺紋 Whit.S 附加的惠氏可選擇系列，一般用途圓柱螺紋 Whit 惠氏牙型的非標(biāo)準(zhǔn)螺紋 以上為英國(guó)標(biāo)準(zhǔn)BS84 牙型角為55°的英制螺紋 UN 恒定螺距系列的統(tǒng)一螺紋 UNC 粗牙系列的統(tǒng)一螺紋 UNF 細(xì)牙系列的統(tǒng)一螺紋 UNEF 超細(xì)牙系列的統(tǒng)一螺紋 UNS 特殊系列的統(tǒng)一

33、螺紋 UNR 圓弧牙底恒定螺距系列的統(tǒng)一螺紋 UNRC 圓弧牙底粗牙系列統(tǒng)一螺紋 UNRF 圓弧牙底細(xì)牙系列統(tǒng)一螺紋 UNREF 圓弧牙底超細(xì)牙系列統(tǒng)一螺紋 UNRS 圓弧牙底特殊系列統(tǒng)一螺紋 以上為美國(guó)標(biāo)準(zhǔn)ANSIB1.1標(biāo)準(zhǔn)牙型(牙底是平的或隨意倒圓的)的內(nèi)、外螺紋 圓弧牙底的UNR、UNRC、UNRF、UNREF、NRS只用于外螺紋而沒(méi)有內(nèi)螺紋 NPT 一般用途的錐管螺紋 NPSC 管接頭用直管螺紋 NPTR 

34、導(dǎo)桿連接用錐管螺紋 NPSM 機(jī)械連接用直管螺紋 NPSL 鎖緊螺母用直管螺紋 NPSH 軟管連接用直管螺紋 以上為美國(guó)標(biāo)準(zhǔn)ANSIB1.20.1 牙型角為60°的英制管螺紋NPTF 干密封標(biāo)準(zhǔn)型錐管螺紋 美國(guó)標(biāo)準(zhǔn)ANSIB1.20.3 型 PTF-SAE SHORT 干密封短型錐管螺紋 美國(guó)標(biāo)準(zhǔn)ANSIB1.20.3 型 NPSF 干密封標(biāo)準(zhǔn)型燃油用直管內(nèi)螺紋 美國(guó)標(biāo)準(zhǔn)ANSIB1.20.3&#

35、160;型 NPS1 干密封標(biāo)準(zhǔn)型一般用直管內(nèi)螺紋 美國(guó)標(biāo)準(zhǔn)ANSIB1.20.3 型 ACME 一般用途的梯形螺紋 美國(guó)標(biāo)準(zhǔn)ANSIB1.5 牙型角為29°的英制傳動(dòng)螺紋 尺寸和公差使用與標(biāo)準(zhǔn)系列相同的公式計(jì)算的標(biāo)準(zhǔn)系列之外的所有直徑與螺距組合。 我國(guó)的60°圓錐管螺紋GB/T12716-1991與之等效。 ACME螺紋包括一般用途的和定心的兩種配合的梯形螺紋，其中一般用途者與我國(guó)標(biāo)準(zhǔn)GB/T5796-1986規(guī)定的梯形螺紋的性能相類(lèi)同。螺距用每英寸的牙數(shù)來(lái)表示，

36、如：每英寸11牙，則螺距25.4/112.309mm  螺紋如何區(qū)分英制和公制.默認(rèn)分類(lèi) 2009-08-24 22:03:14 閱讀1281 評(píng)論0 字號(hào)：大中小 粗略判斷的話(huà)好像英制的比公職的牙距大（同規(guī)格的） NPT，PT，G都是管螺紋NPT 是 National (American) Pipe Thread 的縮寫(xiě)，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/T12716-1991PT

37、 是 Pipe Thread 的縮寫(xiě)，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/T7306-2000G 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(lái)稱(chēng)呼螺紋尺寸，一吋等於分，1/4 吋就是

38、分，如此類(lèi)推G 好像就是管螺紋的統(tǒng)稱(chēng)(Guan)，55，60度的劃分屬于功能性的，俗稱(chēng)管圓。即螺紋由一圓柱面加工而成。ZG俗稱(chēng)管錐，即螺紋由一圓錐面加工而成，一般的水管接頭都是這樣的，老國(guó)標(biāo)標(biāo)注為Rc公制螺紋用螺距來(lái)表示，美英制螺紋用每英寸內(nèi)的螺紋牙數(shù)來(lái)表示，這是它們最大的區(qū)別，公制螺紋是60度等邊牙型，英制螺紋是等腰55度牙型，美制螺紋60度。公制螺紋用公制單位， 美英制螺紋用英制單位。管螺紋主要用來(lái)進(jìn)行管道的連接，其內(nèi)外螺紋的配合緊密，有直管與錐管兩種。公稱(chēng)直徑是指所連接的管道直徑，顯然螺紋大徑比公稱(chēng)直徑大。1/4，1/2，1/8是英制螺紋的公稱(chēng)直徑，單位是英寸。英制螺

39、紋標(biāo)準(zhǔn)規(guī)格表寸Ww牙型代號(hào)大徑mmd=D螺距mmp每英寸牙數(shù)tpi中徑mmd2=D2小徑外螺紋d3牙型高H1底孔直徑mm 1/16"BSW1.5870.423601.3151.0500.2701.15 3/32"BSW2.3810.529482.0411.7030.3381.90 1/8"BSW3.1750.635402.7682.3620.4062.50 5/32"BSW3.9690.793323.4592.9520.5073.20 3/16"BSW4.7621.058244.0843.407

40、0.6773.70 7/32"BSW5.5561.058244.8784.2010.6774.50 1/4"BSW6.3501.270205.5374.7240.8135.10 5/16"BSW7.9381.411187.0346.1310.9046.50 3/8"BSW9.5251.588168.5097.4921.0177.90 7/16"BSW11.1131.814149.9518.7891.1629.20 1/2"BSW12.7002.1171211.3459.990

41、1.35510.40 5/8"BSW15.8762.3091114.39712.9181.47913.40 3/4"BSW19.0512.5401017.42415.7981.62716.25 7/8"BSW22.2262.822920.41918.6111.80719.25 1"BSW25.4003.175823.36821.3352.03322.00 1 1/8"BSW28.5763.629726.25323.9292.32424.50 1 1/4"B

42、SW31.7513.629729.42827.1042.32427.25 1 3/8"BSW34.9264.233632.21529.5052.71130.25 1 1/2"BSW38.1004.233635.39132.6802.71133.50 1 5/8"BSW41.2775.080538.02434.7713.25335.50 1 3/4"BSW44.4525.080541.19937.9463.25338.50 1 7/8"BSW47.

43、6275.6454 1/244.01240.3983.61441.25 2"BSW50.8025.6454 1/247.18743.5733.61444.50 2 1/4"BSW57.1526.350453.08649.0204.06650.00 2 1/2"BSW63.5026.350459.43655.3704.06656.00 2 3/4"BSW69.8537.2573 1/265.20560.5584.64761.50 3"BS

44、W76.2037.2573 1/271.55666.9094.64768.00 3 1/4"BSW82.5537.8163 1/477.54872.5445.00573.75 3 1/2"BSW88.9037.8163 1/483.89978.8945.00580.00 3 3/4"BSW95.2548.467389.83284.4105.42285.50 4"BSW101.6048.467396.18290.7605.42292.00 4

45、60;1/4"BSW107.9548.8352 7/8102.29796.6395.65798.00 4 1/2"BSW114.3048.8352 7/8108.647102.9905.657104.20 4 3/4"BSW120.6659.2372 3/4114.740108.6255.915110.00 5"BSW127.0059.2372 3/4121.090115.1765.915116.50 5 1/4"BSW133.3559

46、.6772 5/8127.159120.9636.196122.50 5 1/2"BSW139.7059.6772 5/8133.509127.3136.196128.50 5 3/4"BSW146.05510.1602 1/2139.549133.0436.506134.50 6"BSW152.40610.1602 1/2145.900139.3946.506141.00        

47、0;   英制普通螺紋 - 細(xì)牙 - BSF英制普通螺紋 (惠氏螺紋) - 細(xì)牙 (BSW)名義尺寸BSF牙型代號(hào)大徑mmd=D螺距mmp每英寸牙數(shù)tpi中徑mmd2=D2小徑外螺紋d3牙型高H1底孔直徑mm 3/16BSF4.7630.794324.2553.7470.5084.007/32BSF5.5560.907284.9754.3940.5814.601/4BSF6.3500.977265.7255.1000.6255.309/32BSF7.1420.977266.5185.8930.6256.105/16BSF7.9381.156227.1996.4590.7396.803/8BS