螺纹基本尺寸对照表要点

1、英制管螺纹基本尺寸及公差（牙形角 55o） BSPP螺纹代号基本直径内螺纹外螺纹大径中径小径中径公差小径公差A级B级中径公差大径公差中径公差大径公差+0.170+0.2820000G1/8289.7289.1478.5660-0.107-0.214-0.214-0.214G1/4 2913.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250+0.125+0.4450000G3/8 1916.66215.80614.95000-0.125-0.250-0.250-0.250+0.142+0.5410000G1/2 1420.95519.793

2、18.63100-0.142-0.284-0.284-0.284+0.142+0.5410000G5/8 1422.91121.74920.58700-0.142-0.284-0.284-0.284+0.142+0.5410000G3/4” 1426.44125.27924.11700-0.142-0.284-0.284-0.284+0.180+0.6400000G1 1133.24931.77030.29100-0.180-0.360-0.360-0.360+0.180+0.6400000G1.1/4” X141.91040.43138.95200-0.180-0.360-0.360-0.3

3、60+0.180+0.6400000G1.1/2X147.80346.32444.85400-0.180-0.360-0.360-0.360+0.180+0.6400000Z/G21159.61458.13556.65600-0.180-0.360-0.360-0.360+0.217+0.6400000G2.1/2” X1175.18473.70572.22600-0.217-0.434-0.434-0.434+0.217+0.6400000G3 ”X1187.88486.40584.92600-0.217-0.434-0.434-0.434+0.217+0.6400000G3.1/2” X1

4、1100.33098.85197.37200-0.217-0.434-0.434-0.434英制锥管螺纹基本尺寸及公差（牙形角 55o） BSPT螺纹代号基面上的直径基准长度有效螺纹长度圆锥内螺纹基面轴向位移偏差（土mm ）大径中径小径基本最大最小基本最大最小R1/8 2289.7289.1478.5664.04.93.16.57.45.61.1R1/4 X913.15712.30111.4456.07.34.79.711.08.41.7R3/8 X916.66215.80614.9506.47.75.110.111.48.81.7R1/2 X420.95519.79318.6318.210.

5、06.413.215.011.42.3R3/4 濟426.44125.27924.1179.511.37.714.516.312.72.3rTmi33.24931.77030.29110.412.78.116.819.114.52.9R1.1/441.91040.43138.95212.715.010.419.121.416.82.9R1.1/247.80346.32444.84512.715.010.419.121.416.82.9R21159.61458.13556.65615.918.213.623.425.721.12.9R2.1/2 ” X1175.18473.70572.22617

6、.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美制管螺纹基本尺寸及公差(牙形角 60o) UN(F)螺纹代号外螺纹内螺纹公差等级公差等级2A2B大径中径小径小径中径大径最大最小最大最小最小最大最小最大JIC螺纹7/16 爲0UNF11.07910.87410.25410.1479.5689.72810.03310.28710.42411.1131/2 20UNF12.667

7、12.46111.84111.73211.15611.32811.60811.87512.01712.79/16 18UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.2883/4 X6UNF19.01218.77317.98117.85417.1217.32317.67818.01918.18419.057/8 X4UNF22.18421.92321.00620.86920.02520.26920.67621.04621.22422.2251-1/16 12UN26.94426.65525.5725.42524.42524.

8、68925.14625.61325.80126.9881-5/16 X2UN33.29433.00531.9231.77330.77531.03931.49631.96332.15433.3381-5/8 X2UN41.22940.9439.88539.70538.7138.98939.44639.90140.09441.2751-7/8 X2UN47.57947.2946.20546.05345.0645.33945.79646.25146.44947.6252-1/2 X2UN63.45263.16262.07861.9260.93261.21461.67162.12662.33263.5

9、ORFS螺纹9/16 X8UNF14.25214.03113.33513.22112.57312.75113.08113.37113.5214.28811/16 X6UN17.42717.18816.39616.27415.53515.74816.10416.43116.58917.46313/16 X6UN20.59920.36119.56819.44418.70718.92319.27919.60619.76620.6381X4UNF25.35725.09524.17824.03623.19523.44423.82524.22124.40725.41-3/16 X2UN30.11929.8

10、328.74528.59827.627.86428.32128.78828.97930.1631-7/16 X2UN36.46736.17735.09334.94333.94734.21434.67135.13835.33136.5131-11/16 X2UN42.81742.52741.44341.2940.29740.56441.02141.48841.68642.863212UN50.75450.46549.3849.22548.23548.51448.97149.42649.62750.8SAE螺纹5/8 X8UNF15.83915.61814.92314.80314.16114.35

11、114.68114.95815.1115.8751-1/16 *4UN26.94726.68325.74325.60824.7424.96825.37525.78325.96126.987其它美制螺纹9/16 X6UN14.25214.01313.22113.10112.3612.57312.92913.25613.41114.2887/8 X2UN22.18221.89220.80820.66819.66219.93920.39620.85121.03422.2252-1/4 X2UN57.10456.81555.7355.57554.58554.86455.32155.77655.9765

12、7.15注：UNC粗牙螺纹系列，UNF细牙螺纹系列，UNEF超细牙螺纹系列，UN不变螺距系列布锥管螺纹基本尺寸及公差（牙形角60o） NPT螺纹代号基面上的直径螺纹长度大径中径小径有效长度管端至基面长Z1/8 汐10.2729.5198.76674.572Z1/4 X813.57212.44311.3149.55.080Z3/8 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

13、.1/4 11.541.98540.21838.4511810.688Z1.1/2 11.548.05446.28744.52018.510.688Z2 11.560.09258.32556.5581911.074公制螺纹基本尺寸及公差（牙形角60o） M精彩文档螺纹代号基本直径内螺纹外螺纹大径中径小径公差等级公差等级6H7H6g中径公差小径公差中径公差小径公差中径公差大径公差M10X1109.3508.917+0.150+0.236+0.190+0.300-0.026-0.0260000-0.138-0.206M12X11211.35010.917+0.160+0.236+0.200+0.3

14、00-0.026-0.0260000-0.144-0.206M14X11413.35012.917+0.160+0.236+0.200+0.300-0.026-0.0260000-0.144-0.206+0.180+0.265+0.224+0.335-0.028-0.028M12X1.251211.18810.6470000-0.160-0.240M14X1.251413.18812.647+0.180+0.265+0.224+0.335-0.028-0.0280000-0.160-0.240M12X1.51211.02610.376+0.190+0.300+0.236+0.375-0.032

15、-0.0320000-0.172-0.268+0.190+0.300+0.236+0.375-0.032-0.032M14X1.51413.02612.3760000-0.172-0.268+0.190+0.300+0.236+0.375-0.032-0.032M16X1.51615.02614.3760000-0.172-0.268M18X1.51817.02616.373+0.190+0.300+0.236+0.375-0.032-0.0320000-0.172-0.268M20X1.52019.02618.376+0.190+0.300+0.236+0.375-0.032-0.03200

16、00-0.172-0.268+0.190+0.300+0.236+0.375-0.032-0.032M22X1.52221.02620.3760000-0.172-0.268+0.200+0.300+0.250+0.375-0.032-0.032M24X1.52423.02622.3760000-0.182-0.268M26X1.52625.02624.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268M27X1.52726.02625.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182

17、-0.268M30X1.53029.02628.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268+0.200+0.300+0.250+0.375-0.032-0.032M33X1.53332.02631.3760000-0.182-0.268M36X1.53635.02634.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268M39X1.53938.02637.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268M4

18、2X1.54241.02640.376+0.200+0.300+0.250+0.375-0.032-0.0320000-0.182-0.268+0.224+0.375+0.280+0.475-0.038-0.038M27X22725.70124.8350000-0.208-0.318M30X23028.70127.835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318M33X23331.70130.835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318M36X23634.70133.

19、835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318+0.224+0.375+0.280+0.475-0.038-0.038M39X23937.70136.8350000-0.208-0.318M42X24240.70139.835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318M45X24543.70142.835+0.224+0.375+0.280+0.475-0.038-0.0380000-0.208-0.318M52X25250.70149.835+0.236+0.375+

20、0.300+0.475-0.038-0.0380000-0.218-0.318+0.236+0.375+0.300+0.475-0.038-0.038M60X26058.70157.8350000-0.218-0.318M64X26462.70161.835+0.236+0.375+0.300+0.475-0.038-0.0380000-0.218-0.318M72X27270.70169.835+0.236+0.375+0.300+0.475-0.038-0.0380000-0.218-0.31855。圆锥管螺纹基本尺寸对照表最新下载-汇兴达 55。圆锥管螺纹基本尺寸对照表最新下载-汇兴达5

21、5。圆锥管螺纹(BSPT)螺纹 代 号基本尺寸英寸大径mm d=D螺距mmP每英寸牙 数tpi中径mmd2=D2小 径 外 螺 纹 d3牙型高度H1R6.11/17.70.97.15/62307284260.581116R8.11/89.70.9289.150.581/II2807476861R1.11/413.1.31912.40.856/II157373014451R4.33/816.1.31915.90.856/II66237806580R11/220.1.81419.18.1.162II95514793/62312R4.33/426.1.81425.11.162/II441142791

22、4730.R133.2.31131.21.4791249097791R31141.2.340.8.11/4910091143191.479/II542R41147.2.346.4.11/2803091132481.479/II42556.R259.2.31158.61.47926140913556R72275.2.373.2.11/2184091170521.479/II226R3387.8842.3091186.40584.9261.47911113111R2.30.4.0311.551.4794090017213138136R2.35.5.4311.951.4795094017216163

23、162R2.30.6.8311.351.47960980172聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm*1mm 1020mm*200mm合金钢管、外径 22mm-127mm 冷轧无缝钢管、外径 127mm-600mm ，壁厚16mm-100mm，外径精度土 0.5%,壁厚精度土 5%热轧中厚壁无缝钢管、16Mn外径400 1600mm 、壁厚20 60mm 的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有：构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝 钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝

24、钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、 光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。公司以良好的信用、优质的产品、雄厚的实力、低廉的价 钱享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。公司常年销售成都钢铁集团、冶钢集团、包头钢厂、宝钢集团、鞍钢集团、天津大无缝、西宁特钢厂、无锡钢厂、衡阳钢厂等各大钢厂生产的各种无缝钢管及合金管。主营材质：20#、35#、45#、20G、20A、40Mn2、45Mn2、27SiMn、40MnB、20M

25、nVB、20Cr、30Cr、35Cr、40Cr、45Cr、50Cr、38CrSi、12CrMo 、20CrMo、35CrMo、42CrMo、12CrMoV、12Cr1MoV、38CrMoAL、50CrV、20CrMnSi、30CrMnSi、35CrMnSi、20CrMnTi 、30CrMnTi、12CrNi2、12CrNi3、12Cr2Ni4 、40CrNiMoA 、45CrNiMoVA 、20G、20MnG、25MnG、12CrMoG 、15CrMoG 、12Cr2MoG12Cr1MoVG 、12Cr2MoWVTiB 、 12Cr3MoVSiTiB等实行标准：GB/T8162-99 构造管、

26、GB/T8163-99流体管、GB/T3087-99中低压锅炉管、GB/T5310-95高压锅炉管、GB/T6479-2000 化肥专用管、27SiMn 液压支架管、高压合金管、GB/T9948-85石油裂化管GB9948-88 、地质钻探用管 YB235-70、汽车半轴套管 YB/T5035-96 。现我公司有大量合金管、高压管、无缝方管、异型无缝钢管现货，将以优惠的价钱，批零兼营的方式，为您提供快捷优质 的服务，欢迎新老客户前来洽谈、电议。管螺纹的基本尺寸表(2010-10-25 15:57:35)转载杂谈表（1 ）螺纹基本尺寸 G1/2、ZG1/2(单位:mm)尺寸代号每25.4mm类的

27、牙数n螺距p牙型高度h圆弧半 径r 基面上的基本直径基准距离有效螺纹长度大径（基 准直径）d=D中径d2=D2小径d1=D11/16280.9070.581 C.1257.7237.1426.5614.06.51/8280.9070.581 C.1259.7289.1478.5664.06.51/4191.3370.586 C.18413.15712.30111.4456.09.73/8191.3370.586 C.18416.66215.80614.9506.410.11/2141.8141.162 0.24920.95519.79318.6318.213.23/4141.8141.162

28、0.24926.44125.27924.1179.514.51112.3091.479 C.31733.24931.77030.29110.416.81.1/4112.3091.479 0.31741.91040.43138.95212.719.11.1/2112.3091.479 0.31747.80346.32444.84512.719.12112.3091.479 0.31759.61458.13556.65615.923.42.1/2112.3091.479 0.31775.18473.70572.22617.526.73112.3091.479 0.31787.88486.40584

29、.92620.629.83.1/2112.3091.479 0.317100.33098.85197.37222.231.44112.3091.479 0.317113.030111.55110.0725.435.8125112.3091.479 0.317138.430136.95135.4728.640.1126112.3091.479 0.317163.830162.35160.8728.640.112锥管螺纹的基本尺寸表（3-28 ） 1/2PT、1/2NPT表（2 ）螺纹基本尺寸（单位:mm）每基面上的基本直径基准距离25.4m大径（基中径小径m类的准直径）d2=D2d1=D1牙数n

30、尺寸代d=D1/16277.8957.1426.3894.0641/82710.2429.4898.7364.1021/41813.61612.48711.3585.7863/81817.05515.92614.7976.0961/21421.22319.77218.3218.1283/41426.56825.11723.6668.611111.533.22831.46129.69410.1601.1/411.541.98540.21838.45110.6681.1/211.548.05446.28744.52010.668211.560.09258.32556.55811.0742.1/28

31、72.69970.15967.61917.323388.60886.06883.52819.4563.1/28101.31698.77696.23620.85348113.973111.43108.8921.43833螺纹标准的一种，按外形分圆柱、圆锥两种；按牙型角分55 60 两种。螺纹中的1/4、1/2、1/8标记是指螺纹尺寸的直径，单位是英寸。一吋等于8分，1/4吋就是2分，如此类推。国外常用英制螺纹的代号、名称和标准号：B.S.W.标准惠氏粗牙系列，一般用途圆柱螺纹B.S.F.标准惠氏细牙系列，一般用途圆柱螺纹Whits附加的惠氏可选择系列，一般用途圆柱螺纹Whit惠氏牙型的非标准螺纹

32、以上为英国标准BS84牙型角为55 的英制螺纹UN恒定螺距系列的统一螺纹UNC粗牙系列的统一螺纹UNF细牙系列的统一螺纹UNEF超细牙系列的统一螺纹UNS特殊系列的统一螺纹UNR圆弧牙底恒定螺距系列的统一螺纹UNRC圆弧牙底粗牙系列统一螺纹UNRF圆弧牙底细牙系列统一螺纹UNREF圆弧牙底超细牙系列统一螺纹UNRS圆弧牙底特殊系列统一螺纹以上为美国标准ANSIB1.1标准牙型（牙底是平的或随意倒圆的）的内、外螺纹 圆弧牙底的UNR、UNRC、UNRF、UNREF、NRS只用于夕卜螺纹而没有内螺纹NPT一般用途的锥管螺纹NPSC管接头用直管螺纹NPTR导杆连接用锥管螺纹NPSM机械连接用直管螺纹

33、NPSL锁紧螺母用直管螺纹NPSH软管连接用直管螺纹以上为美国标准牙型角为60 的英制管螺纹NPTF干密封标准型锥管螺纹 美国标准ANSIB1.20.3 I型PTF-SAE SHORT干密封短型锥管螺纹 美国标准ANSIB1.20.3 n型NPSF干密封标准型燃油用直管内螺纹美国标准川型精彩文档NPS1干密封标准型一般用直管内螺纹美国标准ANSIB1.20.3 W型ACME一般用途的梯形螺纹 美国标准ANSIB1.5牙型角为29。的英制传动螺纹 尺寸和公差使用与标准系列相同的公式计算的标准系列之外的所有直径与螺距组合。 我国的60 圆锥管螺纹GB/T12716-1991与之等效。 ACME螺纹

34、包括一般用途的和定心的两种配合的梯形螺纹，其中一般用途者与我国标准GB/T5796-1986规定的梯形螺纹的性能相类同。螺距用每英寸的牙数来表示，如：每英寸 11牙，则螺距=25.4/11 = 2.309mm螺纹如何区分英制和公制？默认分类2009-08-24 22:03:14 阅读1281评论0字号：大中小粗略判断的话好像英制的比公职的牙距大(同规格的)NPT , PT, G 都是管螺纹.NPT是National (American) Pipe Thread的縮寫，屬於美国標准的60度锥管螺纹，用於北美地區.国家標准可查阅 GB/T12716-1991PT是Pipe Thread的縮寫，是5

35、5度密封圓锥管螺纹，屬惠氏螺紋家族，多用於欧洲及英联邦国家.常用於水及煤气管行业，锥度規定为1:16 .国家標准可查阅GB/T7306-2000G是55度非螺纹密封管螺纹，屬惠氏螺紋家族.标记为G代表圓柱螺紋.国家標准可查阅GB/T7307-2001另外螺纹中的1/4、1/2、1/8标记是指螺紋尺寸的直徑，單位是英吋.行內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好像就是管螺纹的统称(Guan)，55，60度的划分属于功能性的， 俗称管圆。即螺纹由一圆柱面加工而成RcZG俗称管锥，即螺纹由一圆锥面加工而成，一般的水管接头都是这样的，老国标标注为 精彩文档公制螺纹用螺距

36、来表示，美英制螺纹用每英寸内的螺纹牙数来表示，这是它们最大的区别，公制螺纹是60度等边牙型，英制螺纹是等腰 55度牙型，美制螺纹60度。公制螺纹用公制单位，美英制螺纹用英制单位。管螺纹主要用来进行管道的连接，其内外螺纹的配合紧密，有直管与锥管两种。公称直径是指所连接的管道 直径，显然螺纹大径比公称直径大。1/4，1/2，1/8是英制螺纹的公称直径，单位是英寸。英制螺纹标准规格表大径螺距中径小径寸每英寸牙数牙型高底孔直径牙型代号mmmmmm外螺纹WwtpiH1mmd=Dpd2=D2d31/16BSW1.5870.423601.3151.0500.2701.153/32BSW2.3810.5294

37、82.0411.7030.3381.901/8BSW3.1750.635402.7682.3620.4062.505/32BSW3.9690.793323.4592.9520.5073.203/16BSW4.7621.058244.0843.4070.6773.707/32BSW5.5561.058244.8784.2010.6774.501/4BSW6.3501.270205.5374.7240.8135.105/16BSW7.9381.411187.0346.1310.9046.503/8BSW9.5251.588168.5097.4921.0177.907/16BSW11.1131.81

38、4149.9518.7891.1629.201/2BSW12.7002.1171211.3459.9901.35510.405/8BSW15.8762.3091114.39712.9181.47913.403/4BSW19.0512.5401017.42415.7981.62716.257/8BSW22.2262.822920.41918.6111.80719.251BSW25.4003.175823.36821.3352.03322.001 1/8 BSW28.5763.629726.25323.9292.32424.501 1/4 BSW31.7513.629729.42827.1042.

39、32427.251 3/8 BSW34.9264.233632.21529.5052.71130.251 1/2 BSW38.1004.233635.39132.6802.71133.501 5/8 BSW41.2775.080538.02434.7713.25335.501 3/4 BSW44.4525.080541.19937.9463.25338.501 7/8 BSW47.6275.6454 1/244.01240.3983.61441.252BSW50.8025.6454 1/247.18743.5733.61444.502 1/4 BSW57.1526.350453.08649.0204.06650.002 1/2 BSW63.5026.350459.43655.3704.06656.002 3/4 BSW69.8537.2573 1/265.20560.5584.64761.503BSW76.2037.2573 1/271.55666.9094.64768.003 1/4 BSW82.5537.8163 1/477.54872.5445.00573.753 1/2 BSW88.9037.816