名义尺寸BANo. 14No. 13No. 12No. 11No. 10No. 9No. 8No. 7No. 6No. 5No. 4No. 3No. 2No. 1No. 0牙型代号BABABABABABABABABABABABABABABA英制普通螺纹 (惠氏螺纹) -- 小螺纹系列 (BA)每英寸牙大径螺距数中径小径mmmmtpimm外螺纹d=Dpd2=D2d310.23110.40.860.721.20.25101.61.050.91.30.20.711.130.961.50.3181.931.3151.131.70.3572.571.491.281.90.3965.121.6651.432.20.4359.071.941.682.50.4852.922.211.922.80.5347.922.482.163.20.5943.052.8452.493.60.6638.483.2052.814.10.7334.793.663.224.70.8131.354.2153.735.30.928.224.7.226125.45.44.8牙型高H10.140.150.170.1850.210.2350.260.290.320.3550.3950.440.4850.540.6底孔直径mm0.750.9511.21.351.51.822.32.62.953.43.94.4555°圆锥管螺纹型式和尺寸（2006-03-13 14:38:47 ）基本尺寸英 寸螺纹代号R 1/16R 1/8R 1/4R 3/8R 1/2R 3/4R 1R 1 1/4R 1 1/2R 2R 2 1/2R 3R 4R 5R 61/16＂1/8＂1/4＂3/8＂1/2＂3/4＂1＂1 1/4＂1 1/2＂2＂2 1/2＂3＂4＂5＂6＂大径mmd=D7.7239.72813.15716.66220.95526.44133.24941.9147.80359.61475.18487.884113.03138.43163.83螺距mmp0.9070.9071.3371.3371.8141.8142.3092.3092.3092.3092.3092.3092.3092.3092.309每英寸牙数tpi282819191414111111111111111111中径mmd2=D27.1429.14712.30115.80619.79325.27931.7740.43146.32458.13573.70586.405111.551136.951162.351小径外螺纹d36.5618.56611.44514.9518.63124.11730.29138.95244.84556.65672.22684.926110.072135.472160.872牙型高度圆弧尺寸底孔尺寸H1rmm0.5810.5810.8560.8561.1621.1621.4791.4791.4791.4791.4791.4791.4791.4791.4790.1250.1250.1840.1840.2490.2490.3170.3170.3170.3170.3170.3170.3170.3170.3176.48.411.214.7518.2523.753038.544.5567185.5110.5136161.5制惠氏螺纹的型式尺寸英制普通螺纹 (惠氏螺纹) -- 粗牙 (BSW)名义尺寸大径螺距每英寸牙数中径小径牙型高底孔直径Wwmmmmtpimm外螺纹H1mm牙型代号d=Dpd2=D2d31/16＂BSW1.5870.423601.3151.050.271.153/32＂BSW2.3810.529482.0411.7030.3381.91/8＂BSW3.1750.635402.7682.3620.4062.55/32＂BSW3.9690.793323.4592.9520.5073.23/16＂BSW4.7621.058244.0843.4070.6773.77/32＂BSW5.5561.058244.8784.2010.6774.51/4＂BSW6.351.27205.5374.7240.8135.15/16＂BSW7.9381.411187.0346.1310.9046.53/8＂BSW9.5251.588168.5097.4921.0177.97/16＂BSW11.1131.814149.9518.71.1629.21/2＂BSW12.72.1171211.3459.991.35510.45/8＂BSW15.8762.3091114.39712.9181.47913.43/4＂BSW19.0512.541017.42415.7981.62716.257/8＂BSW22.2262.822920.41918.6111.80719.251＂BSW25.43.175823.36821.3352.033221 1/8＂BSW28.5763.629726.25323.9292.32424.51 1/4＂BSW31.7513.629729.42827.1042.32427.251 3/8＂BSW34.92.233632.21529.5052.71130.251 1/2＂BSW38.14.233635.39132.682.71133.51 5/8＂BSW41.2775.08538.02434.7713.25335.51 3/4＂BSW44.4525.08541.19937.9463.25338.51 7/8＂BSW47.6275.54 1/244.01240.3983.61441.252＂BSW50.8025.54 1/247.18743.5733.61444.52 1/4＂BSW57.1526.35453.0.024.066502 1/2＂BSW63.5026.35459.43655.374.066562 3/4＂BSW69.8537.2573 1/265.20560.5584.761.53＂BSW76.2037.2573 1/271.55666.9094.7683 1/4＂BSW82.5537.8163 1/477.54872.5445.00573.753 1/2＂BSW88.9037.8163 1/483.978.45.005803 3/4＂BSW95.2548.4673.83284.415.42285.54＂BSW101.6048.467396.18290.765.422924 1/4＂BSW107.9548.8352 7/8102.29796.6395.657984 1/2＂BSW114.3048.8352 7/8108.7102.995.657104.24 3/4＂BSW120.6659.2372 3/4114.74108.6255.9151105＂BSW127.0059.2372 3/4121.09115.1765.915116.55 1/4＂BSW133.3559.6772 5/8127.159120.9636.196122.55 1/2＂BSW139.7059.6772 5/8133.509127.3136.196128.55 3/4＂6＂BSWBSW146.055152.40610.1610.162 1/22 1/2139.549145.9133.043139.3946.5066.506134.5141英制普通螺纹 -- 细牙 -- BSF英制普通螺纹 (惠氏螺纹) -- 细牙 (BSW)每英寸牙大径螺距数中径小径mmmmtpimm外螺纹d=Dpd2=D2d34.7630.794324.2553.7475.5560.907284.9754.3946.350.977265.7255.17.1420.977266.5185.37.9381.156227.1996.4599.5251.27208.7127.911.1131.4111810.2099.30412.71.5881611.68410.66814.2881.5881613.27212.25615.8751.8141414.71213.54917.4631.8141416.315.13719.052.1171217.69316.33620.6382.1171219.28117.92422.2252.3091120.74719.26925.42.541023.77422.14828.5752.822926.76924.96331.752.822929.94428.13834.9253.175832.330.86138.13.175836.06834.031.2753.175839.24337.21144.453.629742.12639.80250.83.629748.476.15257.154.234654.4451.7363.54.234660.7958.0869.854.234667.14.4376.25.08572.94669.69282.555.08579.29676.04288.95.54 1/285.28581.6795.255.54 1/291.63588.02101.65.54 1/297.98594.37107.956.354103.88699.82255°圆柱管螺纹的型式和尺寸
名义尺寸BSF3/167/321/49/325/163/87/161/29/165/811/163/413/167/81.001 1/81 1/41 3/81 1/21 5/81 3/422 1/42 1/22 3/433 1/43 1/23 3/444 1/4牙型代号BSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSF牙型高H10.5080.5810.6250.6250.7390.8130.9041.0171.0171.1621.1621.3551.3551.4791.6271.8071.8072.0332.0332.0332.3242.3242.7112.7112.7113.2533.2533.6143.6143.6144.066底孔直径mm44.65.36.16.88.39.711.112.71415.516.7518.2519.7522.7526.528.7531.534.53840.5475359-------螺纹代号G 1/8G 1/4G 3/8G 1/2G 5/8G 3/4G 7/8G 1G 1 1/8G 1 1/4G 1 3/8G 1 1/2G 1 3/4G 2G 2 1/4G 2 1/2G 2 3/4G 3G 3 1/4G 3 1/2G 3 3/4G 4G 4 1/2G 5G 5 1/2G 6基本尺寸1/8＂1/4＂3/8＂1/2＂5/8＂3/4＂7/8＂1＂1 1/8＂1 1/4＂1 3/8＂1 1/2＂1 3/4＂2＂2 1/4＂2 1/2＂2 3/4＂3＂3 1/4＂3 1/2＂3 3/4＂4＂4 1/2＂5＂5 1/2＂6＂British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF)每英寸牙大径螺距数中径小径牙型高度底孔尺寸mmmmtpimm外螺纹H1mmd=Dpd2=D2d39.7280.9072.1478.5660.5818.713.1571.3371912.30111.4450.85611.616.6621.3371915.80614.950.8561520.9551.8141419.79318.6311.1621922.9111.8141421.74920.5871.16220.7526.4411.8141425.27924.1171.16224.530.2011.8141429.03927.8771.1622833.2492.3091131.7730.2911.47930.537.72.3091136.41834.9391.4793541.912.3091140.43138.9521.47939.544.3232.3091142.84441.3651.47941.547.8032.3091146.32444.8451.4794553.7462.3091152.26750.7881.4795159.6142.3091158.13556.6561.4795765.712.30911.23162.7521.4796375.1842.3091173.70572.2261.47972.581.5342.3091180.05578.5761.4797987.8842.3091186.40584.9261.47985.593.982.3091192.50191.0221.47991100.332.3091198.35197.3721.47997.75106.682.30911105.201103.7221.479104113.032.30911111.55110.0721.479110.5125.732.30911124.251122.7721.479123138.432.30911136.951135.4721.479136151.132.30911149.651148.1721.479148.5163.832.30911162.351160.8721.479161.5RC2英寸
锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.即1.479，锥度是固定的即1：16
R等于1/32乘以长度1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32
长度意思是：定位点加有效长度比如我定位3.0，有效长度是12.0R=1/32 X（3+12）=0.46875
1、密封管螺纹（R） 英制密封管螺纹的基本尺寸及其公差 配合方式
英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合.
欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的ISO英
制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.
编辑本段密封管螺纹的标记
英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成. 英制密封圆柱内螺纹的特征代号为：RP；
英制密封圆锥内螺纹的特征代号为：RC； 英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）； R2（与英制密封圆锥内螺纹配合使用）； 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥”和“锥/锥”螺纹副.
2、非密封管螺纹 英制非密封管的基本尺寸及其极限偏差 标记: 英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成. 英制非密封圆柱螺纹的特征代号为：G
对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B. 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号. 示例： 尺寸代号为2的右旋，非密封圆柱内螺纹：G2 尺寸代号为3的A级，右旋，非密封圆柱外螺纹：G3A 尺寸代号为4的B级，左旋，非密封圆柱外螺纹：G4B-LH 尺寸代
号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A 加工内孔螺纹的是管螺纹丝锥加工外螺纹的有板牙。 其他： 55°圆锥管螺纹的转化
55°圆锥管螺纹，是指螺纹的牙型角为55°、螺纹具有1：16的锥度。该系列螺纹在世界上应用广泛，它的代号，各国规定不同。 中国 英国 法国 日本iso
代号 ZGR（外） GPT R
R(外螺纹) Rc（内）R R Rc 60°圆锥管螺纹的转化
60°圆锥管螺纹是指牙型角为60°、螺纹锥度为1：16的管螺纹，此系列螺纹在我国机床行业和美国、前苏联应用。它的代号，我国过
去规定为K，后来规定为Z，现在改为NPT.
