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1、英制普通螺纹 (惠氏螺纹) - 小螺纹系列 (BA) 名义尺寸 牙型代号 大径螺距 每英寸牙 数中径小径牙型高底孔直径 BAmmmmtpimm外螺纹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。

2、.2351.5 No. 8BA2.20.4359.071.941.680.261.8 No. 7BA2.50.4852.922.211.920.292 No. 6BA2.80.5347.922.482.160.322.3 No. 5BA3.20.5943.052.8452.490.3552.6 No. 4BA3.60.6638.483.2052.810.3952.95 No. 3BA4.10.7334.793.663.220.443.4 No. 2BA4.70.8131.354.2153.730.4853.9 No. 1BA5.30.928.224.764.220.544.4 No. 0BA6。

3、125.45.44.80.65 5555圆圆锥锥管管螺螺纹纹型型式式和和尺尺寸寸 (2006-03-13 14:38:47 ) 螺纹代号 基本尺寸大径螺距 每英寸牙 数中径小径牙型高度圆弧尺寸底孔尺寸 英 寸mmmmtpimm外螺纹H1rmm d=Dpd2=D2d3 R 1/161/167.7230.907287.1426.5610.5810.1256.4 R 1/81/89.7280.907289.1478.5660.5810.1258.4 R 1/41/413.1571.3371912.30111.4450.8560.18411.2 R 3/83/816.6621.3371915.8061。

4、4.950.8560.18414.75 R 1/21/220.9551.8141419.79318.6311.1620.24918.25 R 3/43/426.4411.8141425.27924.1171.1620.24923.75 R 1133.2492.3091131.7730.2911.4790.31730 R 1 1/41 1/441.912.3091140.43138.9521.4790.31738.5 R 1 1/21 1/247.8032.3091146.32444.8451.4790.31744.5 R 2259.6142.3091158.13556.6561.4790.31。

5、756 R 2 1/22 1/275.1842.3091173.70572.2261.4790.31771 R 3387.8842.3091186.40584.9261.4790.31785.5 R 44113.032.30911111.551110.0721.4790.317110.5 R 55138.432.30911136.951135.4721.4790.317136 R 66163.832.30911162.351160.8721.4790.317161.5 制制惠惠氏氏螺螺纹纹的的型型式式尺尺寸寸 英制普通螺纹 (惠氏螺纹) - 粗牙 (BSW) 名义尺寸 牙型代号 大径螺距 每英。

6、寸牙 数中径小径牙型高底孔直径 Wwmmmmtpimm外螺纹H1mm d=Dpd2=D2d3 1/16BSW1.5870.423601.3151.050.271.15 3/32BSW2.3810.529482.0411.7030.3381.9 1/8BSW3.1750.635402.7682.3620.4062.5 5/32BSW3.9690.793323.4592.9520.5073.2 3/16BSW4.7621.058244.0843.4070.6773.7 7/32BSW5.5561.058244.8784.2010.6774.5 1/4BSW6.351.27205.5374.7240。

7、.8135.1 5/16BSW7.9381.411187.0346.1310.9046.5 3/8BSW9.5251.588168.5097.4921.0177.9 7/16BSW11.1131.814149.9518.7891.1629.2 1/2BSW12.72.1171211.3459.991.35510.4 5/8BSW15.8762.3091114.39712.9181.47913.4 3/4BSW19.0512.541017.42415.7981.62716.25 7/8BSW22.2262.822920.41918.6111.80719.25 1BSW25.43.175823.3。

8、6821.3352.03322 1 1/8BSW28.5763.629726.25323.9292.32424.5 1 1/4BSW31.7513.629729.42827.1042.32427.25 1 3/8BSW34.9264.233632.21529.5052.71130.25 1 1/2BSW38.14.233635.39132.682.71133.5 1 5/8BSW41.2775.08538.02434.7713.25335.5 1 3/4BSW44.4525.08541.19937.9463.25338.5 1 7/8BSW47.6275.6454 1/244.01240.39。

9、83.61441.25 2BSW50.8025.6454 1/247.18743.5733.61444.5 2 1/4BSW57.1526.35453.08649.024.06650 2 1/2BSW63.5026.35459.43655.374.06656 2 3/4BSW69.8537.2573 1/265.20560.5584.64761.5 3BSW76.2037.2573 1/271.55666.9094.64768 3 1/4BSW82.5537.8163 1/477.54872.5445.00573.75 3 1/2BSW88.9037.8163 1/483.89978.8945。

10、.00580 3 3/4BSW95.2548.467389.83284.415.42285.5 4BSW101.6048.467396.18290.765.42292 4 1/4BSW107.9548.8352 7/8102.29796.6395.65798 4 1/2BSW114.3048.8352 7/8108.647102.995.657104.2 4 3/4BSW120.6659.2372 3/4114.74108.6255.915110 5BSW127.0059.2372 3/4121.09115.1765.915116.5 5 1/4BSW133.3559.6772 5/8127.。

11、159120.9636.196122.5 5 1/2BSW139.7059.6772 5/8133.509127.3136.196128.5 5 3/4BSW146.05510.162 1/2139.549133.0436.506134.5 6BSW152.40610.162 1/2145.9139.3946.506141 英英制制普普通通螺螺纹纹 - 细细牙牙 - BSFBSF 英制普通螺纹 (惠氏螺纹) - 细牙 (BSW) 名义尺寸 牙型代号 大径螺距 每英寸牙 数中径小径牙型高底孔直径 BSFmmmmtpimm外螺纹H1mm d=Dpd2=D2d3 3/16BSF4.7630.7943。

12、24.2553.7470.5084 7/32BSF5.5560.907284.9754.3940.5814.6 1/4BSF6.350.977265.7255.10.6255.3 9/32BSF7.1420.977266.5185.8930.6256.1 5/16BSF7.9381.156227.1996.4590.7396.8 3/8BSF9.5251.27208.7127.8990.8138.3 7/16BSF11.1131.4111810.2099.3040.9049.7 1/2BSF12.71.5881611.68410.6681.01711.1 9/16BSF14.2881.5881。

13、613.27212.2561.01712.7 5/8BSF15.8751.8141414.71213.5491.16214 11/16BSF17.4631.8141416.315.1371.16215.5 3/4BSF19.052.1171217.69316.3361.35516.75 13/16BSF20.6382.1171219.28117.9241.35518.25 7/8BSF22.2252.3091120.74719.2691.47919.75 1.00BSF25.42.541023.77422.1481.62722.75 1 1/8BSF28.5752.822926.76924.9。

14、631.80726.5 1 1/4BSF31.752.822929.94428.1381.80728.75 1 3/8BSF34.9253.175832.89330.8612.03331.5 1 1/2BSF38.13.175836.06834.0362.03334.5 1 5/8BSF41.2753.175839.24337.2112.03338 1 3/4BSF44.453.629742.12639.8022.32440.5 2 BSF50.83.629748.47646.1522.32447 2 1/4BSF57.154.234654.4451.732.71153 2 1/2BSF63.。

15、54.234660.7958.082.71159 2 3/4BSF69.854.234667.1464.432.711- 3 BSF76.25.08572.94669.6923.253- 3 1/4BSF82.555.08579.29676.0423.253- 3 1/2BSF88.95.6454 1/285.28581.673.614- 3 3/4BSF95.255.6454 1/291.63588.023.614- 4 BSF101.65.6454 1/297.98594.373.614- 4 1/4BSF107.956.354103.88699.8224.066- 5555圆圆柱柱管管螺。

16、螺纹纹的的型型式式和和尺尺寸寸 British Pipe Thread (惠氏管螺纹) - 圆柱 (BSPP/BSPF) 螺纹代号基本尺寸 大径螺距 每英寸牙 数中径小径牙型高度底孔尺寸 mmmmtpimm外螺纹H1mm d=Dpd2=D2d3 G 1/81/89.7280.907289.1478.5660.5818.7 G 1/41/413.1571.3371912.30111.4450.85611.6 G 3/83/816.6621.3371915.80614.950.85615 G 1/21/220.9551.8141419.79318.6311.16219 G 5/85/822.911。

17、1.8141421.74920.5871.16220.75 G 3/43/426.4411.8141425.27924.1171.16224.5 G 7/87/830.2011.8141429.03927.8771.16228 G 1133.2492.3091131.7730.2911.47930.5 G 1 1/81 1/837.8972.3091136.41834.9391.47935 G 1 1/41 1/441.912.3091140.43138.9521.47939.5 G 1 3/81 3/844.3232.3091142.84441.3651.47941.5 G 1 1/21 1。

18、/247.8032.3091146.32444.8451.47945 G 1 3/41 3/453.7462.3091152.26750.7881.47951 G 2259.6142.3091158.13556.6561.47957 G 2 1/42 1/465.712.3091164.23162.7521.47963 G 2 1/22 1/275.1842.3091173.70572.2261.47972.5 G 2 3/42 3/481.5342.3091180.05578.5761.47979 G 3387.8842.3091186.40584.9261.47985.5 G 3 1/43。

19、 1/493.982.3091192.50191.0221.47991 G 3 1/23 1/2100.332.3091198.35197.3721.47997.75 G 3 3/43 3/4106.682.30911105.201103.7221.479104 G 44113.032.30911111.55110.0721.479110.5 G 4 1/24 1/2125.732.30911124.251122.7721.479123 G 55138.432.30911136.951135.4721.479136 G 5 1/25 1/2151.132.30911149.651148.172。

20、1.479148.5 G 66163.832.30911162.351160.8721.479161.5 RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高(深)=2.3090.64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12.0 R=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。

21、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. 编编辑辑本本段段密密封封管管螺螺纹纹的的标标记记 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； 螺纹代号基本尺寸 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。

22、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。

23、螺纹：G3A 尺寸代号为4的B级，左旋，非密封圆柱外螺纹：G4 B-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 ZG R(外) G PT 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.。