1、M米制粗牙螺紋基本牙型與尺寸和公差帶 代號（大徑）d = D螺 距P螺紋中徑d2 = D2外螺紋小徑d1內螺紋小徑D1外 螺 紋全 齒 高H2配合齒高H1螺紋中徑尺寸（6H公差帶級別）絲錐螺紋中徑(H2公差帶級別為例)minmaxminmaxM30.52.6722.3872.4590.3070.2712.6752.7752.6992.714M3.50.63.1102.7642.8500.3680.3253.1103.2223.1373.155M40.73.5453.1413.2420.4290.3793.5453.6633.5743.593M50.84.4804.0194.1340.4910.

2、4334.4804.6054.5105.530M61.05.3504.7734.9370.6130.5415.3505.5005.3855.408M71.06.3505.7735.9370.6130.5416.3506.5006.3856.408M81.257.1886.4666.6470.7670.6777.1887.3487.2267.251M101.59.0268.1608.3760.9200.8129.0269.2069.0689.096M121.7510.8639.85310.1061.0740.94710.86311.06310.91110.943M142.012.70111.54

3、611.8351.2271.08312.70112.91312.75212.786M162.014.70113.54613.8351.2271.08314.70114.91314.75214.786M182.516.37314.93315.2941.5341.35316.37616.60016.43016.466M202.518.37616.93317.2941.5341.35318.37618.60018.43018.466M222.520.37618.93319.2941.5341.35320.37620.60020.43020.466MF米制細牙螺紋基本牙型與尺寸和公差帶 代號（大徑）d

4、 = D螺 距P螺紋中徑d2 =D2外螺紋小徑d1內螺紋小徑D1外 螺 紋全 齒 高H2配合齒高H1螺紋中徑尺寸（6H公差帶級別）絲錐螺紋中徑(H2公差帶級別為例)minmaxminmaxM30.352.7732.5712.6210.2150.1892.7732.8632.7942.809M3.50.352.2733.0713.1210.2150.1893.2733.3633.2943.309M40.53.6753.3873.4590.3070.2713.6753.7753.6993.714M50.54.6754.3874.4590.3070.2714.6754.7754.6994.714M6

5、0.755.5135.0805.1880.4600.4065.5135.6455.5455.566M81.07.3506.7736.9170.6130.5417.3507.5007.3857.408M101.09.3508.7738.9170.6130.5419.3509.5009.3859.408M101.259.1888.4668.6470.7670.6779.1889.3489.2269.251M121.2511.18810.46610.6470.7670.67711.18811.36811.22611.251M121.511.02610.16010.3760.9200.81211.02

6、611.21611.06811.096M141.513.02612.16012.3760.9200.81213.02613.21613.06813.096M161.515.02614.16014.3760.9200.81215.02615.21615.06815.096M181.517.02616.16016.3760.9200.81217.02617.21617.06817.096M182.016.70115.54615.8351.2271.08316.70116.91316.75216.786M201.519.02618.16018.3760.9200.81219.02619.21619.

7、06819.096M202.018.70117.54617.8351.2271.08318.70118.91318.75218.786M221.521.02620.16020.3760.9200.81221.02621.21621.06821.096M222.020.70119.54619.8351.2271.08320.70120.91320.75220.786UNC統一粗牙螺紋基本牙型與尺寸和公差帶 代 號（螺紋直徑25.4m內牙數）螺 距P螺紋大徑d =D螺紋中徑d2=D2內螺紋小徑D1外螺紋小徑d1螺紋中徑尺寸絲錐螺紋中徑2B 3Bmin2Bmax3BmaxminmaxNO.5400.

8、6353.1752.7462.4872.3952.7642.8472.8272.7762.789NO.6320.7943.5052.9902.6472.5322.9903.0843.0583.1053.028NO.8320.7944.1663.6503.3073.1933.6503.7463.7213.6753.688NO.10241.0584.8264.1383.6803.5284.1384.2474.2194.9634.176NO.12241.0585.4864.7984.3414.1884.7984.9104.8824.8234.836UNC1/4"-201.2706.3505

9、.5244.9764.7935.5245.6465.6165.5755.588UNC5/16"-181.4117.9387.0216.4116.2057.0217.1557.1207.0717.084UNC3/8"-161.5889.5258.4947.8057.5778.4948.6398.6038.5458.557UNC7/16"-141.81411.1129.9349.1498.8879.93410.08910.0519.9859.997UNC1/2"-131.95412.70011.43010.58410.30211.43011.59511.55

10、211.48111.494UNC9/16"-122.11714.28812.91311.99611.69212.91313.08613.04312.96412.977UNC5/8"-112.30915.87514.37613.37613.04314.37614.55914.51414.42714.440UNC3/4"-102.54019.05017.39916.22915.93317.39917.59517.54417.45017.463UNC7/8"-92.82222.22520.39019.16918.76320.39120.59920.54620.

11、45520.467UNC1"-83.17525.40023.33821.96321.50423.33823.56123.50523.40123.414UNF統一細牙螺紋基本牙型與尺寸和公差帶 代 號（螺紋直徑25.4m內牙數）螺 距P螺紋大徑d =D螺紋中徑d2=D2內螺紋小徑D1外螺紋小徑d1螺紋中徑尺寸絲錐螺紋中徑 ( 2 級 )2B 3Bmin2Bmax3BmaxminmaxNO.5440.5773.1752.7992.5502.4662.7992.8802.8602.8122.824NO.6400.6353.5053.0942.8172.7253.0943.1803.1573

12、.1083.119NO.8360.7064.1663.7083.4013.2993.7083.8003.7773.7213.734NO.10320.7944.8264.3103.9763.8534.3104.4094.3844.3364.348NO.12280.9075.4864.8974.5034.3744.8975.0044.9764.9234.935UNC1/4"-280.9076.3505.7615.3675.2375.7615.8705.8425.7995.812UNC5/16"-241.0587.9387.2496.7926.6407.2497.3717.341

13、7.2877.300UNC3/8"-241.0589.5258.8378.3798.2278.8378.9618.9318.8758.887UNC7/16"-201.27011.11210.2879.7389.55510.28710.42410.39110.33810.351UNC1/2"-201.27012.70011.87411.32611.14311.87412.01711.98111.92511.938UNC9/16"-181.41114.28813.37112.76112.55513.37113.52013.48213.42113.434UNC

14、5/8"-181.41115.87514.95814.34814.14314.95815.11015.07215.00915.022UNC3/4"-161.58819.05018.01917.33017.10218.01918.18418.14318.07018.082UNC7/8"-141.81422.22521.04620.26220.00021.04621.22421.18121.11021.123UNC1"-122.11725.40024.02623.10922.80424.02624.21924.17124.08924.102G( BSP )

15、非螺紋密封的管螺紋基本牙型與尺寸 螺紋代號每25.4mm內牙數螺 距Pmm螺紋大徑d=Dmm螺紋中徑d2=D2mm螺紋小徑d1=D1mmH1mmRmm螺紋中徑公差帶絲錐螺紋中徑公差帶minmaxminmaxG 1/8280.9079.7289.1478.5660.5810.1259.1479.2549.1779.194G 1/4191.33713.14712.30111.4450.8560.18412.30112.42612.36612.356G 3/8191.33716.66215.80614.9500.8560.18415.80615.93315.80115.861G 1/2141.814

16、20.95519.79318.6311.1620.24919.79319.93519.82819.848G 5/8141.81422.91121.74920.5871.1620.24921.74921.89121.78421.804G 3/4141.81426.44125.27924.1171.1620.24925.27925.42125.31425.334G 7/8141.81432.20129.03927.8771.1620.24929.03929.18129.07429.094G 1112.30933.24931.77030.2911.4790.31731.77031.95031.815

17、31.839G 1-1/8112.30937.89736.41834.9391.4790.31736.41836.59836.46336.487G 1-1/4112.30941.91040.43138.9521.4790.31740.43140.61140.47640.500G 1-3/8112.30944.32342.84441.3651.4790.31742.84443.02442.88942.913G 1-1/2112.30947.80346.32444.8451.4790.31746.32446.50446.37446.398G 1-3/4112.30953.74652.26750.7

18、881.4790.31752.26752.44752.32752.354G 2112.30959.61458.13556.6561.4790.31758.13558.31558.19558.222絲錐圖標與符號說明:螺紋類型 : 螺孔型式 M米制粗牙普通螺紋 T1通孔 1.2dMF米制細牙普通螺紋 T2通孔 2dUNC統一粗牙螺紋 B1不通孔1.2dUNF統一細牙螺紋 B2不通孔 1.8dG（BSP）非螺紋密封的管螺紋 B3不通孔 2.2dW（BSW）惠氏螺紋NPT60°牙形角圓錐管螺紋 d 為螺紋大徑RP用螺紋密封的圓柱管螺紋RC（BSPT）用螺紋密封的圓柱管螺紋EC安裝鋼絲螺套用內螺紋螺紋齒形角: 絲錐類別: 60° 55° N加工普通結構鋼、軟的灰鑄鐵 中等硬度的有色金屬 H加工特別硬的、硬而韌的材料 W加工特別軟與韌的材料絲錐結構種類： 絲錐切削錐長度： 直槽絲錐 X（56 P）螺尖絲錐 Y（45 P）螺旋槽絲錐 Z （23 P）跳牙絲錐 A型帶冷卻孔絲錐（用于不通孔） 絲錐柄部采用的標準：B型帶冷卻孔絲錐（用于通孔） GB4267擠壓絲錐 DIN10-1帶油槽擠壓絲錐 鉆攻復合絲錐 絲錐螺紋公差帶等級：絲錐采用的標準： H1適合加工米制內螺紋4H 5H公差 中國國家標準 帶級