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螺纹底孔直径对照表

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HSS硬质合金

1.61.65

2.52.55

3.33.4

4.24.3

5.05.1

6.86.9

8.58.7

10.310.5

12.012.2

14.014.2

15.515.7

17.517.7

21.0

……

26.5……

32.0……

37.5……

40.5……

43.0……M3×0.5

M4×0.7

M5×0.8

M6×1.0M2×0.4螺纹代号

M2×0.2

M16×2.0

M18×2.5

M20×2.5

M24×3.0M8×1.25

M10×1.5

M12×1.75

M14×2.0公制普通粗牙螺纹

M48×5.0M30×3.5M3×0.3

M4×0.

M5×0.

M6×0.7螺纹代号钻头直径

M36×4.0

M42×4.5

M45×4.5M8×1.

M10×1

M10×0.

M18×1M8×0.7

M14×1

M14×1M10×1.

M12×1

M12×1.

M12×1

M18×1

M20×2

M20×1

M20×1M16×1

M16×1

M24×2

M24×1

M24×1

M30×螺纹底孔直径攻螺纹前底孔直径的确定

M36×

1

M42×M30×1

M36×3

M36×

M42×1

M45×M30×

M30×1

M48×

M48×

M48×1M45×

M45×

M45×1

M48×M42×

M42×

螺纹公称直径（"）

1/8 1/4

3/8 1/2

3/4

每25.4mm内牙数2819191414

钻头直径（mm）8.811.715.218.924.4

（3）英制锥管螺纹和英制锥螺纹攻丝前钻底（2）非螺纹密封的管螺纹攻螺纹前钻底孔

英制锥管螺纹英制锥螺纹

公称直径每25.4mm钻头直径公称直径每25.4mm钻头直

径

（"）内牙数（mm）（"）内牙数（mm）

1/8288.4 1/8278.6

1/41911.2 1/41811.1

3/81914.7 3/81814.5

1/21418.3 1/21417.9

3/41423.6 3/41423.2

11129.71111/229.2

1 1/41138.31 1/4111/237.9

1 1/21144.11 1/2111/243.9

21155.82111/256

HSS硬质合金

1.751.75

2.72.7

3.53.55

4.54.55

6.36.35

77.1

7.37.35

99.1

8.88.9

9.39.35

10.510.7

10.810.9

1111.1

12.512.7

13.013.1

14.514.7

15.015.1

16.516.7

1717.1

1818.3

18.518.7

1919.1

22.0……

22.5……

23.0……

27……公制细牙螺纹

纹代号钻头直径

2×0.25

3×0.35

4×0.5

5×0.5

6×0.75

8×1.0

10×1.0

0×0.75

18×1.58×0.75

14×1.5

14×1.00×1.25

12×1.5

2×1.25

12×1.0

18×1.0

20×2.0

20×1.5

20×1.016×1.5

16×1.0

24×2.0

24×1.5

24×1.0

M30×3

28……

28.5……

29……

33.0……

34.0……

34.5……

38……

39……

40……

40.5……

41……

42……

43……

43.5……

44.0……

45.0……

46.0……

46.5……

的钻头直径的确定36×1.5

M42×430×1.5

36×3.0

M36×2

42×1.5

M45×4M30×2

30×1.5

M48×3

M48×2

48×1.5M45×3

M45×2

45×1.5

M48×4M42×3

M42×2

11 1/41 3/81 1/2

11111111

30.639.241.345.1

前钻底孔的钻头直径钻底孔的钻头直径

合集下载

螺纹底孔对照表

螺纹底孔对照表

ST钢丝套螺纹螺距P（mm）铸铁底孔（mm）碳钢底孔（mm）螺纹底孔小径d（mm）10.250.750.751.20.250.950.951.60.351.251.2520.41.61.62.092.50.452.12.12.630.52.52.53.1140.73.33.34.1550.84.14.25.17614.956.2281.256.66.78.27101.58.38.510.32121.7510.310.412.3814211.71214.4316213.81416.43182.515.315.518.54202.517.317.520.54222.519.319.522.5424310.82124.6527323.82427.65303.526.326.530.76333.529.329.533.7636431.73236.87攻钢件时可用机油润滑，螺纹质量要求高时可用工业植物油；攻铸铁时可用煤油。米制普通粗牙螺纹公称直径D（mm）螺纹底孔对照表

普通米制螺纹底孔可用下式做近似计算d=D-1.0825P D为公称直径;P为螺距。

螺纹底孔

螺纹底孔

内螺纹底孔尺寸 螺纹底孔加工尺寸(公制粗牙) 螺纹底孔加工尺寸(常用公制细牙)螺纹尺寸螺距mm底孔直径Фmm螺距mm底孔直径ФmmM101.258.75～7.91最小值最大值M1.60.351.25～1.32M1019～9.151/8402.42.6M20.41.6～1.67M100.759.25～9.373/16243.563.8M2.50.452.05～2.13M121.510.5～10.671/4204.95.2M30.52.5～2.59M121.2510.75～10.915/16186.346.65M40.73.3～3.42M12111～11.153/8167.738.05M50.84.2～4.33M141.512.5～12.677/16149.069.39M615～5.15M14113～13.151/21210.310.64M81.256.75～6.91M15114～14.159/161211.8912.2M101.58.5～8.67M161.514.5～14.675/81113.2613.6M121.7510.25～10.44M16115～15.153/41016.1716.54M14212～12.3M20218～18.27/8919.0319.4M16214～14.3M201.518.5～18.671821.822.15M182.515.5～15.7M20119～19.151～1/8724.4624.85M202.517.5～17.84M24222～22.21～1/4727.6428.04M222.519.5～19.84M241.522.5～22.61～3/8630.130.54M24321～21.38M24123～23.151～1/2633.3533.74M27324～24.38M25223～23.21～5/8535.5236M303.526.5～26.9M251.523.5～23.671～3/4538.6939.19M271.525.5～25.671～7/84.541.241.743 螺纹底孔加工尺寸(常用公制细牙)M27225～25.224.544.444.94螺纹尺寸螺距mm底孔直径ФmmM27126～26.15M50.54.5～4.59M30228～28.2注：英制粗牙螺纹牙型角为55°M60.755.25～5.37M301.528.5～28.67M817～7.15M30129～29.15M80.757.25～7.37 嵌套螺纹（粗牙）底孔直径表 嵌套螺纹(细牙)底孔直径表 米制锥度螺纹螺纹尺寸钻头直径mm底孔直径mm螺纹尺寸钻头直径mm底孔直径mmM2.5×0.452.62.6～2.65M10×110.310.25～10.42最小值最大值M2.6×0.452.72.7～2.75M10×1.2510.410.31～10.524.54.6英制粗牙螺纹(普通级)螺纹/英寸牙数

公英制螺纹底孔对照表

公英制螺纹底孔对照表

英制螺纹对应公制（mm)底孔直径公制螺纹底孔直径1/8"3.182.70M1.00.805/32"3.973.30M2.01.803/16"4.763.80M3.02.501/4"6.355.10M4.03.305/16"7.946.60M5.04.203/8"9.538.00M6.05.007/16"11.119.40M7.06.001/2"12.7010.70M8.06.805/8"15.8813.70M9.07.803/4"19.0516.70M10.08.507/8"22.2319.50M12.010.301"25.4022.40M14.012.00M16.014.00M18.015.50M20.017.50M22.019.50M24.021.00公英制螺纹底孔对照表

以上单位除X"外为毫米

管螺纹尺寸对照表(全)

管螺纹尺寸对照表(全)

1/16281分1/8282分DN81/4193分3/8194分DN151/221.32.82.45146分DN203/426.92.82.45141寸DN25133.73.22.8111.2寸DN321.1/442.43.53.06111.5寸DN401.1/248.33.53.06112寸DN50260.33.83.325112.5寸DN652.1/276.143.5113寸DN80388.94113.5寸3.1/2114寸DN1004114.34115寸DN12551404.5116寸DN1506168.34.5118寸DN2008219.110寸DN250

1/16271/8271/4181英寸=25.4mm=8分 以上壁厚尺寸以焊管、镀锥管螺纹的基本尺寸表（3-28）螺纹基本尺管螺纹的基本尺寸表（3-29）G1/2

每25.4mm类的牙数n通称尺寸对应口径尺寸代号

尺寸代号外径壁厚最小壁厚每25.4mm类的牙数n3/8181/2143/4141121.1/4121.1/2122122.1/28383.1/2848大径（基准直径）d=D中径d2=D2小径d1=D10.9070.5810.1257.7237.1426.56140.9070.5810.1259.7289.1478.56641.3370.5860.18413.15712.30111.44561.3370.5860.18416.66215.80614.95061.8141.1620.24920.95519.79318.63181.8141.1620.24926.44125.27924.117102.3091.4790.31733.24931.77030.291102.3091.4790.31741.91040.43138.952132.3091.4790.31747.80346.32444.845132.3091.4790.31759.61458.13556.656162.3091.4790.31775.18473.70572.226182.3091.4790.31787.88486.40584.926212.3091.4790.317100.33098.85197.372222.3091.4790.317113.030111.551110.072252.3091.4790.317138.430136.951135.472292.3091.4790.317163.830162.351160.87229