圆弧螺纹

30˚

P = 25.4/n

(n-每英寸牙数)

0.5P

D

D-2h

间隙z = 0.05P

0.2385P

方牙螺纹

-

2

3

3

0.5P+

(0.1~0.2)

D

D-2h

0.5P+

(0.03~0.05)

P-w

螺旋升角λ = 1˚49'

阿基米德螺纹

14.5˚

πmc

2.157 mc

D

D-2h

1.054 mc

轴向模数mc = 2

三角形螺纹

30˚

2.5

3.5

4

0.5413P

D

D-2h

0.125P

0.125P~0.166P

0.108P~0.144P

55˚圆锥管螺纹

55˚

P = 25.4/n

(n-每英寸牙数)

0.64P

D

D-2h

锥度角Φ

1˚47'24''

0.137P

55˚圆柱管螺纹

55˚

P = 25.4/n

(n-每英寸牙数)

0.64P

D

D-2h

-

0.137P

MJ螺纹

60˚

1.5

2

2

0.487P

D

D-2h

0.125P

0.3125P

0.15P~0.18P