螺紋規格d

M16

M20

M22

M24

M27

M30

螺距p

2

2.5

2.5

3

3

3.5

d_a

max

18.83

24.4

26.4

28.4

32.84

35.84

d_s

max

16.43

20.52

22.52

24.52

27.84

30.84

min

15.57

19.48

21.48

23.48

26.16

29.16

d_w

min

27.9

34.5

38.5

41.5

42.8

46.5

d_k

max

30

37

41

44

50

55

k^,

公稱

10

13

14

15

17

19

max

10.75

13.9

14.9

15.9

17.9

20.05

min

9.25

12.1

13.1

14.1

16.1

17.95

k'

min

12

14

15

16

17

18

k"

max

17

19

21

23

24

25

r

min

1.2

1.2

1.2

1.6

2

2

d_b

max

11.3

14.1

15.6

16.9

19.3

21.4

min

11

13.8

15.3

16.6

18.7

20.8

d_c ≈

12.8

16.1

17.8

19.3

21.9

24.4

d_e ≈

13

17

18

20

22

24