Code No.

Nominal Size

Pitch

Basic Major Dia

Class

𝐋

𝑙

𝑙1

𝑙2

𝑑

𝑘

𝑙k

Flutes

Type

M 3

0.5

3.650

1b

52

13

21

-

5

4

7

3

2

M 4

0.7

4.909

1b

60

16

25

-

5.5

4.5

7

3

2

M 5

0.8

6.039

1b

62

29

30

-

6

4.5

7

3

2

M 6

1

7.299

1b

70

22

-

31

6.2

5

8

3

3

M 8

1.25

9.624

1b

75

24

-

32

7

5.5

8

3

3

M 10

1.5

11.949

1b

82

29

-

32

8.5

6.5

9

3

3

M 12

1.75

14.273

1b

90

30

-

35

10.5

8

11

3

3