d

s

a

d₁ min

d₂ approx

M1

0.2

0.15

1.2

0.8

M1.5

0.3

0.25

1.7

1.1

M2

0.4

0.35

2.3

1.5

M2.5

0.5

0.4

2.8

1.8

M3

0.6

0.5

3.3

2.1

M4

0.8

0.65

4.4

2.8

M5

1

0.9

5.4

3.4

M6

1.25

1.2

6.4

3.9

M8

1.5

2

8.5

5.5

M10

2

2

10.5

6.5

M12

2.5

2

12.5

7.5

M16

3

2

16.5

10.5