DIA

(d)

Pitch

b1

(b2) L < 125

(b2) L = 125- 200

(b2) L ≥ 200

X1

X2

M8

1.25

8

22

28

–

3.2

1.6

M10

1.5

10

26

32

45

3.8

1.9

M12

1.75

12

30

36

49

4.3

2.2

M14

2

14

34

40

53

5

2.5

M16

2

16

38

44

57

5

2.5

M18

2.5

18

42

48

61

6.3

3.2

M20

2.5

20

46

52

65

6.3

3.2

M22

2.5

22

50

56

69

6.3

3.2

M24

3

24

54

60

73

7.5

3.8

M27

3

27

60

66

79

7.5

3.8

M30

3.5

30

66

72

85

9

4.5

M33

3.5

33

72

78

91

9

4.5

M36

4

36

78

84

97

10

5

M39

4

39

84

90

103

10

5

M42

4.5

42

90

96

109

11

5.5

M45

4.5

45

96

102

115

11

5.5

M48

5

48

102

108

121

12.5

6.3

M52

5

52

110

116

129

12.5

6.3