Size.

Pitch (p)

Width across corner (e)

Width across Flat (s)

Thickness (m)

da

dw

Minor diameter (Bore) (d)

Dia.

MM

Min.

Min.

Max.

Min.

Max.

Min

Max.

Min.

Min.

Max.

M12

1.75

23.91

21.16

22.00

9.64

10.00

12.00

13.00

20.10

10.20

10.30

M16

2.0

29.56

26.16

27.00

12.30

13.00

16.00

17.30

24.90

12.10

12.20

M20

2.5

35.03

31.00

32.00

14.90

16.00

20.00

21.60

29.50

17.60

17.70

M22

2.5

39.55

35.00

36.00

16.90

18.22

22.00

23.70

33.30

19.60

19.70

M24

3.0

45.20

40.00

41.00

18.70

21.00

24.00

25.90

38.00

20.70

20.80

M27

3.0

50.85

45.00

46.00

20.70

22.00

27.00

29.10

42.80

23.80

23.90

M30

3.5

55.37

49.00

50.00

22.70

24.00

30.00

32.40

46.60

26.50

26.60

M36

4.0

66.44

58.80

60.00

27.70

29.00

36.00

38.90

55.90

32.10

32.20

M42

4.5

76.95

68.10

70.00

32.40

34.00

36.00

38.90

64.70

37.70

37.80

M45

4.5

82.60

73.10

75.00

34.40

36.00

39.00

42.10

69.50

40.90

41.00

M48

5.0

88.25

78.10

80.00

36.40

38.00

42.00

45.40

74.20

43.10

43.20

M56

5.5

99.20

87.80

90.00

43.40

45.00

45.00

48.60

83.40

50.80

50.90

M64

6.0

110.50

97.80

100.00

49.10

51.00

48.00

51.80

92.90

57.80

57.90