Size

Width Across Flat (s)

Head Height (k)

Thread Length

DIN 931

DIN 931

DIN 931 Length (in MM)

Min

Max

Min

Max

≥125

>125≥200

≥200

M2

3.82

4

1.28

1.52

10

-

-

M3

5.32

5.5

1.88

2.12

12

-

-

M4

6.78

7

2.68

2.92

14

-

-

M5

7.78

8

3.35

3.65

16

22

-

M6

9.78

10

3.85

4.15

18

24

-

M8

12.73

13

5.15

5.45

22

28

41

M10

16.73

17

6.22

6.58

26

32

45

M12

18.67

19

7.32

7.68

30

36

49

M14

21.67

22

8.62

8.98

34

40

53

M16

23.67

24

9.82

10.2

38

44

57

M18

26.67

27

11.28

11.7

42

48

61

M20

29.67

30

12.28

12.7

46

52

65

M22

31.61

32

13.78

14.2

50

56

69

M24

35.38

36

14.78

15.2

54

60

73

M27

40

41

16.65

17.4

60

66

79

M30

45

46

18.28

19.1

66

72

85

M33

49

50

20.58

21.4

72

78

91

M36

53.8

55

22.08

22.9

78

84

97

M39

58.8

60

24.58

25.4

84

90

103

M42

63.1

65

25.58

26.4

90

96

109

M45

68.1

70

27.58

28.4

96

102

115

M48

73.1

75

29.58

30.4

102

108

121

M52

78.1

80

32.5

33.5

-

116

129

M56

82.8

85

34.5

35.5

-

124

137

M60

87.8

90

37.5

38.5

-

132

145

M64

92.8

95

39.5

40.5

-

140

153

M72

102.8

105

44.5

45.5

-

156

169