DIN 439

Dimensional Standard of Lock Hex Nut as per DIN 439

β = 15° to 30°
θ = 90° to 120°

Thread

P

da

dw

e

m

s

min.

max.

min.

min.

max.

min.

min.

max.

min.

M12

1.75

12.00

13.00

17.40

21.10

6.00

5.70

4.56

19.00

18.67

M14

2.00

14.00

15.10

20.50

24.49

7.00

6.42

5.14

22.00

21.67

M16

2.00

16.00

17.30

22.50

26.75

8.00

7.42

5.94

24.00

23.67

M18

2.50

18.00

19.50

24.90

29.56

9.00

8.42

6.74

27.00

26.16

M20

2.50

20.00

21.60

27.70

32.95

10.00

9.10

7.28

30.00

29.16

M22

2.50

22.00

23.80

29.50

35.03

11.00

9.90

7.92

32.00

31.00

M24

3.00

24.00

25.90

33.20

39.55

12.00

10.90

8.72

36.00

35.00

M27

3.00

27.00

29.20

38.00

45.20

13.50

12.40

9.90

41.00

40.00

M30

3.50

30.00

32.40

42.70

50.85

15.00

13.90

11.10

46.00

45.00

M33

3.50

33.00

35.60

46.60

55.37

16.50

15.40

12.30

50.00

49.00

M36

4.00

36.00

38.90

51.10

60.79

18.00

16.90

13.50

55.00

53.80

M39

4.00

39.00

42.10

55.90

66.44

19.50

18.20

14.60

60.00

58.80

M42

4.50

42.00

45.40

60.00

71.30

21.00

19.70

15.80

65.00

63.10

M45

4.50

45.00

48.60

64.70

76.95

22.50

21.20

17.00

70.00

68.10

M48

5.00

48.00

51.80

69.40

82.60

24.00

22.70

18.20

75.00

73.10

M52

5.00

52.00

56.20

74.20

88.25

26.00

24.70

19.80

80.00

78.10

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