HEX NUT

HEX NUT

Heavy Hex Nut Dimensions in mm

Hexagonal Heavy-series nuts used with stud bolt. Heavy hex nut dimensions in inches are covered in ASME B18.2.2 Square and Hex Nuts, however, the dimensions in matrix unit are covered in ASME B18.2.4.6M Heavy Hex Nuts. Here, I have listed the Heavy hex nut dimensions as per ISO and UNC.

heavy hex nut dimensions
 
 

ISO Heavy hex nut dimensions

ISO Nut NB

Across Corners

MAX Thickness

MIN Thickness

MAX Across Flats

MIN Across Flats

M 8

14.38

6.8

6.44

13

12.73

M 10

17.77

8.4

8.04

16

15.73

M 12

20.03

10.8

10.37

18

17.73

M 14

23.35

12.8

12.1

21

20.67

M 16

26.75

14.8

14.1

24

23.67

M 18

29.56

15.8

15.1

27

26.16

M 20

32.95

18

16.9

30

29.16

M 22

37.29

19.4

18.1

34

33

M 24

39.55

21.5

20.2

36

35

M 27

45.2

23.8

22.5

41

40

M 30

50.85

26.6

24.3

46

45

M 33

55.37

28.7

27.4

50

49

M 36

60.79

31

29.4

55

53.8

M 39

66.44

33.4

31.8

60

58.8

M 42

71.3

34

32.4

65

63.1

M 45

76.95

36

34.4

70

68.1

M 48

82.6

38

39.4

75

73.1

M 52

88.25

42

40.4

80

78.1

M 56

93.56

45

43.4

85

82.8

M 60

99.21

48

46.4

90

87.8

M 64

104.86

51

49.1

95

92.8

M 68

110.51

54

52.1

100

97.8

M 72 x 6

116.16

58

56.1

105

102.8

M 76 x 6

121.81

61

59.1

110

107.8

M 80 x 6

127.46

64

62.1

115

112.8

 
 

UNC Heavy hex nut dimensions

UNC Nut N/B

Max Across Corners

Min Across Corners

Max Thickness

Min Thickness

Max Across Flats

Max Across Flats

3/8

20.2

19.4

9.6

8.7

17.5

17

7/16

22

21.1

11.2

10.2

19

18.5

1/2

25.6

24.6

12.8

11.8

22.2

21.6

9/16

27.5

26.3

14.4

13.4

23.8

23.1

5/8

31.2

29.8

16

14.9

27

26.2

3/4

36.7

35.1

19.3

18

31.8

30.8

7/8

42.2

40.4

22.5

21.2

36.5

35.4

1

47.7

45.6

25.7

24.3

41.3

40

1 1/8

53.2

50.8

28.9

27.4

46

44.6

1 1/4

58.6

56.1

31.8

30.1

50.8

49.2

1 3/8

64.2

61.4

35

33.3

55.6

53.8

1 1/2

69.6

66.6

38.2

36.4

60.3

58.4

1 5/8

75.2

71.8

41.5

39.5

65.1

63

1 3/4

80.6

77.1

44.7

42.6

69.9

67.6

1 7/8

86.2

82.3

47.9

45.8

74.6

72.2

2

91.6

87.6

51.1

48.9

79.4

76.8

2 1/4

102.6

98.1

57.2

54.7

88.9

86.1

2 1/2

113.6

108.6

63.6

61

98.4

95.2

2 3/4

124.6

119.1

70.1

67.2

108

104.4

3

135.6

129.6

76.5

73.5

117.5

113.7


 

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