According to DIN 7991 According to ANSI/ASME B18.3


Hexagon Socket Countersunk Head Cap Screws

                                                                                 According to            :ANSI /ASME B18.3

                                                                                 Material                   :SCM3 (SCM 435)

                                                                                  Hardness                 :HRC 36°–  45°

                                                                                  Surface                     :Temper  Color

                                                                                                                                                              mm

Size(d)

#4

#5

#6

#8

#10

1/4

5/16

3/8

7/16

1/2

Threads per Inch

40

40

32

32

24

20

18

16

14

13

d1

Max

2.84

3.17

3.50

4.16

4.82

6.35

7.93

9.52

11.11

12.70

Min

2.73

3.05

3.37

4.02

4.67

6.18

7.75

9.34

10.90

12.49

D

Max

6.47

7.13

7.79

9.11

10.43

13.48

16.66

19.83

21.43

23.82

Min

5.53

6.09

6.68

7.89

9.11

12.19

15.24

18.28

19.83

22.14

B

Ref

2.10

2.28

2.46

2.84

3.22

4.08

5.02

5.94

5.94

6.37

Tolerance

0.27

0.30

0.33

0.35

0.38

0.40

0.43

0.45

0.45

0.45

   B           Nom

1.57

1.98

1.98

2.38

3.17

3.96

4.77

5.56

6.35

7.92

   M          Min

1.39

1.54

1.67

1.93

2.21

2.81

3.42

4.03

4.03

4.36

   LT         Min

19.05

19.05

19.05

22.35

22.35

25.40

28.45

31.75

35.05

38.10

 

                                       L

                              Nom

                              Kebgtg

     Nom

     Sized

1

1-1/4

1-1/2

1-3/4

2

2-1/4

2-1/2

2-3/4

3

3-31/2

4

4-1/2

5

5-1/2

6

25.4

31.8

38.1

44.5

50.8

57.1

63.5

69.8

76.2

88.9

101.6

114.6

127.0

139.7

152.4

#4

LGH

LBH

 

12.70

9.65

12.70

9.65

25.40

22.35

25.40

22.35

38.10

33.05

 

 

 

 

 

 

 

 

 

#5

LGH

LBH

 

12.70

9.65

12.70

9.65

25.40

22.35

25.40

22.35

38.10

33.05

 

 

 

 

 

 

 

 

 

#6

LGH

LBH

 

12.70

9.65

12.70

8.64

25.40

21.34

25.40

21.34

38.10

34.04

38.10

34.04

50.80

46.74

 

 

 

 

 

 

 

#8

LGH

LBH

 

9.65

5.59

9.65

5.59

22.35

18.29

22.35

18.29

35.05

30.99

30.05

30.99

47.75

43.69

47.75

43.69

 

 

 

 

 

 

#10

LGH

LBH

 

 

15.75

10.67

15.75

10.67

28.45

23.37

28.45

23.37

41.45

36.07

41.15

36.07

53.85

48.77

66.55

61.47

79.25

74.17

 

 

 

 

1/4

LGH

LBH

 

 

 

19.05

12.70

19.05

12.70

31.75

25.40

31.75

25.40

44.45

38.10

44.45

38.10

57.15

50.80

69.85

63.50

82.55

76.20

95.25

88.90

 

 

5/16

LGH

LBH

 

 

 

 

22.35

15.24

22.35

15.24

35.05

27.94

35.05

27.94

47.75

40.64

60.45

53.34

73.15

66.04

85.85

78.74

98.55

91.44

111.25

104.14

123.95

116.84

3/8

LGH

LBH

 

 

 

 

 

25.40

17.53

25.40

17.53

38.10

30.23

38.10

30.23

50.80

42.93

63.50

55.63

76.20

68.33

88.90

81.03

101.60

93.73

114.30

106.43

7/16

LGH

LBH

 

 

 

 

 

 

28.45

19.56

28.45

19.56

41.15

32.26

53.85

44.96

66.55

57.66

79.25

70.36

91.95

83.06

104.65

95.76

117.35

108.46

1/2

LGH

LBH

 

 

 

 

 

 

25.40

15.75

25.40

15.75

25.40

15.75

44.45

34.54

63.50

53.85

63.50

53.85

82.55

72.64

101.60

91.95

101.60

91.95