DIN 2510

DIN 2510 Bolting components and connections with expansion shank are suitable for use at elevated temperatures with high pressure and with optimum Charpy Notch Impact strength for cryogenic applications. Screw connections with reduced shank in DIN 2510 standard are primarily used in situations where bias voltage is applied and where durability of screw connections has to be extensively secured under varying mechanical and thermal stress environments. DIN 2510 Reduced Shank Bolts show good durability when combined with high temperature resistant material in accordance with EN 10269-specification material. The bias drop is quite low and hence it contributes significantly to the loosening of the screw connections during working operation by creep factors of the material, settling in the force-transmitting surfaces of the connection and the strained parts, and by bending the threads.

DIN 2510 Design

When designing expansion bolts and expansion bolts, the following points should be noted:

a)   The minimum expansion shaft length should be Double or four times the thread diameter, in order to obtain sufficient elasticity.
b)   The ratio of thread core diameter to shank diameter should be about 1:1 in view of the load capacity and elasticity of the screw.
c)   The transition angle between the expansion shaft and the thread should be relatively small. This results in a favourable flow of force and a better load distribution in the screwed thread.

DIMENSION STANDARD OF REDUCED SHANK STUD BOLT AS PER DIN 2510 (Metric Size)

d1

d2

d3

d7

FORM L

FORM K / KU

FORM Z / ZU

r

SW

z1 max

z2

FORM KU

FORM ZU

b1

z

M12

8,5

8

8

20

13

27

10

7

1,75

4

11

7

M16

12

12

12

23

16

31

10

10

2

5

14

8

M20

15

14

13

28

20

36

10

11

2,5

6

16

9

M24

18

14

16

32

24

42

16

11

3

6

17

8

M27

20,5

18

18

35

27

47

16

13

3

6

19

10

M30

23

18

21

39

30

50

16

13

3,5

6

19

12

M33

25,5

25

24

42

33

53

16

22

3,5

9

21

14

M36

27,5

25

26

45

36

57

20

22

4

9

23

14

M39

30,5

28

30

48

39

60

20

24

4

10

23

14

M42

32,5

28

32

52

42

64

20

24

4,5

10

24

15

M45

35,5

32

34

55

45

66

20

27

4,5

11

25

15

M48

37,5

32

37

58

48

70

20

27

5

11

26

19

M52

41

36

40

62

52

74

20

30

5

12

26

18

M56

44

40

45

56

79

25

32

5,5

13

28

19

M64

51

42

52

64

88

25

36

6

14

28

20

M72x6

58,5

50

56

72

95

25

41

6

15

28

20

Note :
FORM L - Long thread, FORM K - Short thread, FORM KU - Short thread, FORM Z - Long thread, FORM ZU - Long thread