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4大六角高強度螺栓
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大六角高強度螺栓






Function: High strength bolt belongs to a kind of standard parts. After first tight and end tight construction, it is generally used for permanent connection.
Application: Application on the steel structure engineering, steel structure steel plate used to connect to the join points.

GB/T1228 Steel structure has high strength large hexagon head bolts type Size

 

Thread specifications-d

M12

M16

M20

M22

M24

M27

M30

Screw pitch P

1.75

2

2.5

2.5

3

3

3.5

c

max

0.8

0.8

0.8

0.8

0.8

0.8

0.8

min

0.4

0.4

0.4

0.4

0.4

0.4

0.4

da

max

15.23

19.23

24.32

26.32

28.32

32.84

35.84

ds

max

12.43

16.43

20.52

22.52

24.52

27.84

30.4

min

11.57

15.57

19.48

21.48

23.48

26.16

29.16

dw

min

19.2

24.9

31.4

33.3

38

42.8

46.5

e

min

22.78

59.56

37.29

39.55

45.2

50.85

55.37

k

nominal

7.5

10

12.5

14

15

17

18.7

max

7.95

10.75

13.4

14.9

15.9

17.9

19.75

min

7.05

9.25

11.6

13.1

14.1

16.1

17.65

r

min

1

1

1.5

1.5

1.5

2

2

s

max

21

27

34

36

41

46

50

min

20.16

26.16

33

35

40

45

49

b

L nominal

<45

≥45

<55

≥55

<65

≥65

<70

≥70

<75

≥75

<80

≥80

<85

≥85

nominal

25

30

30

35

35

40

40

45

45

50

50

55

55

60


Mechanical behavior:

Grade

Tensile strength

Yield strength σ0.2

Elongation δ5

Shrinking percentage Ψ

σь

Mpa

%

%

Mpa

min

10.9S

1040~1240

940

10

42

8.8S

830~1030

660

12

45


Loading force:

 

Thread specifications-d

M12

M16

M20

M22

M24

M27

M30

Pressed force section   mm2

84.3

157

245

303

353

459

561

Pull force KN

10.9S

87.7~104.5

163~195

255~304

315~376

367~438

477~569

583~696

8.8S

70.0~86.8

130~162

203~252

251~312

293~364

381~473

466~578