Language：CHINESESENGLISH
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
3
3.5
c
max
0.8
min
0.4
da
15.23
19.23
24.32
26.32
28.32
32.84
35.84
ds
12.43
16.43
20.52
22.52
24.52
27.84
30.4
11.57
15.57
19.48
21.48
23.48
26.16
29.16
dw
19.2
24.9
31.4
33.3
38
42.8
46.5
e
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
7.95
10.75
13.4
14.9
15.9
17.9
19.75
7.05
9.25
11.6
13.1
14.1
16.1
17.65
r
1
1.5
s
21
27
34
36
41
46
50
20.16
33
35
40
45
49
b
L nominal
<45
≥45
<55
≥55
<65
≥65
<70
≥70
<75
≥75
<80
≥80
<85
≥85
25
30
55
60
Mechanical behavior:
Grade
Tensile strength
Yield strength σ0.2
Elongation δ5
Shrinking percentage Ψ
σь
Mpa
%
10.9S
1040~1240
940
42
8.8S
830~1030
660
12
Loading force:
Pressed force section mm2
84.3
157
245
303
353
459
561
Pull force KN
87.7~104.5
163~195
255~304
315~376
367~438
477~569
583~696
70.0~86.8
130~162
203~252
251~312
293~364
381~473
466~578
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