六角法兰面螺栓—加大系列—B级(摘自GB/T 5789-86)
螺纹规格为M5~M20、对边宽度为加大系列、B级的六角法兰面螺栓。
标记示例:
螺纹规格d=M12、公称长度l=M80mm、性能等级为8.8级、表面氧化、A或B型的六角法兰面螺栓的标记:
螺栓 GB/T 5789 12×80
螺纹规格d=M12、公称长度l=M80mm、性能等级为8.8级、表面氧化、A型的六角法兰面螺栓的标记:
螺栓 GB/T 5789 AM12×80
螺纹规格为M5~M20的六角法兰面螺栓:
螺纹规格
d
|
b
参考
|
c
|
da
max
|
dc
max
|
ds
|
du
max
|
dw
min
|
e
min
|
f
max
|
K
max
|
K′
min
|
r1
min
|
r2
max
|
r3
min
|
r4
参考
|
s
|
t
|
ls
min
|
ls
max
|
l
|
l≤125
|
125<l≤125
|
min
|
A型
|
B型
|
max
|
min
|
max
|
min
|
max
|
min
|
M5
|
16
|
—
|
1
|
5.7
|
6.2
|
11.8
|
5
|
4.82
|
5.5
|
9.8
|
8.56
|
1.4
|
5.4
|
2
|
0.25
|
0.3
|
0.1
|
3
|
8
|
7.64
|
0.15
|
0.05
|
5~30
|
2.4~34
|
10~50
|
M6
|
18
|
—
|
1.1
|
6.8
|
7.4
|
14.2
|
6
|
5.82
|
6.6
|
12.2
|
10.8
|
2
|
6.6
|
2.5
|
0.4
|
0.4
|
0.1
|
3.4
|
10
|
9.64
|
0.2
|
0.05
|
7~37
|
3~42
|
12~60
|
M8
|
22
|
28
|
1.2
|
9.2
|
10
|
18
|
8
|
7.78
|
9
|
15.8
|
14.08
|
2
|
8.1
|
3.2
|
0.4
|
0.5
|
0.15
|
4.3
|
13
|
12.57
|
0.25
|
0.1
|
6.75~51.75
|
4~58
|
16~80
|
M10
|
26
|
32
|
1.5
|
11.2
|
12.6
|
22.3
|
10
|
9.78
|
11
|
19.6
|
16.32
|
2
|
9.2
|
3.6
|
0.4
|
0.6
|
0.2
|
4.3
|
15
|
14.57
|
0.3
|
0.15
|
6.5~66.5
|
4.5~74
|
20~100
|
M12
|
30
|
36
|
1.8
|
13.7
|
15.2
|
26.6
|
12
|
11.73
|
13.5
|
23.8
|
19.68
|
3
|
10.4
|
4.6
|
0.6
|
0.7
|
0.25
|
6.4
|
18
|
17.57
|
0.35
|
0.15
|
6.25~81.25
|
5.3~90
|
25~120
|
(M14)
|
34
|
40
|
2.1
|
15.7
|
17.7
|
30.5
|
14
|
13.73
|
15.5
|
27.6
|
22.58
|
3
|
12.4
|
5.5
|
0.6
|
0.9
|
0.3
|
6.4
|
21
|
20.16
|
0.45
|
0.2
|
11~90
|
6~100
|
30~140
|
M16
|
38
|
44
|
2.4
|
17.7
|
20.7
|
35
|
16
|
15.73
|
17.5
|
31.9
|
25.94
|
3
|
14.1
|
6.2
|
0.6
|
1
|
0.35
|
6.4
|
24
|
23.16
|
0.5
|
0.25
|
12~106
|
6~116
|
35~160
|
M20
|
46
|
52
|
3
|
22.4
|
25.7
|
43
|
20
|
19.67
|
22
|
39.9
|
32.66
|
4
|
17.7
|
7.9
|
0.8
|
1.2
|
0.4
|
8.5
|
30
|
29.16
|
0.65
|
0.3
|
11.5~135.5
|
7.5~148
|
40~200
|
注:尽可能不采用括号内的规格。
l的范围:
公称
|
10
|
12
|
16
|
20
|
25
|
30
|
35
|
40
|
45
|
50
|
(55)
|
60
|
(65)
|
70
|
80
|
90
|
100
|
110
|
120
|
130
|
140
|
150
|
160
|
180
|
200
|
min
|
9.3
|
11.1
|
15.1
|
18.9
|
23.9
|
28.9
|
33.7
|
38.7
|
43.7
|
48.7
|
53.5
|
58.5
|
63.5
|
68.5
|
78.5
|
88.3
|
98.3
|
108.3
|
118.3
|
128
|
138
|
148
|
158
|
178
|
197.7
|
max
|
10.7
|
12.9
|
16.9
|
21.1
|
26.1
|
31.1
|
36.3
|
41.3
|
46.3
|
51.3
|
56.5
|
61.5
|
66.5
|
71.5
|
81.5
|
91.7
|
101.7
|
111.7
|
121.7
|
132
|
142
|
152
|
162
|
182
|
202.3
|