计算选型
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六角头螺栓—细杆—B级(GB/T 5784—1986) mm |
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螺纹末端按GB2规定；ds约等于螺纹中径或螺纹大径；凹穴型式由制造者选择，亦可不制出凹穴。 |
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标记示例： 螺纹规格d＝M12、公称长度l＝80mm、性能等级为5.8级、不经表面处理、B级的六角头螺栓的标记： 螺栓 GB 5784 M12×80 |
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螺纹规格 d |
b参考 |
e min |
K |
r min |
s |
x max |
l的范围 |
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l≤125 |
125＜l≤200 |
公称 |
min |
max |
max |
min |
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M3 |
12 |
— |
5.98 |
2 |
1.80 |
2.20 |
0.1 |
5.5 |
5.20 |
1.25 |
20～30 |
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M4 |
14 |
— |
7.50 |
2.8 |
2.60 |
3.00 |
0.2 |
7 |
6.64 |
1.75 |
20～40 |
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M5 |
16 |
— |
8.63 |
3.5 |
3.26 |
3.74 |
0.2 |
8 |
7.64 |
2 |
25～50 |
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M6 |
18 |
— |
10.89 |
4 |
3.76 |
4.24 |
0.25 |
10 |
9.64 |
2.5 |
25～60 |
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M8 |
22 |
28 |
14.20 |
5.3 |
5.06 |
5.54 |
0.4 |
13 |
12.57 |
3.2 |
30～80 |
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M10 |
26 |
32 |
17.59 |
6.4 |
6.11 |
6.69 |
0.4 |
16 |
15.57 |
3.8 |
40～100 |
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M12 |
30 |
36 |
19.85 |
7.5 |
7.21 |
7.79 |
0.6 |
18 |
17.57 |
4.3 |
45～120 |
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(M14) |
34 |
40 |
22.78 |
8.8 |
8.51 |
9.09 |
0.6 |
21 |
20.16 |
5 |
50～140 |
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M16 |
38 |
44 |
26.17 |
10 |
9.71 |
10.29 |
0.6 |
24 |
23.16 |
5 |
55～150 |
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M20 |
46 |
52 |
32.95 |
12.5 |
12.15 |
12.85 |
0.8 |
30 |
29.16 |
6.3 |
65～150 |
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技术条件 |
材料 |
螺纹公差 |
机械性能等级 |
公差产品等级 |
表面处理 |
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钢 |
6g |
5.8、6.8、8.8 |
B级 |
1.不经处理；2.镀锌钝化；3.氧化 |
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不锈钢 |
A2-70 |
不经处理 |
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公称长度l的商品规格系列： mm |
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公称 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
(55) |
60 |
(65) |
70 |
80 |
90 |
100 |
110 |
120 |
130 |
140 |
150 |
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min |
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 |
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max |
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 |
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注：尽可能不采用括号内的规格。 |
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质量 kg |
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螺纹规格 |
M3 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M14 |
M16 |
M20 |
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公称长度/mm |
每1000件钢制品的质量 ≈ |
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20 |
1.28 |
2.45 |
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25 |
1.49 |
2.82 |
4.58 |
7.15 |
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30 |
1.70 |
3.20 |
5.18 |
8.01 |
15.78 |
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35 |
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3.57 |
5.78 |
8.86 |
17.34 |
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40 |
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3.95 |
6.38 |
9.72 |
18.89 |
31.60 |
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45 |
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6.98 |
10.58 |
20.45 |
34.06 |
49.90 |
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50 |
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7.58 |
11.44 |
22.00 |
36.51 |
53.47 |
76.32 |
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55 |
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12.29 |
23.56 |
38.97 |
57.03 |
81.19 |
113.3 |
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60 |
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13.15 |
25.11 |
41.43 |
60.59 |
86.07 |
119.9 |
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65 |
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26.67 |
43.88 |
64.15 |
90.94 |
126.4 |
215.1 |
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70 |
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28.22 |
46.34 |
67.71 |
95.82 |
133.0 |
225.3 |
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80 |
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31.33 |
51.25 |
74.84 |
105.6 |
146.0 |
245.8 |
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90 |
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56.16 |
81.96 |
115.3 |
159.1 |
266.2 |
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100 |
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61.07 |
89.09 |
125.1 |
172.2 |
286.7 |
|
110 |
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96.21 |
134.8 |
185.3 |
307.2 |
|
120 |
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103.3 |
144.6 |
198.4 |
327.7 |
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130 |
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154.3 |
211.5 |
348.2 |
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140 |
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164.1 |
224.5 |
368.6 |
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150 |
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237.6 |
389.1 |
