大半圆头方颈螺栓 C级(GB/T 14—2013)
大半圆头方颈螺栓 C级(GB/T 14—2013)
大半圆头方颈螺栓 C级(GB/T 14—2013) mm |
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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4.8级、不经表面处理的大半圆头方颈螺栓的标记: 螺栓 GB/T 14 M12×80 |
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螺纹规格 d |
螺距 P |
b(参考) |
dk |
ds |
e min |
f |
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l≤120 |
130≤l≤200 |
l>200 |
max=公称 |
min |
max |
min |
max |
min |
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M5 |
0.8 |
16 |
— |
— |
13 |
11.9 |
5.48 |
≈ 螺纹中径 |
5.9 |
4.1 |
2.9 |
M6 |
1 |
18 |
— |
— |
16 |
14.9 |
6.48 |
7.2 |
4.6 |
3.4 |
|
M8 |
1.25 |
22 |
28 |
— |
20 |
18.7 |
8.58 |
9.6 |
5.6 |
4.4 |
|
M10 |
1.5 |
26 |
32 |
— |
24 |
22.7 |
10.58 |
12.2 |
6.6 |
5.4 |
|
M12 |
1.75 |
30 |
36 |
— |
30 |
28.7 |
12.7 |
14.7 |
8.8 |
7.2 |
|
M16 |
2 |
38 |
44 |
57 |
38 |
36.4 |
16.7 |
19.9 |
12.9 |
11.1 |
|
M20 |
2.5 |
46 |
52 |
65 |
46 |
44.4 |
20.84 |
24.9 |
15.9 |
14.1 |
|
螺纹规格 d |
K |
r max |
υ |
l的范围 |
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max |
min |
max |
min |
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M5 |
3.1 |
2.5 |
0.4 |
5.48 |
4.52 |
20~50 |
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M6 |
3.6 |
3 |
0.5 |
6.48 |
5.52 |
30~60 |
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M8 |
4.8 |
4 |
0.8 |
8.58 |
7.42 |
40~80 |
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M10 |
5.8 |
5 |
0.8 |
10.58 |
9.42 |
45~100 |
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M12 |
6.8 |
6 |
1.2 |
12.7 |
11.3 |
55~120 |
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M16 |
8.9 |
8 |
1.2 |
16.7 |
15.3 |
65~200 |
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M20 |
10.9 |
10 |
1.6 |
20.84 |
19.16 |
75~200 |
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技术条件 |
材料 |
螺纹公差 |
机械性能等级 |
产品等级 |
表面处理 |
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钢 |
8.8级为6g;其余为8g |
4.6、4.8、8.8 |
C级 |
1.不经处理;2.8.8级,氧化(热的或化学的); 3.镀锌钝化;4.热镀锌 |
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 |
75 |
min |
19 |
24 |
29 |
33.7 |
38.7 |
43.7 |
48.7 |
53.5 |
58.5 |
63.5 |
68.5 |
73.5 |
max |
21 |
26 |
31 |
36.3 |
41.3 |
46.3 |
51.3 |
56.5 |
61.5 |
66.5 |
71.5 |
76.5 |
公称 |
80 |
90 |
100 |
110 |
120 |
130 |
140 |
150 |
160 |
180 |
200 |
|
min |
78.5 |
88.3 |
98.3 |
108.3 |
118.3 |
128 |
138 |
148 |
156 |
176 |
195.4 |
|
max |
81.5 |
91.7 |
101.7 |
111.7 |
121.7 |
132 |
142 |
152 |
164 |
184 |
204.6 |
|
注:1.公称长度l≤75mm和规格d≤M12的螺栓,允许制出全螺纹。 2.公称长度在200mm以上,应采用按20mm递增的尺寸。 |
质量 kg |
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螺纹规格 |
M5 |
M6 |
M8 |
M10 |
M12 |
M16 |
M20 |
公称长度/mm |
每1000件钢制品的质量≈ |
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20 |
3.90 |
|
|
|
|
|
|
25 |
4.50 |
|
|
|
|
|
|
30 |
5.11 |
7.88 |
|
|
|
|
|
35 |
5.71 |
8.74 |
|
|
|
|
|
40 |
6.32 |
9.61 |
18.12 |
|
|
|
|
45 |
6.92 |
10.47 |
19.68 |
32.52 |
|
|
|
50 |
7.53 |
11.33 |
21.23 |
34.98 |
|
|
|
55 |
|
12.19 |
22.79 |
37.43 |
58.65 |
|
|
60 |
|
13.06 |
24.34 |
39.89 |
62.21 |
|
|
65 |
|
|
25.90 |
42.34 |
65.77 |
128.3 |
|
70 |
|
|
27.45 |
44.80 |
69.33 |
134.8 |
|
75 |
|
|
29.01 |
47.25 |
72.90 |
141.4 |
234.0 |
80 |
|
|
30.56 |
49.71 |
76.46 |
147.9 |
244.2 |
90 |
|
|
|
54.62 |
83.58 |
161.0 |
264.7 |
100 |
|
|
|
59.53 |
90.71 |
174.1 |
285.2 |
110 |
|
|
|
|
97.83 |
187.2 |
305.7 |
120 |
|
|
|
|
105.0 |
200.2 |
326.1 |
130 |
|
|
|
|
|
213.3 |
346.6 |
140 |
|
|
|
|
|
226.4 |
367.1 |
150 |
|
|
|
|
|
239.5 |
387.6 |
160 |
|
|
|
|
|
252.6 |
408.0 |
180 |
|
|
|
|
|
278.8 |
449.0 |
200 |
|
|
|
|
|
304.9 |
490.0 |