开槽沉头螺钉(GB/T 68—2016)
开槽沉头螺钉(GB/T 68—2016)
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开槽沉头螺钉(GB/T 68—2016) mm |
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标记示例： 螺纹规格d＝M5、公称长度l＝20mm、性能等级为4.8级、不经表面处理的A级开槽沉头螺钉的标记： 螺钉 GB/T 68 M5×20 |
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螺纹规格 d |
螺距 P |
a |
b |
dk |
k |
n |
r max |
t |
x max |
l的范围 |
全螺纹 长度l |
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max |
min |
理论值 |
实际值 |
公称＝max |
公称 |
max |
min |
max |
min |
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max |
公称＝max |
min |
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M1.6 |
0.35 |
0.7 |
25 |
3.6 |
3.0 |
2.7 |
1 |
0.4 |
0.60 |
0.46 |
0.4 |
0.50 |
0.32 |
0.9 |
2.5～16 |
2.5～30 |
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M2 |
0.4 |
0.8 |
25 |
4.4 |
3.8 |
3.5 |
1.2 |
0.5 |
0.70 |
0.56 |
0.5 |
0.6 |
0.4 |
1 |
3～20 |
3～30 |
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M2.5 |
0.45 |
0.9 |
25 |
5.5 |
4.7 |
4.4 |
1.5 |
0.6 |
0.80 |
0.66 |
0.6 |
0.75 |
0.50 |
1.1 |
4～25 |
4～30 |
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M3 |
0.5 |
1 |
25 |
6.3 |
5.5 |
5.2 |
1.65 |
0.8 |
1.00 |
0.86 |
0.8 |
0.85 |
0.60 |
1.25 |
5～30 |
5～30 |
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(M3.5) |
0.6 |
1.2 |
38 |
8.2 |
7.30 |
6.94 |
2.35 |
1 |
1.20 |
1.06 |
0.9 |
1.2 |
0.9 |
1.5 |
6～35 |
6～45 |
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M4 |
0.7 |
1.4 |
38 |
9.4 |
8.40 |
8.04 |
2.7 |
1.2 |
1.51 |
1.26 |
1 |
1.3 |
1.0 |
1.75 |
6～40 |
6～45 |
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M5 |
0.8 |
1.6 |
38 |
10.4 |
9.30 |
8.94 |
2.7 |
1.2 |
1.51 |
1.26 |
1.3 |
1.4 |
1.1 |
2 |
8～50 |
8～45 |
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M6 |
1 |
2 |
38 |
12.6 |
11.30 |
10.87 |
3.3 |
1.6 |
1.91 |
1.66 |
1.5 |
1.6 |
1.2 |
2.5 |
8～60 |
8～45 |
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M8 |
1.25 |
2.5 |
38 |
17.3 |
15.80 |
15.37 |
4.65 |
2 |
2.31 |
2.06 |
2 |
2.3 |
1.8 |
3.2 |
10～80 |
10～45 |
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M10 |
1.5 |
3 |
38 |
20 |
18.30 |
17.78 |
5 |
2.5 |
2.81 |
2.56 |
2.5 |
2.6 |
2.0 |
3.8 |
12～80 |
12～45 |
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技术条件 |
材料 |
螺纹公差 |
机械性能等级 |
产品公差等级 |
表面处理 |
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钢 |
6g |
4.8、5.8 |
A |
不经处理 |
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不锈钢 |
A2-50、A2-70 |
简单处理 |
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有色金属 |
CU2、CU3、AL4 |
简单处理 |
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公称长度l的商品规格系列： mm |
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公称 |
2.5 |
3 |
4 |
5 |
6 |
8 |
10 |
12 |
(14) |
16 |
20 |
25 |
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min |
2.3 |
2.8 |
3.76 |
4.76 |
5.76 |
7.71 |
9.71 |
11.65 |
13.65 |
15.65 |
19.58 |
24.58 |
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max |
2.7 |
3.2 |
4.24 |
5.24 |
6.24 |
8.29 |
10.29 |
12.35 |
14.35 |
16.35 |
20.42 |
25.42 |
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公称 |
30 |
35 |
40 |
45 |
50 |
(55) |
60 |
(65) |
70 |
(75) |
80 |
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min |
29.58 |
34.5 |
39.5 |
44.5 |
49.5 |
54.05 |
59.05 |
64.05 |
69.05 |
74.05 |
79.05 |
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max |
30.42 |
35.5 |
40.5 |
45.5 |
50.5 |
55.95 |
60.95 |
65.95 |
70.95 |
75.95 |
80.95 |
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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 |
M1.6 |
M2 |
M2.5 |
M3 |
M3.5 |
M4 |
M5 |
M6 |
M8 |
M10 |
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公称长度/mm |
每1000件钢制品的质量≈ |
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2.5 |
0.053 |
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3 |
0.058 |
0.101 |
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4 |
0.069 |
0.119 |
0.206 |
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5 |
0.081 |
0.137 |
0.236 |
0.335 |
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6 |
0.093 |
0.152 |
0.266 |
0.379 |
0.633 |
0.903 |
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8 |
0.116 |
0.193 |
0.326 |
0.467 |
0.753 |
1.06 |
1.48 |
2.38 |
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10 |
0.139 |
0.231 |
0.386 |
0.555 |
0.873 |
1.22 |
1.72 |
2.73 |
5.68 |
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12 |
0.162 |
0.268 |
0.446 |
0.643 |
0.993 |
1.37 |
1.96 |
3.08 |
6.32 |
9.54 |
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14 |
0.185 |
0.306 |
0.507 |
0.731 |
1.11 |
1.53 |
2.20 |
3.43 |
6.96 |
10.6 |
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16 |
0.208 |
0.343 |
0.567 |
0.820 |
1.23 |
1.68 |
2.44 |
3.78 |
7.60 |
11.6 |
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20 |
|
0.417 |
0.687 |
0.996 |
1.47 |
2.00 |
2.92 |
4.48 |
8.88 |
13.6 |
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25 |
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0.838 |
1.22 |
1.77 |
2.39 |
3.52 |
5.36 |
10.5 |
16.1 |
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30 |
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1.44 |
2.07 |
2.78 |
4.12 |
6.23 |
12.1 |
18.7 |
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35 |
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2.37 |
3.17 |
4.72 |
7.11 |
13.7 |
21.2 |
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40 |
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3.56 |
5.32 |
7.98 |
15.3 |
23.7 |
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45 |
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5.92 |
8.86 |
16.9 |
26.2 |
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50 |
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6.52 |
9.73 |
18.5 |
28.8 |
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55 |
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10.6 |
20.1 |
31.3 |
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60 |
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11.5 |
21.7 |
33.8 |
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65 |
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23.3 |
36.3 |
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70 |
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24.9 |
38.9 |
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75 |
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26.5 |
41.4 |
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80 |
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28.1 |
43.9 |
