计算选型
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塑料滚花头螺钉(GB/T 840—1988) mm |
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末端按GB2规定 |
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标记示例： 螺纹规格d＝M10、公称长度l＝30mm、性能等级为14H级、表面氧化、按A型制造的塑料滚花头螺钉的标记： 螺钉 GB 840 M10×30 按B型制造时应加标记B： 螺钉 GB 840 BM10×30 |
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螺纹规格 d |
dk |
K |
dp |
z |
R ≈ |
l的范围 |
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max |
min |
max |
min |
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M4 |
12 |
5 |
2.5 |
2.25 |
2.25 |
2 |
25 |
8～30 |
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M5 |
16 |
6 |
3.5 |
3.2 |
2.75 |
2.5 |
32 |
10～40 |
|
M6 |
20 |
6 |
4 |
3.7 |
3.25 |
3 |
40 |
12～40 |
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M8 |
25 |
8 |
5.5 |
5.2 |
4.3 |
4 |
50 |
16～45 |
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M10 |
28 |
8 |
7 |
6.64 |
5.3 |
5 |
55 |
20～60 |
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M12 |
32 |
10 |
8.5 |
8.14 |
6.3 |
6 |
65 |
25～60 |
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M16 |
40 |
12 |
12 |
11.57 |
8.36 |
8 |
80 |
30～80 |
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技术条件 |
材料 |
螺纹公差 |
机械性能等级 |
表面处理 |
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头部 |
ABS塑料或供需双方协议 |
6g |
A型：14H；B型：33H |
1.氧化；2.镀锌钝化 |
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杆部 |
钢 |
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公称长度l的商品规格系列： mm |
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公称 |
8 |
10 |
12 |
16 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
60 |
70 |
80 |
|
min |
7.71 |
9.71 |
11.65 |
15.65 |
19.58 |
24.58 |
29.58 |
34.50 |
39.50 |
44.50 |
49.50 |
59.05 |
69.05 |
79.05 |
|
max |
8.29 |
10.29 |
12.35 |
16.35 |
20.42 |
25.42 |
30.42 |
35.50 |
40.50 |
45.50 |
50.50 |
60.95 |
70.95 |
80.95 |
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质量 kg |
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螺纹规格 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M16 |
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公称长度/mm |
每1000件钢制品的质量 ≈ |
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|
8 |
1.41 |
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|
|
|
|
|
|
10 |
1.56 |
2.89 |
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12 |
1.71 |
3.13 |
4.64 |
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16 |
2.01 |
3.61 |
5.33 |
10.54 |
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|
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20 |
2.31 |
4.09 |
6.02 |
11.78 |
17.21 |
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|
|
25 |
2.68 |
4.69 |
6.87 |
13.34 |
19.66 |
30.22 |
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30 |
3.06 |
5.29 |
7.73 |
14.89 |
22.12 |
33.78 |
63.69 |
|
35 |
|
5.89 |
8.59 |
16.45 |
24.57 |
37.34 |
70.24 |
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40 |
|
6.49 |
9.45 |
18.00 |
27.03 |
40.91 |
76.78 |
|
45 |
|
|
|
19.56 |
29.49 |
44.47 |
83.32 |
|
50 |
|
|
|
|
31.94 |
48.03 |
89.86 |
|
60 |
|
|
|
|
36.85 |
55.15 |
103.0 |
|
70 |
|
|
|
|
|
|
116.0 |
|
80 |
|
|
|
|
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129.1 |
