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 | |||||||||||
螺纹规格 d | 螺距 P | b(参考) | dk | ds | e min | f | |||||
l≤120 | 130≤l≤200 | l>200 | max=公称 | min | max | min | max | min | |||
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 | | ||||||
max | min | max | min | ||||||||
M5 | 3.1 | 2.5 | 0.4 | 5.48 | 4.52 | 20~50 | |||||
M6 | 3.6 | 3 | 0.5 | 6.48 | 5.52 | 30~60 | |||||
M8 | 4.8 | 4 | 0.8 | 8.58 | 7.42 | 40~80 | |||||
M10 | 5.8 | 5 | 0.8 | 10.58 | 9.42 | 45~100 | |||||
M12 | 6.8 | 6 | 1.2 | 12.7 | 11.3 | 55~120 | |||||
M16 | 8.9 | 8 | 1.2 | 16.7 | 15.3 | 65~200 | |||||
M20 | 10.9 | 10 | 1.6 | 20.84 | 19.16 | 75~200 | |||||
技术条件 | 材料 | 螺纹公差 | 机械性能等级 | 产品等级 | 表面处理 | ||||||
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 | ||||||||||||
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 | |||||||
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≈ | ||||||
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 |

