开槽半沉头螺钉(GB/T 69—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级开槽半沉头螺钉的标记: 螺钉 GB/T 69 M5×20 |
螺纹 规格 d | 螺距 P | a | b | dk | f ≈ | k | n | r max | rf ≈ | t | x max | l的范围 | 全螺纹 长度l | |||||
max | min | 理论值 | 实际值 | 公称=max | 公称 | max | min | max | min | |||||||||
max | 公称=max | min | ||||||||||||||||
M1.6 | 0.35 | 0.7 | 25 | 3.6 | 3.0 | 2.7 | 0.4 | 1 | 0.4 | 0.60 | 0.46 | 0.4 | 3 | 0.80 | 0.64 | 0.9 | 2.5~16 | 2.5~30 |
M2 | 0.4 | 0.8 | 25 | 4.4 | 3.8 | 3.5 | 0.5 | 1.2 | 0.5 | 0.70 | 0.56 | 0.5 | 4 | 1.0 | 0.8 | 1 | 3~20 | 3~30 |
M2.5 | 0.45 | 0.9 | 25 | 5.5 | 4.7 | 4.4 | 0.6 | 1.5 | 0.6 | 0.80 | 0.66 | 0.6 | 5 | 1.2 | 1.0 | 1.1 | 4~25 | 4~30 |
M3 | 0.5 | 1 | 25 | 6.3 | 5.5 | 5.2 | 0.7 | 1.65 | 0.8 | 1.00 | 0.86 | 0.8 | 6 | 1.45 | 1.20 | 1.25 | 5~30 | 5~30 |
(M3.5) | 0.6 | 1.2 | 38 | 8.2 | 7.30 | 6.94 | 0.8 | 2.35 | 1 | 1.20 | 1.06 | 0.9 | 8.5 | 1.7 | 1.4 | 1.5 | 6~35 | 6~45 |
M4 | 0.7 | 1.4 | 38 | 9.4 | 8.40 | 8.04 | 1 | 2.7 | 1.2 | 1.51 | 1.26 | 1 | 9.5 | 1.9 | 1.6 | 1.75 | 6~40 | 6~45 |
M5 | 0.8 | 1.6 | 38 | 10.4 | 9.30 | 8.94 | 1.2 | 2.7 | 1.2 | 1.51 | 1.26 | 1.3 | 9.5 | 2.4 | 2.0 | 2 | 8~50 | 8~45 |
M6 | 1 | 2 | 38 | 12.6 | 11.30 | 10.87 | 1.4 | 3.3 | 1.6 | 1.91 | 1.66 | 1.5 | 12 | 2.8 | 2.4 | 2.5 | 8~60 | 8~45 |
M8 | 1.25 | 2.5 | 38 | 17.3 | 15.80 | 15.37 | 2 | 4.65 | 2 | 2.31 | 2.06 | 2 | 16.5 | 3.7 | 3.2 | 3.2 | 10~80 | 10~45 |
M10 | 1.5 | 3 | 38 | 20 | 18.30 | 17.78 | 2.3 | 5 | 2.5 | 2.81 | 2.56 | 2.5 | 19.5 | 4.4 | 3.8 | 3.8 | 12~80 | 12~45 |
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 | |||||||||||||
钢 | 6g | 4.8、5.8 | A | 不经处理 | ||||||||||||||
不锈钢 | A2-50、A2-70 | 简单处理 | ||||||||||||||||
有色金属 | CU2、CU3、AL4 | 简单处理 | ||||||||||||||||
公称长度l的商品规格系列: mm | ||||||||||||
公称 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | (14) | 16 | 20 | 25 |
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 |
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 |
公称 | 30 | 35 | 40 | 45 | 50 | (55) | 60 | (65) | 70 | (75) | 80 | |
min | 29.58 | 34.5 | 39.5 | 44.5 | 49.5 | 54.05 | 59.05 | 64.05 | 69.05 | 74.05 | 79.05 | |
max | 30.42 | 35.5 | 40.5 | 45.5 | 50.5 | 55.95 | 60.95 | 65.95 | 70.95 | 75.95 | 80.95 | |
注:尽可能不采用括号内的规格。 | ||||||||||||
质量 kg | ||||||||||
螺纹规格 | M1.6 | M2 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 |
公称长度/mm | 每1000件钢制品的质量≈ | |||||||||
2.5 | 0.062 | | | | | | | | | |
3 | 0.067 | 0.119 | | | | | | | | |
4 | 0.078 | 0.138 | 0.242 | | | | | | | |
5 | 0.090 | 0.156 | 0.272 | 0.395 | | | | | | |
6 | 0.102 | 0.175 | 0.302 | 0.439 | 0.729 | 1.07 | | | | |
8 | 0.125 | 0.212 | 0.362 | 0.527 | 0.849 | 1.23 | 1.73 | 2.79 | | |
10 | 0.145 | 0.249 | 0.422 | 0.615 | 0.969 | 1.39 | 1.97 | 3.14 | 6.89 | |
12 | 0.165 | 0.287 | 0.482 | 0.703 | 1.09 | 1.54 | 2.21 | 3.49 | 7.53 | 11.4 |
14 | 0.185 | 0.325 | 0.543 | 0.791 | 1.21 | 1.70 | 2.45 | 3.84 | 8.17 | 12.5 |
16 | 0.205 | 0.362 | 0.603 | 0.879 | 1.33 | 1.85 | 2.69 | 4.19 | 8.81 | 13.5 |
20 | | 0.436 | 0.723 | 1.06 | 1.57 | 2.17 | 3.17 | 4.89 | 10.1 | 15.5 |
25 | | | 0.874 | 1.28 | 1.87 | 2.56 | 3.77 | 5.77 | 11.7 | 18.0 |
30 | | | | 1.50 | 2.17 | 2.95 | 4.37 | 6.64 | 13.3 | 20.6 |
35 | | | | | 2.47 | 3.34 | 4.97 | 7.52 | 14.9 | 23.1 |
40 | | | | | | 3.73 | 5.57 | 8.39 | 16.5 | 25.6 |
45 | | | | | | | 6.16 | 9.27 | 18.1 | 28.1 |
50 | | | | | | | 6.76 | 10.1 | 19.7 | 30.7 |
55 | | | | | | | | 11.0 | 21.3 | 33.2 |
60 | | | | | | | | 11.9 | 22.9 | 35.7 |
65 | | | | | | | | | 24.5 | 38.2 |
70 | | | | | | | | | 26.1 | 40.8 |
75 | | | | | | | | | 27.7 | 43.3 |
80 | | | | | | | | | 29.3 | 45.8 |

