螺纹孔底孔
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标准粗牙螺纹底孔表
序号 螺纹 底孔直径 螺距 上偏差 下偏差
1 M6 4.917 1 +0.236 +0.026
2 M7 5.917 1 +0.236 +0.026
3 M8 6.647 1.25 +0.265 +0.028
4 M9 7.647 1.25 +0.265 +0.028
5 M10 8.376 1.5 +0.300 +0.032
6 M11 9.376 1.5 +0.300 +0.032
7 M12 10.106 1.75 +0.335 +0.034
8 M14 11.835 2 +0.375 +0.038
9 M16 13.835 2 +0.375 +0.038
10 M18 15.294 2.5 +0.450 +0.042
11 M20 17.294 2.5 +0.450 +0.042
12 M22 19.294 2.5 +0.450 +0.042
13 M24 20.752 3 +0.500 +0.048
14 M27 23.752 3 +0.500 +0.048
15 M30 26.211 3.5 +0.560 +0.053
16 M33 29.211 3.5 +0.560 +0.053
17 M36 31.670 4 +0.600 +0.060
18 M39 34.670 4 +0.600 +0.060
19 M42 37.129 4.5 +0.670 +0.063
20 M45 40.129 4.5 +0.670 +0.063
21 M48 42.587 5 +0.710 +0.071
22 M52 46.587 5 +0.710 +0.071
23 M56 50.046 5.5 +0.750 +0.075
24 M60 54.046 5.5 +0.750 +0.075
26 M64 57.505 6 +0.800 +0.080
27 M68 61.505 6 +0.800 +0.080