材质 
1/4
20
0.4375
0.428
0.505
0.488
0.226
0.212
0.016
5/16
18
0.5
0.489
0.577
0.557
0.273
0.258
0.016
3/8
16
0.5625
0.551
0.65
0.628
0.337
0.32
0.016
7/16
14
0.6875
0.675
0.794
0.768
0.385
0.365
0.016
1/2
13
0.75
0.736
0.866
0.84
0.448
0.427
0.016
9/16
12
0.875
0.861
1.01
0.982
0.496
0.473
0.016
5/8
11
0.9375
0.922
1.083
1.051
0.559
0.535
0.016
3/4
10
1.125
1.088
1.299
1.24
0.665
0.617
0.016
7/8
9
1.3125
1.269
1.516
1.447
0.776
0.724
0.016
1
8
1.5
1.45
1.732
1.653
0.887
0.831
0.016
1-1/8
8
1.6875
1.631
1.949
1.859
0.999
0.939
0.016
1-1/4
8
1.875
1.812
2.165
2.066
1.094
1.03
0.016
1-3/8
8
2.0625
1.994
2.382
2.273
1.206
1.138
0.016
1-1/2
8
2.25
2.175
2.598
2.48
1.317
1.245
0.016
1-3/4
8
2.625
2.538
3.031
2.893
1.54
1.45
0.016
2
8
3
2.9
3.464
3.306
1.763
1.675
0.016
2-1/4
8
3.75
3.262
3.897
3.719
1.97
1.874
0.016
2-1/2
8
3.75
3.625
4.33
4.133
2.193
2.089
0.016
2-3/4
8
4.125
3.988
4.763
4.546
2.415
2.303
0.016
3
8
4.5
4.35
5.196
4.959
2.638
2.518
0.016