材质 
1/4
0.27
0.265
0.562
0.557
0.036
5/16
0.333
0.328
0.625
0.62
0.04
3/8
0.395
0.39
0.75
0.745
0.048
7/16
0.458
0.453
0.875
0.875
0.048
1/2
0.52
0.515
1
0.995
0.056
9/16
0.593
0.588
1.125
1.115
0.056
5/8
0.656
0.651
1.25
1.24
0.072
3/4
0.781
0.776
1.5
1.49
0.072
7/8
0.906
0.901
1.625
1.615
0.072
1
1.031
1.026
1.875
1.865
0.072
1-1/8
1.156
1.151
2.125
2.115
0.092
1-1/4
1.281
1.276
2.375
2.355
0.116
1-3/8
1.406
1.401
2.625
2.605
--
1-1/2
1.531
1.526
2.875
2.855
--
1-3/4
1.781
1.776
3.375
3.345
--
2
2.031
2.026
3.625
3.595
--