材质 
1/4
0.531
0.26
0.252
0.344
0.334
0.078
5/16
0.593
0.324
0.315
0.406
0.396
0.078
3/8
0.687
0.68
0.378
0.495
0.483
0.078
7/16
0.781
0.451
0.441
0.557
0.543
0.078
1/2
0.875
0.515
0.504
0.62
0.604
0.078
9/16
0.968
0.579
0.568
0.687
0.667
0.078
5/8
1.062
0.643
0.631
0.785
0.765
0.078
3/4
1.25
0.77
0.757
0.91
0.89
0.078
7/8
1.437
0.897
0.884
1.035
1.015
0.078
1
1.625
1.025
1.01
1.16
1.14
0.078
1-1/8
1.875
1.15
1.135
1.285
1.265
0.078
1-1/4
2.125
1.275
1.26
1.447
1.427
0.094
1-3/8
2.313
1.4
1.385
1.572
1.552
0.094
1-1/2
2.5
1.525
1.51
1.697
1.677
0.094