材质 
1/4
20
0.5
0.488
0.577
0.556
0.25
0.218
0.015
5/16
18
0.5625
0.546
0.65
0.622
0.314
0.28
0.015
3/8
16
0.6876
0.669
0.794
0.763
0.377
0.341
0.015
7/16
14
0.75
0.728
0.866
0.830
0.441
0.403
0.015
1/2
13
0.875
0.85
1.01
0.969
0.504
0.464
0.015
9/16
12
0.9375
0.909
1.083
1.037
0.568
0.526
0.015
5/8
11
1.0625
1.031
1.227
1.175
0.631
0.587
0.015
3/4
10
1.25
1.212
1.443
1.382
0.758
0.71
0.015
7/8
9
1.4375
1.394
1.66
1.589
0.885
0.833
0.015
1
8
1.625
1.575
1.876
1.796
1.012
0.956
0.015
1-1/8
8
1.8125
1.756
2.093
2.002
1.139
1.079
0.015
1-1/4
8
2
1.938
2.309
2.209
1.251
1.187
0.015
1-3/8
8
2.1875
2.119
2.526
2.416
1.378
1.31
0.015
1-1/2
8
2.375
2.3
2.742
2.622
1.505
1.433
0.015
1-3/4
8
2.75
2.662
3.175
3.035
1.759
1.679
0.015
2
8
3.125
3.025
3.608
3.449
2.013
1.925
0.015
2-1/4
8
3.5
3.338
4.041
3.862
2.251
2.155
0.015
2-1/2
8
3.875
3.75
4.474
4.275
2.505
2.401
0.015
2-3/4
8
4.25
4.112
4.907
4.688
2.759
2.647
0.015
3
8
4.625
4.475
5.34
5.102
3.013
2.893
0.015