材质 
1/4
20|28|32
0.25
0.245
0.375
0.367
0.433
0.409
0.56
0.28
5/16
18|24|32
0.3125
0.3065
0.5
0.489
0.577
0.548
0.68
0.32
3/8
16|24|32
0.375
0.369
0.5625
0.551
0.65
0.618
0.81
0.39
7/16
14|20|28
0.4375
0.4305
0.625
0.612
0.722
0.685
0.93
0.46
1/2
13|20|28
0.5
0.493
0.75
0.736
0.866
0.825
1.07
0.51
9/16
12|18|24
0.5625
0.5545
0.8125
0.798
0.938
0.895
1.19
0.57
5/8
11|18|24
0.625
0.617
0.9375
0.922
1.083
1.034
1.33
0.62
3/4
10|16|20
0.75
0.741
1.125
1.1
1.299
1.234
1.59
0.73