材质 
1/4
20|28|32
0.161
0.151
0.4375
0.4305
5/16
18|24|32
0.192
0.182
0.5
0.493
3/8
16|24|32
0.224
0.214
0.5625
0.5545
7/16
14|20|28
0.255
0.245
0.6875
0.6795
1/2
13|20|28
0.317
0.307
0.75
0.742
9/16
12|18|24
0.349
0.339
0.875
0.867
5/8
11|18|24
0.38
0.37
0.9375
0.9295
3/4
10|16|20
0.432
0.412
1.125
1.115
7/8
9|14|20
0.494
0.474
1.3125
1.3005
1
8|12|20
0.562
0.532
1.5
1.448
1-1/8
7|12|18
0.629
0.589
1.6875
1.6575
1-1/4
7|12|18
0.744
0.694
1.875
1.83
1-3/8
6|12|18
0.806
0.756
2.0625
2.0175
1-1/2
6|12|18
0.874
0.814
2.25
2.205
1-3/4
5|8|12
0.999
0.939
2.625
2.565
2
4.5
1.754
1.684
3
2.94