材质 
#8
32|36
0.3438
0.332
0.21
0.083
#10
24|32
0.375
0.362
0.241
0.083
1/4
20|28|32
0.4375
0.4305
0.295
0.12
5/16
18|24|32
0.5
0.493
0.345
0.15
3/8
16|24|32
0.5625
0.5545
0.415
0.198
7/16
14|20|28
0.6875
0.6795
0.482
0.223
1/2
13|20|28
0.75
0.742
0.573
0.262
9/16
12|18|24
0.875
0.867
0.621
0.286
5/8
11|18|24
0.9375
0.9295
0.731
0.329
3/4
10|16|20
1.125
1.115
0.827
0.382
7/8
9|14|20
1.3125
1.3005
0.975
0.45
1
8|12|20
1.5
1.488
1.1
0.513
1-1/8
7|12|18
1.6875
1.6575
1.242
0.576
1-1/4
7|12|18
1.875
1.83
1.382
0.628
1-3/8
6|12|18
2.0625
2.0175
1.52
0.681
1-1/2
6|12|18
2.25
2.205
1.65
0.757