材质 
1/4
20
0.375
0.365
0.433
0.416
0.76
0.74
5/16
18
0.5
0.489
0.577
0.557
0.95
0.93
3/8
16
0.562
0.551
0.65
0.628
1.13
1.11
7/16
14
0.688
0.675
0.794
0.769
1.32
1.3
1/2
13
0.75
0.736
0.866
0.839
1.51
1.49
9/16
12
0.875
0.861
1.01
0.981
1.7
1.67
5/8
11
0.938
0.922
1.083
1.051
1.89
1.86
3/4
10
1.125
1.088
1.299
1.24
2.27
2.22
7/8
9
1.312
1.269
1.516
1.447
2.65
2.6
1
8
1.5
1.45
1.732
1.653
3.03
2.97
1-1/8
7
1.688
1.631
1.949
1.859
3.4
3.34
1-1/4
7
1.875
1.812
2.165
2.066
3.78
3.71
1-3/8
6
2.062
1.994
2.382
2.273
4.16
4.09
1-1/2
6
2.25
2.175
2.598
2.48
4.54
4.46
1-5/8
6
2.562
2.481
2.959
2.828
4.91
4.83
1-3/4
5
2.75
2.662
3.175
3.035
5.29
5.21
1-7/8
6
2.938
2.844
3.392
3.242
5.67
5.58
2
4.5
3.125
3.025
3.608
3.448
6.04
5.95
2-1/4
4.5
3.5
3.388
4.041
3.862
6.8
6.7
2-1/2
4
3.875
3.75
4.474
4.275
7.55
7.44
2-3/4
4
4.25
4.112
4.907
4.688
8.31
8.19
3
4
4.625
4.475
5.34
5.101
9.06
8.94
3-1/4
4
5
4.838
5.773
5.515
9.81
9.68
3-1/2
4
5.375
5.2
6.206
5.928
10.57
10.43
3-3/4
4
5.75
5.562
6.639
6.34
11.32
11.17
4
4
6.125
5.925
7.072
6.754
12.08
11.92
4-1/4
4
6.5
6.288
7.506
7.168
12.83
12.67
4-1/2
4
6.875
6.65
7.939
7.581
13.58
13.42
4-3/4
4
7.25
7.012
8.372
7.944
14.34
14.16
5
4
7.625
7.375
8.805
8.408
15.09
14.91
5-1/4
4
8
7.738
9.238
8.821
15.85
15.65
5-1/2
4
83.75
8.1
9.671
9.234
16.6
16.4
5-3/4
4
8.75
8.462
10.104
9.647
17.35
17.15
6
4
9.125
8.825
10.537
10.06
18.11
17.89