材质 
1/4
20
0.2
0.18
0.445
0.435
0.5
5/16
18
0.25
0.23
0.525
0.515
0.59
3/8
16
0.312
0.292
0.6
0.585
0.67
7/16
14
0.375
0.35
0.71
0.695
0.79
1/2
12
0.437
0.417
0.82
0.8
0.91
5/8
11
0.562
0.542
1.01
0.985
1.12
3/4
10
0.687
0.668
1.2
1.175
1.34
7/8
9
0.75
0.72
1.3
1.27
1.45
1
8
0.875
0.835
1.48
1.45
1.65
1-1/8
7
1
0.96
1.67
1.64
1.87
1-1/4
7
1.125
1.08
1.86
1.815
2.07
1-3/8
6
1.25
1.19
2.05
2.005
2.29
1-1/2
6
1.375
1.315
2.22
2.175
2.48
1-5/8
5
1.58
1.44
2.41
2.365
2.7
1-3/4
5
1.625
1.565
2.58
2.52
2.87
2
4.5
1.75
1.69
2.76
2.7
3.08
2-1/4
4
1.875
1.815
3.15
3.09
3.52
2-1/2
4
2.125
2.065
3.55
3.49
3.98
2-3/4
3.5
2.375
2.315
3.89
3.83
4.37
3
3.5
2.625
2.525
4.18
4.08
4.65
3-1/4
3.25
2.875
2.775
4.53
4.43
5.05
3-1/2
3.25
3.125
3.025
4.85
4.75
5.42
3-3/4
3
3.375
3.275
5.18
5.08
5.79
4
3
3.625
3.525
5.55
5.45
6.21
4-1/2
2.875
4
3.85
6.38
6.255
7.1
5
2.75
4.5
4.35
7.3
7.175
8.18
5-1/2
2.625
5
4.85
8.35
8.225
9.38
6
2.5
5.5
5.35
9.45
9.325
10.63